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       # ZYXEL COMMUNICATIONS CORPORATION
       
          ELITE 2864I-U, ELITE 2864I-S/T
       
          Card Type              Modem                                     
                                 (synchronous/asynchronous)/Fax/Voice/ISDN 
          Chipset                Siemens-Nixdorf                           
          ISDN Transfer Rate     128Kbps/112Kbps/64Kbps/56Kbps             
          Maximum Modem Rate     28.8Kbps                                  
          Maximum Fax Rate       14.4Kbps                                  
          Data Bus               Serial/Parallel                           
          Fax Class              Class I & II                              
          ISDN Protocol          ITU-T V.110, V.120, X.75                  
                                                                           
                                 PPP, SLIP                                 
          Modem Modulation       Bell 103A/212A                            
          Protocol                                                         
                                 ITU-T V.21, V.22, V.22bis, V.23, V.26bis, 
                                 V.27bis, V.29, V.32, V.32bis, V.33, V.34  
                                                                           
                                 ZyXEL ZyX19200, ZyX16800, ZyCELL cellular 
          Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29        
          Protocol               
          Error                  MNP5, V.42, V.42bis                       
          Correction/Compression 
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |   Function   |  Label   |      Function      |    Label    |
          |------------------------------------------------------------|
          | RS-232/422 port    |    CN1    | Parallel port       | CN5 |
          |--------------------+-----------+---------------------+-----|
          | Line out           |    CN2    | Data/voice switch   | BT1 |
          |--------------------+-----------+---------------------+-----|
          | Line in            |    CN3    | Originate/answer    | BT2 |
          |                    |           | switch              |     |
          |--------------------+-----------+---------------------+-----|
          | DC power           |    CN4    |                     |     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                            DRAM                            |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       4MB        |     (2) 4M x 4     |        None        |
          |------------------+--------------------+--------------------|
          |       8MB        |     (2) 4M x 4     |     (2) 4M x 4     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                DIAGNOSTIC LED(S) - POWER-UP                |
          |------------------------------------------------------------|
          |  LED  |   Status   |               Condition               |
          |-------+------------+---------------------------------------|
          |  HLD  |     On     |   Mainboard is performing self-test   |
          |-------+------------+---------------------------------------|
          |  HLD  |    Off     |      Mainboard passed self-test       |
          |-------+------------+---------------------------------------|
          |  LNK  |  1 blink   |    ROM checksum error on mainboard    |
          |-------+------------+---------------------------------------|
          |  LNK  |  2 blinks  |     DRAM on mainboard failed test     |
          |-------+------------+---------------------------------------|
          |  LNK  |  3 blinks  |  EEPROM checksum error on mainboard   |
          |-------+------------+---------------------------------------|
          |  LNK  |  4 blinks  |    DSP RAM failed test with code A    |
          |-------+------------+---------------------------------------|
          |  LNK  |  5 blinks  |    DSP RAM failed test with code B    |
          |-------+------------+---------------------------------------|
          |  LNK  |  6 blinks  | VO analog circuit failed calibration  |
          |       |            |                 test                  |
          |-------+------------+---------------------------------------|
          |  LNK  |  7 blinks  | VR analog circuit failed calibration  |
          |       |            |                 test                  |
          |-------+------------+---------------------------------------|
          |  LNK  |  8 blinks  | FR analog circuit failed calibration  |
          |       |            |                 test                  |
          |-------+------------+---------------------------------------|
          |  LNK  |  9 blinks  | DSP to controller communications test |
          |       |            |          failed with code A           |
          |-------+------------+---------------------------------------|
          |  LNK  | 10 blinks  | DSP to controller communications test |
          |       |            |          failed with code B           |
          |-------+------------+---------------------------------------|
          |  LNK  |     On     |           All tests passed            |
          |------------------------------------------------------------|
          |  B1 Status  |    B2    |    AA    |       Condition        |
          |             |  Status  |  Status  |                        |
          |-------------+----------+----------+------------------------|
          |     On      |   Off    |   Off    | 2086 chip address/bus  |
          |             |          |          | test or interface test |
          |             |          |          |     1 in progress      |
          |-------------+----------+----------+------------------------|
          |  Blinking   |   Off    |   Off    | 2086 chip address/bus  |
          |             |          |          |  or interface test 1   |
          |             |          |          |         failed         |
          |-------------+----------+----------+------------------------|
          |     Off     |    On    |   Off    |   2086 chip function   |
          |             |          |          |    test in progress    |
          |-------------+----------+----------+------------------------|
          |     Off     | Blinking |   Off    |   2086 chip function   |
          |             |          |          |      test failed       |
          |-------------+----------+----------+------------------------|
          |     Off     |   Off    |    On    |   2160 chip function   |
          |             |          |          |   test or 2086 chip    |
          |             |          |          |  interface test 3 in   |
          |             |          |          |        progress        |
          |-------------+----------+----------+------------------------|
          |     Off     |   Off    | Blinking |   2160 chip function   |
          |             |          |          |   test or 2086 chip    |
          |             |          |          |    interface test 3    |
          |             |          |          |         failed         |
          |-------------+----------+----------+------------------------|
          |     Off     |   Off    |   Off    |  2086 chip interface   |
          |             |          |          |   test 2 in progress   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED | Color | Status |              Condition              |
          |-----+-------+--------+-------------------------------------|
          | PWR |  Red  |   On   |             Power is on             |
          |-----+-------+--------+-------------------------------------|
          | PWR |  Red  |  Off   |            Power is off             |
          |-----+-------+--------+-------------------------------------|
          | MDM |  Red  |   On   |   Modem is connected in data mode   |
          |-----+-------+--------+-------------------------------------|
          | MDM |  Red  |  Off   | Modem is not connected in data mode |
          |-----+-------+--------+-------------------------------------|
          | FAX |  Red  |   On   |   Modem is connected in fax mode    |
          |-----+-------+--------+-------------------------------------|
          | FAX |  Red  |  Off   | Modem is not connected in fax mode  |
          |-----+-------+--------+-------------------------------------|
          | VO  |  Red  |   On   |  Modem is connected in voice mode   |
          |-----+-------+--------+-------------------------------------|
          | VO  |  Red  |  Off   |   Modem is not connected in voice   |
          |     |       |        |                mode                 |
          |-----+-------+--------+-------------------------------------|
          | SP  |  Red  |   On   | Modem is communicating over serial  |
          |     |       |        |                port                 |
          |-----+-------+--------+-------------------------------------|
          | SP  |  Red  |  Off   |   Modem is not communicating over   |
          |     |       |        |             serial port             |
          |-----+-------+--------+-------------------------------------|
          | PRP |  Red  |   On   |   Modem is printing over parallel   |
          |     |       |        |                port                 |
          |-----+-------+--------+-------------------------------------|
          | PRP |  Red  |  Off   | Modem is not printing over parallel |
          |     |       |        |                port                 |
          |-----+-------+--------+-------------------------------------|
          | PCP |  Red  |   On   |     Modem is communicating over     |
          |     |       |        |            parallel port            |
          |-----+-------+--------+-------------------------------------|
          | PCP |  Red  |  Off   |   Modem is not communicating over   |
          |     |       |        |            parallel port            |
          |-----+-------+--------+-------------------------------------|
          | B1  |  Red  |   On   | ISDN B1 channel connection has been |
          |     |       |        |             established             |
          |-----+-------+--------+-------------------------------------|
          | B1  |  Red  |  Off   | ISDN B1 channel connection has not  |
          |     |       |        |          been established           |
          |-----+-------+--------+-------------------------------------|
          | B1  |  Red  |  Slow  | ISDN B1 channel connection has been |
          |     |       | Blink  |   established with DES encryption   |
          |-----+-------+--------+-------------------------------------|
          | B1  |  Red  |  Fast  | ISDN B1 channel connection has been |
          |     |       | Blink  |     established with triple DES     |
          |-----+-------+--------+-------------------------------------|
          | B2  |  Red  |   On   | ISDN B2 channel connection has been |
          |     |       |        |             established             |
          |-----+-------+--------+-------------------------------------|
          | B2  |  Red  |  Off   | ISDN B2 channel connection has not  |
          |     |       |        |          been established           |
          |-----+-------+--------+-------------------------------------|
          | B2  |  Red  |  Slow  | ISDN B2 channel connection has been |
          |     |       | Blink  |   established with DES encryption   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DIAGNOSTIC LED(S) (CON’T)                  |
          |------------------------------------------------------------|
          |   LED   | Color |  Status  |           Condition           |
          |---------+-------+----------+-------------------------------|
          |   B2    |  Red  |   Fast   |  ISDN B2 channel connection   |
          |         |       |  Blink   |   has been established with   |
          |         |       |          |          triple DES           |
          |---------+-------+----------+-------------------------------|
          |   AA    |  Red  |    On    |      Auto-answer enabled      |
          |---------+-------+----------+-------------------------------|
          |   AA    |  Red  |   Off    |     Auto-answer disabled      |
          |---------+-------+----------+-------------------------------|
          |   AA    |  Red  | Blinking |       Phone is ringing        |
          |---------+-------+----------+-------------------------------|
          |   CD    |  Red  |    On    |    Carrier signal detected    |
          |---------+-------+----------+-------------------------------|
          |   CD    |  Red  |   Off    |  Carrier signal not detected  |
          |---------+-------+----------+-------------------------------|
          |         |       |          |   Terminal   |  Printer Mode  |
          |         |       |          |     Mode     |                |
          |---------+-------+----------+--------------+----------------|
          | DTR/POL |  Red  |    On    |  DTR signal  |   Printer is   |
          |         |       |          |   is high    |    on-line     |
          |---------+-------+----------+--------------+----------------|
          | DTR/POL |  Red  |   Off    |  DTR signal  |   Printer is   |
          |         |       |          |    is low    |    off-line    |
          |---------+-------+----------+--------------+----------------|
          | DSR/PSL |  Red  |    On    |  DSR signal  |   Printer is   |
          |         |       |          |   is high    |   ready for    |
          |         |       |          |              |     input      |
          |---------+-------+----------+--------------+----------------|
          | DSR/PSL |  Red  |   Off    |  DSR signal  | Printer is not |
          |         |       |          |    is low    |   ready for    |
          |         |       |          |              |     input      |
          |---------+-------+----------+--------------+----------------|
          | RTS/PPE |  Red  |    On    |  RTS signal  | Printer is out |
          |         |       |          |   is high    |    of paper    |
          |---------+-------+----------+--------------+----------------|
          | RTS/PPE |  Red  |   Off    |  RTS signal  |    Printer is  |
          |         |       |          |    is low    |    not out of  |
          |         |       |          |              |      paper     |
          |---------+-------+----------+--------------+----------------|
          | CTS/PER |  Red  |    On    |  CTS signal  |  Printer has   |
          |         |       |          |   is high    | encountered an |
          |         |       |          |              |     error      |
          |---------+-------+----------+--------------+----------------|
          | CTS/PER |  Red  |   Off    |  CTS signal  |  Printer has   |
          |         |       |          |    is low    |      not       |
          |         |       |          |              | encountered an |
          |         |       |          |              |     error      |
          |---------+-------+----------+-------------------------------|
          |   TXD   |  Red  |    On    |  Modem is transmitting data   |
          |---------+-------+----------+-------------------------------|
          |   TXD   |  Red  |   Off    |   Modem is not transmitting   |
          |         |       |          |             data              |
          |---------+-------+----------+-------------------------------|
          |   RXD   |  Red  |    On    |    Modem is receiving data    |
          |---------+-------+----------+-------------------------------|
          |   RXD   |  Red  |   Off    |  Modem is not receiving data  |
          |---------+-------+----------+-------------------------------|
          |   HLD   |  Red  |    On    |  Call is on hold on handset   |
          |---------+-------+----------+-------------------------------|
          |   HLD   |  Red  |   Off    |    Call is not on hold on     |
          |         |       |          |            handset            |
          |---------+-------+----------+-------------------------------|
          |   LNK   |  Red  |    On    |  ISDN physical layer active   |
          |---------+-------+----------+-------------------------------|
          |   LNK   |  Red  |   Off    | ISDN physical layer inactive  |
          |---------+-------+----------+-------------------------------|
          |   LNK   |  Red  | Blinking |       ISDN D channel in       |
          |         |       |          |      multiple-frame mode      |
          |---------+-------+----------+-------------------------------|
          |   OH    |  Red  |    On    |       Modem is off-hook       |
          |---------+-------+----------+-------------------------------|
          |   OH    |  Red  |   Off    |       Modem is on-hook        |
          |---------+-------+----------+-------------------------------|
          |   ORG   |  Red  |    On    |  Modem is in originate mode   |
          |---------+-------+----------+-------------------------------|
          |   ORG   |  Red  |   Off    |    Modem is in answer mode    |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |           ADDRESS IDENTIFICATION - INCOMING CALL           |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &ZIn=<#> [cmds]                   |
          |--------------+---------------------------------------------|
          | Description: | Compares the number for an incoming call to |
          |              | the address stored for each value of n. If  |
          |              | the numbers match, the call is routed to    |
          |              | the appropriate mode and protocol.          |
          |--------------+---------------------------------------------|
          |   Argument   |                  Function                   |
          |--------------+---------------------------------------------|
          |     n=0      | Set address for X.75 ISDN.                  |
          |--------------+---------------------------------------------|
          |     n=1      | Set address for V.110 ISDN.                 |
          |--------------+---------------------------------------------|
          |     n=2      | Set address for V.120 ISDN.                 |
          |--------------+---------------------------------------------|
          |     n=3      | Set address for PPP asynchronous to HDLC    |
          |              | conversion.                                 |
          |--------------+---------------------------------------------|
          |     n=4      | Set address for SLIP asynchronous to HDLC   |
          |              | conversion.                                 |
          |--------------+---------------------------------------------|
          |     n=6      | Set address for fax/modem.                  |
          |--------------+---------------------------------------------|
          |     n=7      | Set address for A/B adapter.                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   ADDRESS IDENTIFICATION                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &ZOy=YaNb<#>/Zcxxxx/ [cmds]       |
          |              |                                             |
          |              | AT [cmds] &ZOy=A/Zcxxxx/ [cmds]             |
          |--------------+---------------------------------------------|
          | Description: | Sets the modem’s call identification to     |
          |              | identify itself to remote ISDN devices. A   |
          |              | indicates that no number is specified.      |
          |--------------+---------------------------------------------|
          | Note:        | One of either the YaNb<#> arguments or the  |
          |              | A/Zcxxxx/ must be present.                  |
          |--------------+---------------------------------------------|
          |   Argument   |                  Function                   |
          |--------------+---------------------------------------------|
          |     y=M      | Set address for fax/modem.                  |
          |--------------+---------------------------------------------|
          |     y=I      | Set address for ISDN.                       |
          |--------------+---------------------------------------------|
          |     y=B      | Set address for A/B adapter.                |
          |--------------+---------------------------------------------|
          |    í a=0     | Unknown number locality.                    |
          |--------------+---------------------------------------------|
          |     a=1      | International number.                       |
          |--------------+---------------------------------------------|
          |     a=2      | National number.                            |
          |--------------+---------------------------------------------|
          |     a=3      | Network number.                             |
          |--------------+---------------------------------------------|
          |     a=4      | Subscriber number.                          |
          |--------------+---------------------------------------------|
          |    í b=0     | Unknown number type.                        |
          |--------------+---------------------------------------------|
          |     b=1      | ISDN type number.                           |
          |--------------+---------------------------------------------|
          |     b=3      | X.121 data type number.                     |
          |--------------+---------------------------------------------|
          |     b=4      | Telex type number.                          |
          |--------------+---------------------------------------------|
          |     b=8      | National standard number.                   |
          |--------------+---------------------------------------------|
          |     b=9      | Private number.                             |
          |--------------+---------------------------------------------|
          |    í c=0     | NSAP subaddress of IA5 characters,          |
          |              | AFI=0x50.                                   |
          |--------------+---------------------------------------------|
          |     c=2      | User specified subaddress of IA5            |
          |              | characters.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    AUTO-ANSWER PRIORITY                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Ln [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects how the modem will answer calls it  |
          |              | cannot determine the call’s type.           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &L0     | A/B adapter answers first.                  |
          |--------------+---------------------------------------------|
          |     &L1      | Data/fax answers first.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S14                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S14=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 2                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls sync/async, clock source, line     |
          |              | type, loopback test request, and leased     |
          |              | line mode.                                  |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Originate mode in leased line operation.    |
          |      |       |                                             |
          |      |     1 | Answer mode in leased line operation.       |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Grant request for remote digital loopback   |
          |      |       | test.                                       |
          |      |   í 1 |                                             |
          |      |       | Deny request for remote digital loopback    |
          |      |       | test.                                       |
          |------+-------+---------------------------------------------|
          | 3, 2 |  í 00 | Switched line type.                         |
          |      |       |                                             |
          |      |    01 | Two-wire leased line type.                  |
          |      |       |                                             |
          |      |    10 | Four-wire leased line type.                 |
          |------+-------+---------------------------------------------|
          | 5, 4 |  í 00 | Clock signal local internal.                |
          |      |       |                                             |
          |      |    01 | Clock signal local external.                |
          |      |       |                                             |
          |      |    10 | Clock signal remote.                        |
          |------+-------+---------------------------------------------|
          | 7, 6 |  í 00 | Buffered asynchronous mode.                 |
          |      |       |                                             |
          |      |    01 | Asynchronous while in command mode, switch  |
          |      |       | to synchronous while in data mode.          |
          |      |    10 |                                             |
          |      |       | Unbuffered asynchronous mode.               |
          |      |    11 |                                             |
          |      |       | Synchronous mode.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S15                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S15=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 130                                      |
          |-----------------+------------------------------------------|
          | Range:          | 0 - 158                                  |
          |-----------------+------------------------------------------|
          | Unit:           | Bit-mapped                               |
          |-----------------+------------------------------------------|
          | Description:    | Controls active profile and data format. |
          |-----------------+------------------------------------------|
          |   Bit   | Value |                 Function                 |
          |---------+-------+------------------------------------------|
          |  1, 0   |    00 | Use even parity.                         |
          |         |       |                                          |
          |         |    01 | Use odd parity.                          |
          |         |       |                                          |
          |         |  í 10 | Do not use parity.                       |
          |---------+-------+------------------------------------------|
          |    2    |   í 0 | Use 1 stop bit.                          |
          |         |       |                                          |
          |         |     1 | Use 2 stop bit.                          |
          |---------+-------+------------------------------------------|
          |  4, 3   |  í 00 | Use 10-bit characters.                   |
          |         |       |                                          |
          |         |    01 | Use 11-bit characters.                   |
          |         |       |                                          |
          |         |    10 | Use 9-bit characters.                    |
          |         |       |                                          |
          |         |    11 | Use 8-bit characters.                    |
          |---------+-------+------------------------------------------|
          | 7, 6, 5 |   000 | Profile 0 active at power-up.            |
          |         |       |                                          |
          |         |   001 | Profile 1 active at power-up.            |
          |         |       |                                          |
          |         |   010 | Profile 2 active at power-up.            |
          |         |       |                                          |
          |         |   011 | Profile 3 active at power-up.            |
          |         |       |                                          |
          |         | í 100 | Factory defaults active at power-up.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S17                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S17=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 18                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 191                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls command set type, dialing mode,    |
          |              | leased line transmit attenuation, and       |
          |              | secondary networking channel.               |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Secondary channel disabled.                 |
          |      |       |                                             |
          |      |     1 | Secondary channel enabled.                  |
          |------+-------+---------------------------------------------|
          | 4 -  |  0000 | Sets leased line transmit attenuation level |
          |  1   |       | to 0dBm.                                    |
          |      |   ... |                                             |
          |      |       | ...                                         |
          |      |     í |                                             |
          |      |  1001 | Sets leased line transmit attenuation level |
          |      |       | to -9dBm.                                   |
          |      |   ... |                                             |
          |      |       | ...                                         |
          |      |  1111 |                                             |
          |      |       | Sets leased line transmit attenuation level |
          |      |       | to -15dBm.                                  |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Originate mode.                             |
          |      |       |                                             |
          |      |     1 | Answer mode.                                |
          |------+-------+---------------------------------------------|
          | 7, 6 |  í 00 | AT command set enabled.                     |
          |      |       |                                             |
          |      |    01 | V25bis command set enabled.                 |
          |      |       |                                             |
          |      |    10 | Command sets disabled.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S21                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S21=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 178                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls DTR, CTS, CD, and DSR signals,     |
          |              | speaker, and error correction.              |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Attempt an error-correcting connection. If  |
          |      |       | that fails, attempt a normal connection.    |
          |      |     1 |                                             |
          |      |       | Attempt an error-correcting connection. If  |
          |      |       | that fails, hang up.                        |
          |------+-------+---------------------------------------------|
          | 2, 1 |    00 | Speaker disabled.                           |
          |      |       |                                             |
          |      |  í 01 | Speaker enabled until carrier signal        |
          |      |       | detected                                    |
          |      |    10 |                                             |
          |      |       | Speaker enabled.                            |
          |      |    11 |                                             |
          |      |       | Speaker enabled following dialing, then     |
          |      |       | disabled after carrier signal detected.     |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | DSR forced high.                            |
          |      |       |                                             |
          |      |     1 | DSR normal.                                 |
          |------+-------+---------------------------------------------|
          |  4   |     0 | CD forced high.                             |
          |      |       |                                             |
          |      |   í 1 | CD normal.                                  |
          |------+-------+---------------------------------------------|
          |  5   |     0 | CTS follows RTS when in synchronous mode.   |
          |      |       |                                             |
          |      |   í 1 | CTS forced high when in synchronous mode.   |
          |------+-------+---------------------------------------------|
          | 7, 6 |    00 | DTR is forced on.                           |
          |      |       |                                             |
          |      |    01 | Dial default number on high DTR; hang up on |
          |      |       | low DTR.                                    |
          |      |  í 10 |                                             |
          |      |       | Low DTR hangs up and returns to command     |
          |      |    11 | mode.                                       |
          |      |       |                                             |
          |      |       | Low DTR hangs up and resets the modem to    |
          |      |       | profile 0.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S23                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S23=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 105                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls result codes, dialing, and echo.   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Command echoing disabled.                   |
          |      |       |                                             |
          |      |   í 1 | Command echoing enabled.                    |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Select pulse dial make/break ratio of       |
          |      |       | 39/61ms at 10pps (North America).           |
          |      |     1 |                                             |
          |      |       | Select pulse dial make/break ratio of       |
          |      |       | 33/67ms at 10pps (Europe).                  |
          |------+-------+---------------------------------------------|
          |  5,  |   000 | Basic result codes only enabled.            |
          | 4, 3 |       |                                             |
          |      |   001 | Basic and connection speed result codes     |
          |      |       | enabled.                                    |
          |      |   010 |                                             |
          |      |       | Basic and connection speed result codes and |
          |      |   011 | dialtone detection enabled.                 |
          |      |       |                                             |
          |      |   100 | All result codes except dialtone detection  |
          |      |       | enabled.                                    |
          |      | í 101 |                                             |
          |      |       | All result codes enabled.                   |
          |      |   110 |                                             |
          |      |       | All result codes plus DTE speed and error   |
          |      |   111 | control level enabled.                      |
          |      |       |                                             |
          |      |       | All result codes plus ARQ enabled.          |
          |      |       |                                             |
          |      |       | All result codes plus ARQ and error control |
          |      |       | level enabled.                              |
          |------+-------+---------------------------------------------|
          |  6   |     0 | Display result codes in numeric form.       |
          |      |       |                                             |
          |      |   í 1 | Display result codes in long form.          |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Result codes enabled.                       |
          |      |       |                                             |
          |      |     1 | Result codes disabled.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S24                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S24=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 138                                      |
          |-----------------+------------------------------------------|
          | Range:          | 0 - 238                                  |
          |-----------------+------------------------------------------|
          | Unit:           | Bit-mapped                               |
          |-----------------+------------------------------------------|
          | Description:    | Controls speaker volume and ring volume. |
          |-----------------+------------------------------------------|
          |   Bit   | Value |                 Function                 |
          |---------+-------+------------------------------------------|
          |    0    |     0 | Not used.                                |
          |---------+-------+------------------------------------------|
          | 3, 2, 1 |   000 | Ring volume off.                         |
          |         |       |                                          |
          |         |   001 | Ring volume low.                         |
          |         |       |                                          |
          |         | í 100 | ...                                      |
          |         |       |                                          |
          |         |   111 | Ring volume medium.                      |
          |         |       |                                          |
          |         |       | ...                                      |
          |         |       |                                          |
          |         |       | Ring volume high.                        |
          |---------+-------+------------------------------------------|
          |    4    |     0 | Not used.                                |
          |---------+-------+------------------------------------------|
          | 7, 6, 5 |   000 | Speaker volume off.                      |
          |         |       |                                          |
          |         |   001 | Speaker volume low.                      |
          |         |       |                                          |
          |         |   100 | ...                                      |
          |         |       |                                          |
          |         | í 101 | Speaker volume medium.                   |
          |         |       |                                          |
          |         |   111 | ...                                      |
          |         |       |                                          |
          |         |       | Speaker volume high.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S27                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S27=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 156                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 228                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls reaction to poor signal quality,   |
          |              | flow control, and error correction.         |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  2,  |   000 | Error correction disabled for fax/modem.    |
          | 1, 0 |       |                                             |
          |      |   001 | MNP4 enabled for fax/modem.                 |
          |      |       |                                             |
          |      |   010 | MNP5 enabled for fax/modem.                 |
          |      |       |                                             |
          |      |   011 | V.42 and MNP4 enabled for fax/modem.        |
          |      |       |                                             |
          |      | í 100 | V.42bis and MNP5 enabled for fax/modem.     |
          |------+-------+---------------------------------------------|
          |  5,  |   000 | Flow control disabled.                      |
          | 4, 3 |       |                                             |
          |      | í 011 | Hardware flow control enabled.              |
          |      |       |                                             |
          |      |   100 | Software flow control enabled.              |
          |------+-------+---------------------------------------------|
          | 7, 6 |    00 | Modem does nothing during poor signal       |
          |      |       | quality.                                    |
          |      |    01 |                                             |
          |      |       | Modem retrains during poor signal quality.  |
          |      |  í 10 |                                             |
          |      |       | Modem fall-back during poor signal quality, |
          |      |    11 | and fall-forward when signal improves.      |
          |      |       |                                             |
          |      |       | Modem will disconnect during poor signal    |
          |      |       | quality.                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S28                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S28=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 68                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 235                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls front panel lock, break type,      |
          |              | guard tone, local serial port speed lock,   |
          |              | and 1200bps protocol.                       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Panel key unlocked.                         |
          |      |       |                                             |
          |      |     1 | Panel key locked.                           |
          |------+-------+---------------------------------------------|
          | 3, 2 |    00 | Destructive break sent ahead of data        |
          |      |       | stream.                                     |
          |      |  í 01 |                                             |
          |      |       | Non-destructive break sent ahead of data    |
          |      |    10 | stream.                                     |
          |      |       |                                             |
          |      |       | Non-destructive break sent at end of data   |
          |      |       | stream.                                     |
          |------+-------+---------------------------------------------|
          | 5, 4 |  í 00 | Guard tone disabled.                        |
          |      |       |                                             |
          |      |    10 | Guard tone enabled.                         |
          |------+-------+---------------------------------------------|
          |  6   |     0 | Local serial port speed follows connect     |
          |      |       | speed.                                      |
          |      |   í 1 |                                             |
          |      |       | Local serial port speed locked.             |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Sets V.22 as 1200bps protocol.              |
          |      |       |                                             |
          |      |     1 | Sets Bell 212/A as 1200bps protocol.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S35                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S35=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 32                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls 4800bps V.32, handshake            |
          |              | interruption, V.26bis mode, leased line     |
          |              | transmission attenuation, Selective Reject, |
          |              | password protection, and extended result    |
          |              | codes.                                      |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | 4800bps V.32 normal.                        |
          |      |       |                                             |
          |      |     1 | Use ZyCELL 4800bps trellis coded instead of |
          |      |       | 4800bps V.32.                               |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Handshake can be interrupted.               |
          |      |       |                                             |
          |      |     1 | Handshake cannot be interrupted.            |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | V.26bis normal.                             |
          |      |       |                                             |
          |      |     1 | V.26bis mode A.                             |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Leased line transmission level normal.      |
          |      |       |                                             |
          |      |     1 | Leased line transmission is attenuated by   |
          |      |       | -12dBm.                                     |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Modem will not dial default number when     |
          |      |       | Data/Voice button is pressed                |
          |      |     1 |                                             |
          |      |       | Modem will dial default number when         |
          |      |       | Data/Voice button is pressed                |
          |------+-------+---------------------------------------------|
          |  5   |     0 | V.42 Selective Reject disabled.             |
          |      |       |                                             |
          |      |   í 1 | V.42 Selective Reject enabled.              |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Profile password protection disabled.       |
          |      |       |                                             |
          |      |     1 | Profile password protection enabled.        |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Connection speed result codes disabled on   |
          |      |       | error correcting connection.                |
          |      |     1 |                                             |
          |      |       | Connection speed result codes enabled on    |
          |      |       | error correcting connection.                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S36                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S36=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 163                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls security and remote profiles.      |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Deny remote request for current             |
          |      |       | configuration.                              |
          |      |     1 |                                             |
          |      |       | Grant remote request for current            |
          |      |       | configuration.                              |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Copies local profile to remote profile.     |
          |      |       | Profiles set with S37.                      |
          |      |     1 |                                             |
          |      |       | Copies remote profile to local profile.     |
          |      |       | Profiles set with S37.                      |
          |------+-------+---------------------------------------------|
          | 4-2  |   000 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  7,  | í 000 | Security disabled.                          |
          | 6, 5 |       |                                             |
          |      |   001 | Security type I and password check enabled. |
          |      |       |                                             |
          |      |   010 | Security type I, callback, and password     |
          |      |       | check enabled.                              |
          |      |   011 |                                             |
          |      |       | Security type II and password check         |
          |      |   100 | enabled.                                    |
          |      |       |                                             |
          |      |   101 | Security type II, callback, and password    |
          |      |       | check enabled.                              |
          |      |       |                                             |
          |      |       | Security type II, callback, and password    |
          |      |       | check enabled. Callback number sent by      |
          |      |       | remote.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S38                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S38=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 57                                      |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls auto-dial, CD signal, fax          |
          |              | auto-answer, and MNP5.                      |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Auto-dial of default number disabled.       |
          |      |       |                                             |
          |      |     1 | Auto-dial of default number enabled.        |
          |------+-------+---------------------------------------------|
          | 2-1  |    00 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | CD normal.                                  |
          |      |       |                                             |
          |      |     1 | CD according to UNIX standard.              |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Fax auto-answer enabled.                    |
          |      |       |                                             |
          |      |     1 | Fax auto-answer disabled.                   |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | MNP5 enabled.                               |
          |      |       |                                             |
          |      |     1 | MNP5 disabled.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S39                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S39=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 252                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls answer mode, Class 2 fax modes,    |
          |              | V.26bis scrambler, DTMF detection, and      |
          |              | resync info.                                |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1-0  |    00 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Answer in answer mode.                      |
          |      |       |                                             |
          |      |     1 | Answer in originate mode.                   |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Normal Class 2 fax.                         |
          |      |       |                                             |
          |      |     1 | Bitfax-compatible Class 2 fax.              |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Normal Class 2 fax.                         |
          |      |       |                                             |
          |      |     1 | Local serial port speed shift for Class 2   |
          |      |       | fax.                                        |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | V.26bis scrambler enabled.                  |
          |      |       |                                             |
          |      |     1 | V.26bis scrambler disabled.                 |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | DTMF detection in voice mode only.          |
          |      |       |                                             |
          |      |     1 | DTMF detection on AT+VLS=2 command.         |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Resync information not included in ADPCM    |
          |      |       | voice file.                                 |
          |      |     1 |                                             |
          |      |       | Resync information included in ADPCM voice  |
          |      |       | file.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S40                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S40=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 126                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls extended ring detection and result |
          |              | codes.                                      |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Modem returns result codes.                 |
          |      |       |                                             |
          |      |     1 | Modem does not return result codes.         |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Caller ID disabled.                         |
          |      |       |                                             |
          |      |     1 | Caller ID enabled.                          |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Ring type 1 detection disabled.             |
          |      |       |                                             |
          |      |     1 | Ring type 1 detection enabled.              |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Ring type 2 detection disabled.             |
          |      |       |                                             |
          |      |     1 | Ring type 2 detection enabled.              |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Ring type 3 detection disabled.             |
          |      |       |                                             |
          |      |     1 | Ring type 3 detection enabled.              |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Ring type 4 detection disabled.             |
          |      |       |                                             |
          |      |     1 | Ring type 4 detection enabled.              |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Not used.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S41                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S41=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls MNP compatibility mode, V.25bis    |
          |              | idle, retrain timeout, loopback tests,      |
          |              | blind dial time, DSR signal, S0 register,   |
          |              | and calling tone.                           |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | MNP compatibility mode disabled.            |
          |      |       |                                             |
          |      |     1 | MNP compatibility mode enabled.             |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Use flag for V.25bis idle.                  |
          |      |       |                                             |
          |      |     1 | Use mark for V.25bis idle.                  |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Retrain timeout normal.                     |
          |      |       |                                             |
          |      |     1 | Retrain timeout set to 5 minutes.           |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Loopback test signals disabled.             |
          |      |       |                                             |
          |      |     1 | Loopback test signals enabled.              |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Modem waits for dial tone before dialing.   |
          |      |       |                                             |
          |      |     1 | Modem waits for time set in S6 and then     |
          |      |       | blind-dials.                                |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | DSR normal.                                 |
          |      |       |                                             |
          |      |     1 | DSR follows CD and goes low for 1/2 second  |
          |      |       | on loss of carrier.                         |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Register S0 behaves normally.               |
          |      |       |                                             |
          |      |     1 | Force S0 to be greater than 2.              |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Respond to calling tone.                    |
          |      |       |                                             |
          |      |     1 | Ignore calling tone.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S42                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S42=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls secondary channel speed,           |
          |              | throughput averaging, Caller ID display,    |
          |              | escape sequence, V.17 mode, data/voice      |
          |              | switch, and CD signal.                      |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Secondary channel 2400/75bps.               |
          |      |       |                                             |
          |      |     1 | Secondary channel 2400bps.                  |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Throughput averaging disabled.              |
          |      |       |                                             |
          |      |     1 | Throughput averaging enabled.               |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Caller ID information will be displayed     |
          |      |       | even if ATQ2 is set.                        |
          |      |     1 |                                             |
          |      |       | Caller ID information will not be displayed |
          |      |       | if ATQ2 is set.                             |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Escape sequence enabled in answer mode.     |
          |      |       |                                             |
          |      |     1 | Escape sequence disabled in answer mode.    |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | V.17 enabled.                               |
          |      |       |                                             |
          |      |     1 | Disable V.17 in originate mode.             |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Data/Voice switch enabled.                  |
          |      |       |                                             |
          |      |     1 | Data/Voice switch disabled.                 |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Enable RING result.                         |
          |      |       |                                             |
          |      |     1 | Disable RING result.                        |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | CD forced high.                             |
          |      |       |                                             |
          |      |     1 | CD pulses off at carrier loss.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S44                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S44=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 124                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: |                                             |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1-0  |    00 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Dial backup executed automatically.         |
          |      |       |                                             |
          |      |     1 | Dial backup waits for panel input.          |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Cyclic dial disabled.                       |
          |      |       |                                             |
          |      |     1 | Cyclic dial enabled.                        |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | DSR normal.                                 |
          |      |       |                                             |
          |      |     1 | DSR follows DTR.                            |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | V.13 simulation disabled.                   |
          |      |       |                                             |
          |      |     1 | V.13 simulation enabled.                    |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | &B0 |   Local serial port speed determined  |
          |      |       |     |   normally.                           |
          |      |     1 | &B1 |                                       |
          |      |       |     |   Local serial port is locked at      |
          |      |       |     |   19.2Kbps if link is 9600bps or      |
          |      |       |     |   faster, at 9600bps if link is       |
          |      |       |     |   7200bps, and else at link speed.    |
          |      |       |     |                                       |
          |      |       |     |   Local serial port locked if ARQ     |
          |      |       |     |   link, and follows link speed        |
          |      |       |     |   otherwise.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S48                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S48=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 63                                      |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls caller ID format, call answering,  |
          |              | calling tone, V.23 speed, DTR change        |
          |              | action, and protocol negotiation.           |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Caller ID displayed normally.               |
          |      |       |                                             |
          |      |     1 | Caller ID displayed as raw data.            |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Modem will answer all calls.                |
          |      |       |                                             |
          |      |     1 | Modem will answer data calls only.          |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Calling tone disabled.                      |
          |      |       |                                             |
          |      |     1 | Calling tone enabled.                       |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | V.23 speed set to 1200/75.                  |
          |      |       |                                             |
          |      |     1 | V.23 speed set to 75/1200.                  |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Modem does nothing on DTR change.           |
          |      |       |                                             |
          |      |     1 | Modem will dial default number on high DTR  |
          |      |       | and disconnect and reset on low DTR.        |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Modem will negotiate all protocols.         |
          |      |       |                                             |
          |      |     1 | Modem will not negotiate protocols faster   |
          |      |       | than 9600bps.                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S52                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S52=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 144                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls received signal level and initial  |
          |              | V.23 handshake signal.                      |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 2-0  |   000 | Not used.                                   |
          |------+-------+---------------------------------------------|
          | 4, 3 |  í 00 | Adjust received signal to -43dBm.           |
          |      |       |                                             |
          |      |    01 | Adjust received signal to -33dBm.           |
          |      |       |                                             |
          |      |    10 | Adjust received signal to -26dBm.           |
          |------+-------+---------------------------------------------|
          | 6-5  |    00 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | First signal of V.23 handshake is Mark.     |
          |      |       |                                             |
          |      |     1 | First signal of V.23 handshake is Space.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S57                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S57=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 16                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 80                                      |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls fax class 1 and busy detection     |
          |              | during dialing.                             |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 3-0  |  0000 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  4   |     0 | Fax class 1 disabled.                       |
          |      |       |                                             |
          |      |   í 1 | Fax class 1 enabled.                        |
          |------+-------+---------------------------------------------|
          |  5   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Busy detection disabled during dialing.     |
          |      |       |                                             |
          |      |     1 | Busy detection enabled during dialing.      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S80                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S80=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls originate/answer mode and          |
          |              | low-layer compatibility information.        |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Fax/modem operates in originate mode.       |
          |      |       |                                             |
          |      |     1 | Fax/modem operates in answer mode.          |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | ISDN D channel operates in originate mode.  |
          |      |       |                                             |
          |      |     1 | ISDN D channel operates in answer mode.     |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | ISDN B channel operates in originate mode.  |
          |      |       |                                             |
          |      |     1 | ISDN B channel operates in answer mode.     |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | A/B adapter operates in originate mode.     |
          |      |       |                                             |
          |      |     1 | A/B adapter operates in answer mode.        |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Fax/modem does not send low-level           |
          |      |       | compatibility information.                  |
          |      |     1 |                                             |
          |      |       | Fax/modem sends low-level compatibility     |
          |      |       | information.                                |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | ISDN D channel does not send low-level      |
          |      |       | compatibility information.                  |
          |      |     1 |                                             |
          |      |       | ISDN D channel sends low-level              |
          |      |       | compatibility information.                  |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | ISDN B channel does not send low-level      |
          |      |       | compatibility information.                  |
          |      |     1 |                                             |
          |      |       | ISDN B channel sends low-level              |
          |      |       | compatibility information.                  |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | A/B adapter does not send low-level         |
          |      |       | compatibility information.                  |
          |      |     1 |                                             |
          |      |       | A/B adapter sends low-level compatibility   |
          |      |       | information.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S83                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S83=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 55                                      |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls the Loopback 4 function, V.42bis   |
          |              | compression on ISDN, and the default        |
          |              | dialing device.                             |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Loopback 4 disabled.                        |
          |      |       |                                             |
          |      |     1 | Loopback 4 enabled.                         |
          |------+-------+---------------------------------------------|
          |  1   |     0 | V.42bis disabled on ISDN channel 2.         |
          |      |       |                                             |
          |      |     1 | V.42bis enabled on ISDN channel 2.          |
          |------+-------+---------------------------------------------|
          |  2   |     0 | V.42bis disabled on ISDN channel 1.         |
          |      |       |                                             |
          |      |     1 | V.42bis enabled on ISDN channel 1.          |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          | 5-4  |  í 00 | Originate calls in fax/data mode by         |
          |      |       | default.                                    |
          |      |    10 |                                             |
          |      |       | Originate calls in ISDN mode by default.    |
          |      |    11 |                                             |
          |      |       | Originate calls in A/B adapter mode by      |
          |      |       | default.                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S84                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S84=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls protocol capture, register value   |
          |              | format, caller ID information reporting,    |
          |              | auto-answer priority,CAPI standard, and     |
          |              | serial port mode.                           |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Serial protocol capturing disabled.         |
          |      |       |                                             |
          |      |     1 | Serial protocol capturing enabled.          |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | B-channel protocol capturing disabled.      |
          |      |       |                                             |
          |      |     1 | B-channel protocol capturing enabled.       |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | D-channel protocol capturing disabled.      |
          |      |       |                                             |
          |      |     1 | D-channel protocol capturing enabled.       |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Display register values in decimal.         |
          |      |       |                                             |
          |      |     1 | Display register values in hexadecimal.     |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Caller ID information display enabled.      |
          |      |       |                                             |
          |      |     1 | Caller ID information display disabled.     |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 |   A/B adapter answers an unknown call type  |
          |      |       |   first.                                    |
          |      |     1 |                                             |
          |      |       | Data/fax answers an unknown call type       |
          |      |       | first.                                      |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Use CAPI 1.1a standard.                     |
          |      |       |                                             |
          |      |     1 | Use CAPI 2.0 standard.                      |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Serial port in single-stream mode.          |
          |      |       |                                             |
          |      |     1 | Serial port in multistream mode.            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S87                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S87=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 114                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Indicates module type and controls          |
          |              | U-interface mode, DTMF dialing type, and    |
          |              | bundle connection mode.                     |
          |--------------+---------------------------------------------|
          | Note:        | Bit 7 is read-only.                         |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1-0  |  í 00 | U-interface operates in normal TA mode.     |
          |      |       |                                             |
          |      |    01 | U-interface operates in local modem RT      |
          |      |       | mode.                                       |
          |      |    10 |                                             |
          |      |       | U-interface operates in local modem COT     |
          |      |       | mode.                                       |
          |------+-------+---------------------------------------------|
          | 3-2  |    00 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Normal DTMF dialing for A/B adapter.        |
          |      |       |                                             |
          |      |     1 | En bloc DTMF dialing for A/B adapter. User  |
          |      |       | must dial # to send numbers.                |
          |------+-------+---------------------------------------------|
          | 6-5  |  í 00 | Bundle connections disabled.                |
          |      |       |                                             |
          |      |    01 | Bundle connections enabled on answer only.  |
          |      |       |                                             |
          |      |    10 | Bundle connections enabled on originate     |
          |      |       | only.                                       |
          |      |    11 |                                             |
          |      |       | Bundle connections enabled.                 |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Modem has S/T module.                       |
          |      |       |                                             |
          |      |     1 | Modem has U module.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S89                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S89=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls encryption and metering pulse.     |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | DES encryption disabled.                    |
          |      |       |                                             |
          |      |     1 | DES encryption enabled.                     |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Attempt single DES only.                    |
          |      |       |                                             |
          |      |     1 | Attempt triple DES.                         |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Public key system enabled. Modem will       |
          |      |       | generate key.                               |
          |      |     1 |                                             |
          |      |       | Public key system disabled. User must enter |
          |      |       | key.                                        |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Keep non-encrypted connection.              |
          |      |       |                                             |
          |      |     1 | Disconnect from non-encrypted connection.   |
          |------+-------+---------------------------------------------|
          | 5-4  |    00 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Metering pulse disabled.                    |
          |      |       |                                             |
          |      |     1 | Metering pulse enabled.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S118                  |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S118=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 54                                      |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls default line speed, low-speed      |
          |              | service type, and analog call acceptance.   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Use 64Kbps speed for DTE channel 1.         |
          |      |       |                                             |
          |      |     1 | Use 56Kbps speed for DTE channel 1.         |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Use 64Kbps speed for ISDN.                  |
          |      |       |                                             |
          |      |     1 | Use 56Kbps speed for ISDN.                  |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Use 3.1KHz service for fax/modem.           |
          |      |       |                                             |
          |      |     1 | Use voice service for fax/modem.            |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Use 3.1KHz service for A/B adapter.         |
          |      |       |                                             |
          |      |     1 | Use voice service for A/B adapter.          |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | All analog calls will be answered.          |
          |      |       |                                             |
          |      |     1 | Only analog calls with matching MSN will be |
          |      |       | answered.                                   |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Incoming analog calls will be answered.     |
          |      |       |                                             |
          |      |     1 | Incoming analog calls will be ignored.      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S119                  |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S119=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 54                                      |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls callback function, signalling DDI, |
          |              | call acceptance, V.110 minimum speed, and   |
          |              | MSN function.                               |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Callback function disabled.                 |
          |      |       |                                             |
          |      |     1 | Callback function enabled.                  |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Point-to-point signalling DDI function      |
          |      |       | disabled.                                   |
          |      |     1 |                                             |
          |      |       | Point-to-point signalling DDI function      |
          |      |       | enabled.                                    |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Multipoint signalling DDI function          |
          |      |       | disabled.                                   |
          |      |     1 |                                             |
          |      |       | Multipoint signalling DDI function enabled. |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | All calls will be answered.                 |
          |      |       |                                             |
          |      |     1 | Only calls with matching MSN will be        |
          |      |       | answered.                                   |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | V.110 speed set to 19.2Kbps if local serial |
          |      |       | port speed is 19.2Kbps or faster.           |
          |      |     1 |                                             |
          |      |       | V.110 speed set to 38.4Kbps if local serial |
          |      |       | port speed is 38.4Kbps or faster.           |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | MSN functions normally.                     |
          |      |       |                                             |
          |      |     1 | Treat MSN settings as subaddresses.         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK TYPE                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Yn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Configures action of break signal.          |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &Y0      | Break empties buffer and is sent            |
          |              | immediately.                                |
          |--------------+---------------------------------------------|
          |    í &Y1     | Break does not empty buffer and is sent     |
          |              | immediately.                                |
          |--------------+---------------------------------------------|
          |     &Y2      | Break does not empty buffer and is sent in  |
          |              | data stream.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CALL CHARGE - B1                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S120? S121? [cmds]                |
          |--------------+---------------------------------------------|
          | Default:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Range:       | 0-65535                                     |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | These registers store the accumulated call  |
          |              | charge for the first ISDN channel. S120     |
          |              | stores the Most Significant Byte, and S121  |
          |              | stores the Least Significant Byte. To       |
          |              | obtain the correct value, use S120 * 256 +  |
          |              | S121.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CALL CHARGE - B2                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S122? S123? [cmds]                |
          |--------------+---------------------------------------------|
          | Default:     | Read-only                                   |
          |--------------+---------------------------------------------|
          | Range:       | 0-65535                                     |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | These registers store the accumulated call  |
          |              | charge for the second ISDN channel. S122    |
          |              | stores the Most Significant Byte, and S123  |
          |              | stores the Least Significant Byte. To       |
          |              | obtain the correct value, use S122 * 256 +  |
          |              | S123.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CALL RESUME                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CRn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Resumes the call with call number n.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CALL SUSPEND                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CSn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Suspends the current call with call number  |
          |              | n.                                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CALLBACK NUMBER DISPLAY                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *VC [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Displays the table of callback numbers.     |
          |--------------+---------------------------------------------|
          | Note:        | The supervisor password must be entered to  |
          |              | execute this command.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CALLER ID INFORMATION                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *T [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays the last caller ID information.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CALLER ID SILENCE DELAY                   |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S45=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 87                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 20ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Time period in which Caller ID silence      |
          |              | detection is disabled.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CALLER ID SILENCE DETECTION                 |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S46=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 3                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 20ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Time period for which silence must be       |
          |              | detected for Called ID information to be    |
          |              | processed.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       CELLULAR MODE                        |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S49=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 9                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls cellular transmission attenuation  |
          |              | and cellular function.                      |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 3 -  |  0000 | Sets cellular transmit attenuation level to |
          |  0   |       | -9dBm.                                      |
          |      |   ... |                                             |
          |      |       | ...                                         |
          |      |     í |                                             |
          |      |  1001 | Sets cellular transmit attenuation level to |
          |      |       | -18dBm.                                     |
          |      |   ... |                                             |
          |      |       | ...                                         |
          |      |  1111 |                                             |
          |      |       | Sets cellular transmit attenuation level to |
          |      |       | -24dBm.                                     |
          |------+-------+---------------------------------------------|
          | 6-4  |   000 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Cellular mode over phone lines.             |
          |      |       |                                             |
          |      |     1 | Cellular mode through cellular phone.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CHARACTER LENGTH                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets length of character.                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *C0     | Set 10-bit character.                       |
          |--------------+---------------------------------------------|
          |     *C1      | Set 11-bit character.                       |
          |--------------+---------------------------------------------|
          |     *C2      | Set 9-bit character.                        |
          |--------------+---------------------------------------------|
          |     *C3      | Set 8-bit character.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     COMMAND MODE TYPE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *In [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the command set the modem will use. |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *I0     | AT command set enabled.                     |
          |--------------+---------------------------------------------|
          |     *I1      | V.25bis command set enabled.                |
          |--------------+---------------------------------------------|
          |     *I2      | Dumb terminal mode, all command sets        |
          |              | disabled.                                   |
          |------------------------------------------------------------|
          |      Note: To leave dumb terminal mode, front panel menu   |
          |      must be used.                                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           COMPRESSION AND ERROR CORRECTION MODE            |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Kn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the type of error correction and    |
          |              | data compression used over switched-line    |
          |              | and ISDN connections.                       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &K0      | Error correction and compression disabled   |
          |              | for switched-line calls.                    |
          |--------------+---------------------------------------------|
          |     &K1      | MNP4 enabled for switched-line calls.       |
          |--------------+---------------------------------------------|
          |     &K2      | MNP5 enabled for switched-line calls.       |
          |--------------+---------------------------------------------|
          |     &K3      | V.42 and MNP4 enabled for switched-line     |
          |              | calls.                                      |
          |--------------+---------------------------------------------|
          |    í &K4     | V.42bis and MNP5 enabled for switched-line  |
          |              | calls.                                      |
          |--------------+---------------------------------------------|
          |     &K00     | Error correction and compression disabled   |
          |              | for ISDN calls.                             |
          |--------------+---------------------------------------------|
          |     &K11     | Reliable PPP error correction enabled for   |
          |              | ISDN calls.                                 |
          |--------------+---------------------------------------------|
          |     &K33     | STAC LZS compression enabled for ISDN       |
          |              | calls.                                      |
          |--------------+---------------------------------------------|
          |     &K44     | V.42bis enabled for ISDN calls.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CONFIGURATION PROFILES                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Displays active and stored configuration    |
          |              | profiles.                                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &V0      | Displays current settings.                  |
          |--------------+---------------------------------------------|
          |     &V1      | Displays profile 0.                         |
          |--------------+---------------------------------------------|
          |     &V2      | Displays profile 1.                         |
          |--------------+---------------------------------------------|
          |     &V3      | Displays profile 2.                         |
          |--------------+---------------------------------------------|
          |     &V4      | Displays profile 3.                         |
          |--------------+---------------------------------------------|
          |     &V5      | Displays factory defaults.                  |
          |--------------+---------------------------------------------|
          |     &V6      | Displays A/B adapter’s settings.            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               DEFAULT FALLBACK PHONE NUMBER                |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S30=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-39                                        |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the default phone number the phone     |
          |              | will dial when leased line goes down to     |
          |              | memory location n. Setting S30 to 0 will    |
          |              | disable this feature.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DEFAULT PHONE NUMBER                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Dn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-39                                        |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the default phone number to memory     |
          |              | location n.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DEFAULT PHONE NUMBER                    |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S29=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-40                                        |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the default phone number to memory     |
          |              | location n.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DES KEY SET                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CKxxxx [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the key to be used for DES encryption. |
          |              | The key must be between 15 and 65           |
          |              | characters.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DIAGNOSTICS                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CGn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Performs modem diagnostics.                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                            DIAL                            |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] D<#> [; cmds]                     |
          |              |                                             |
          |              | AT [cmds] DYaNb<#>/Zcxxxx/ [; cmds]         |
          |              |                                             |
          |              | AT [cmds] DA/Zcxxxx/ [; cmds]               |
          |--------------+---------------------------------------------|
          | Description: | Dials telephone number according to any     |
          |              | modifiers included in the string.           |
          |--------------+---------------------------------------------|
          |   Modifier   |                  Function                   |
          |--------------+---------------------------------------------|
          |      DP      | Dial with device specified in &O.           |
          |--------------+---------------------------------------------|
          |      DR      | Dial in answer mode.                        |
          |--------------+---------------------------------------------|
          |     DS=n     | Number in memory location n dialed.         |
          |--------------+---------------------------------------------|
          |      DT      | Dial with device specified in &O.           |
          |--------------+---------------------------------------------|
          |      DW      | Dialing resumed following dial tone         |
          |              | detection.                                  |
          |--------------+---------------------------------------------|
          |      D,      | Dialing paused for amount of time specified |
          |              | in S8 register.                             |
          |--------------+---------------------------------------------|
          |      D!      | Flash function initiated. Modem commanded   |
          |              | to go on-hook for specified time.           |
          |--------------+---------------------------------------------|
          |      D@      | Modem waits for a ring-back signal followed |
          |              | by silence up to the time specified in S7   |
          |              | prior to executing the rest of the dial     |
          |              | string.                                     |
          |--------------+---------------------------------------------|
          |      D;      | Modem returned to idle state after dialing. |
          |              | The semicolon can only be placed at the end |
          |              | of the dial command.                        |
          |--------------+---------------------------------------------|
          |      DB      | Dial with A/B adapter.                      |
          |--------------+---------------------------------------------|
          |      DM      | Dial with fax/modem.                        |
          |--------------+---------------------------------------------|
          |      DI      | Dial with ISDN.                             |
          |--------------+---------------------------------------------|
          |      Y0      | Unknown number locality.                    |
          |--------------+---------------------------------------------|
          |      Y1      | International number.                       |
          |--------------+---------------------------------------------|
          |      Y2      | National number.                            |
          |--------------+---------------------------------------------|
          |      Y3      | Network number.                             |
          |--------------+---------------------------------------------|
          |      Y4      | Subscriber number.                          |
          |--------------+---------------------------------------------|
          |      Y6      | Abbreviated number.                         |
          |--------------+---------------------------------------------|
          |      N0      | Unknown number type.                        |
          |--------------+---------------------------------------------|
          |      N1      | ISDN type number.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DIAL (CON’T)                        |
          |------------------------------------------------------------|
          | Modifier |                    Function                     |
          |----------+-------------------------------------------------|
          |    N3    | X.121 data type number.                         |
          |----------+-------------------------------------------------|
          |    N8    | National standard number.                       |
          |----------+-------------------------------------------------|
          |    N9    | Private number.                                 |
          |----------+-------------------------------------------------|
          |    Z0    | NSAP subaddress of IA5 characters, AFI=0x50.    |
          |----------+-------------------------------------------------|
          |    Z1    | NSAP subaddress of IA5 characters, AFI is user  |
          |          | specified.                                      |
          |----------+-------------------------------------------------|
          |    Z2    | User specified subaddress of IA5 characters.    |
          |----------+-------------------------------------------------|
          |    Z3    | User specified subaddress of BCD characters.    |
          |----------+-------------------------------------------------|
          |    A     | Do not specify ISDN number.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DIALING MODE DEFAULT                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &On [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects which mode the modem will originate |
          |              | calls in by default.                        |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &O0      | Originate calls in fax/data mode.           |
          |--------------+---------------------------------------------|
          |     &O2      | Originate calls in ISDN mode.               |
          |--------------+---------------------------------------------|
          |     &O3      | Originate calls in A/B adapter mode.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DIAL BACKUP                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the memory location for the dial    |
          |              | backup. *B or *B0 will disable dial backup. |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DISPLAY CALL CHARGE                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CH? [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Displays the number of charge units for the |
          |              | last call.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DISPLAY PROTOCOL ANALYZER                  |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] C$ [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays the results and interpretation of  |
          |              | the protocol analyzer.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                DISPLAY STORED PHONE NUMBERS                |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Z? [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Displays all stored phone numbers.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DTE CHANNEL                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S88=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects which DTE channel is active.        |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S88=0     | Fax/data DTE channel active.                |
          |--------------+---------------------------------------------|
          |    S88=1     | ISDN 1 DTE channel active.                  |
          |--------------+---------------------------------------------|
          |    S88=2     | ISDN 2 DTE channel active.                  |
          |--------------+---------------------------------------------|
          |    S88=3     | A/B adapter DTE channel active.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                DYNAMIC BANDWIDTH ALLOCATION                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CEn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects whether dynamic bandwidth           |
          |              | allocation will be used to allow            |
          |              | simultaneous data and voice calls.          |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     CE0      | Dynamic bandwidth allocation disabled.      |
          |--------------+---------------------------------------------|
          |    í CE1     | Dynamic bandwidth allocation enabled.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               ENDPOINT DISCRIMINATOR ADDRESS               |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] EPD=<a,b,c,d...s,t> [cmds]        |
          |--------------+---------------------------------------------|
          | Example:     | ATEPD=<284,254,124,62,5>                    |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the endpoint discriminator address for |
          |              | multipoint PPP systems. Up to twenty        |
          |              | numbers may be specified.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                ENDPOINT DISCRIMINATOR CLASS                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S85=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the endpoint discriminator class for   |
          |              | multipoint PPP systems.                     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S85=0    | Null class.                                 |
          |--------------+---------------------------------------------|
          |    S85=1     | User-defined address.                       |
          |--------------+---------------------------------------------|
          |    S85=2     | IP address.                                 |
          |--------------+---------------------------------------------|
          |    S85=3     | 802.3 MAC address.                          |
          |--------------+---------------------------------------------|
          |    S85=4     | PPP magic number block.                     |
          |--------------+---------------------------------------------|
          |    S85=5     | Public Switched Network Directory number.   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   ERROR CONTROL FAILURE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *En [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Configures the modem’s behavior if an       |
          |              | error-connecting connection cannot be made. |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *E0     | Modem will keep non-error-correcting        |
          |              | connection.                                 |
          |--------------+---------------------------------------------|
          |     *E1      | Modem will disconnect non-error-correcting  |
          |              | connection.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       EXTENDED RING                        |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S51=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Sets operation of modem when it detects     |
          |              | extended rings and fax rings.               |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |    00 | Extended ring tone detection disabled.      |
          |      |       |                                             |
          |      |    01 | Extended ring tone returns RING n twice.    |
          |      |       |                                             |
          |      |    10 | Extended ring tone returns RING n four      |
          |      |       | times.                                      |
          |      |    11 |                                             |
          |      |       | Extended ring tone returns RING n six       |
          |      |       | times.                                      |
          |------+-------+---------------------------------------------|
          | 3, 2 |    00 | DTMF detection disabled.                    |
          |      |       |                                             |
          |      |    01 | DTMF tone returns RING n twice.             |
          |      |       |                                             |
          |      |    10 | DTMF tone returns RING <digit>.             |
          |------+-------+---------------------------------------------|
          | 5, 4 |    00 | Fax ring tone detection disabled.           |
          |      |       |                                             |
          |      |    01 | Fax ring tone returns RING.                 |
          |      |       |                                             |
          |      |    10 | Fax ring tone returns RING 1.               |
          |      |       |                                             |
          |      |    11 | Fax ring tone returns RING 2.               |
          |------+-------+---------------------------------------------|
          | 7, 6 |    00 | Data ring tone detection disabled.          |
          |      |       |                                             |
          |      |    01 | Data ring tone returns RING.                |
          |      |       |                                             |
          |      |    10 | Data ring tone returns RING 1.              |
          |      |       |                                             |
          |      |    11 | Data ring tone returns RING 3.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FAX CONNECT                         |
          |------------------------------------------------------------|
          | Type:        | Result code                                 |
          |--------------+---------------------------------------------|
          | Format:      | CONNECT FAX/SnnnnVaTbRcLxCyP<#>             |
          |--------------+---------------------------------------------|
          | Example:     | CONNECT FAX/S1440V1T1R0L1C0P(303) 555-1212  |
          |--------------+---------------------------------------------|
          | Description: | Returned by the modem when a successful fax |
          |              | connection has been made.                   |
          |--------------+---------------------------------------------|
          |   Response   |                   Meaning                   |
          |--------------+---------------------------------------------|
          |    S2400     | 2400bps connection.                         |
          |--------------+---------------------------------------------|
          |    S4800     | 4800bps connection.                         |
          |--------------+---------------------------------------------|
          |    S7200     | 7200bps connection.                         |
          |--------------+---------------------------------------------|
          |    S9600     | 9600bps connection.                         |
          |--------------+---------------------------------------------|
          |    S1200     | 12Kbps connection.                          |
          |--------------+---------------------------------------------|
          |    S1440     | 14.4Kbps connection.                        |
          |--------------+---------------------------------------------|
          |      V0      | Normal vertical resolution.                 |
          |--------------+---------------------------------------------|
          |      V1      | High vertical resolution.                   |
          |--------------+---------------------------------------------|
          |      T0      | One-dimensional coding scheme.              |
          |--------------+---------------------------------------------|
          |      T1      | Two-dimensional coding scheme.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    FAX CONNECT (CON’T)                     |
          |------------------------------------------------------------|
          | Response |                     Meaning                     |
          |----------+-------------------------------------------------|
          |    R0    | 215mm wide (1728 pels).                         |
          |----------+-------------------------------------------------|
          |    R1    | 255mm wide (2048 pels).                         |
          |----------+-------------------------------------------------|
          |    R2    | 303mm wide (2432 pels).                         |
          |----------+-------------------------------------------------|
          |    L0    | A4 length (297mm).                              |
          |----------+-------------------------------------------------|
          |    L1    | B4 length (364mm).                              |
          |----------+-------------------------------------------------|
          |    L2    | Unlimited length.                               |
          |----------+-------------------------------------------------|
          |    C0    | 20ms minimum per line.                          |
          |----------+-------------------------------------------------|
          |    C1    | 5ms minimum per line.                           |
          |----------+-------------------------------------------------|
          |    C2    | 10ms minimum per line.                          |
          |----------+-------------------------------------------------|
          |    C3    | 20ms minimum per normal-resolution line, 10ms   |
          |          | minimum per fine-resolution line.               |
          |----------+-------------------------------------------------|
          |    C4    | 40ms minimum per line.                          |
          |----------+-------------------------------------------------|
          |    C5    | 40ms minimum per normal-resolution line, 20ms   |
          |          | minimum per fine-resolution line.               |
          |----------+-------------------------------------------------|
          |    C6    | 10ms minimum per normal-resolution line, 5ms    |
          |          | minimum per fine-resolution line.               |
          |----------+-------------------------------------------------|
          |    C7    | No minimum time required.                       |
          |----------+-------------------------------------------------|
          |   P<#>   | Remote fax station number.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       FAX DISCONNECT                       |
          |------------------------------------------------------------|
          | Type:        | Result code                                 |
          |--------------+---------------------------------------------|
          | Format:      | DISCONNECTn P<#>                            |
          |--------------+---------------------------------------------|
          | Example:     | DISCONNECT1P(303) 555-1212                  |
          |--------------+---------------------------------------------|
          | Description: | Returned by the modem when the fax          |
          |              | connection has been broken.                 |
          |--------------+---------------------------------------------|
          |   Response   |                   Meaning                   |
          |--------------+---------------------------------------------|
          | DISCONNECT0  | Remote modem has confirmed disconnection.   |
          |--------------+---------------------------------------------|
          | DISCONNECT1  | Remote modem has not confirmed              |
          |              | disconnection.                              |
          |--------------+---------------------------------------------|
          |     P<#>     | Remote fax station number.                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FAX ENCODING                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #Tn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the encoding scheme of transmitted     |
          |              | faxes.                                      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     #T0      | Sets one-dimensional encoding.              |
          |--------------+---------------------------------------------|
          |     #T1      | Sets two-dimensional encoding.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         FAX LENGTH                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #Ln [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of transmitted faxes.       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     #L0      | A4 length (297mm).                          |
          |--------------+---------------------------------------------|
          |     #L1      | B4 length (364mm).                          |
          |--------------+---------------------------------------------|
          |     #L2      | Unlimited length.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          FAX MINIMUM SCAN LINE TRANSMISSION TIME           |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the minimum time required for          |
          |              | transmission of one scan line.              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     #C0      | 20ms minimum per line.                      |
          |--------------+---------------------------------------------|
          |     #C1      | 5ms minimum per line.                       |
          |--------------+---------------------------------------------|
          |     #C2      | 10ms minimum per line.                      |
          |--------------+---------------------------------------------|
          |     #C3      | 20ms minimum per normal-resolution line,    |
          |              | 10ms minimum per fine-resolution line.      |
          |--------------+---------------------------------------------|
          |     #C4      | 40ms minimum per line.                      |
          |--------------+---------------------------------------------|
          |     #C5      | 40ms minimum per normal-resolution line,    |
          |              | 20ms minimum per fine-resolution line.      |
          |--------------+---------------------------------------------|
          |     #C6      | 10ms minimum per normal-resolution line,    |
          |              | 5ms minimum per fine-resolution line.       |
          |--------------+---------------------------------------------|
          |     #C7      | No minimum time required.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          FAX MODE                          |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #F [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Sets modem in fax mode.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FAX RECEIVE DEVICE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +FZF=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Selects where the modem will store and send |
          |              | received fax and modem data.                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    +FZF=0    | Send fax data to printer and hang up if     |
          |              | modem data.                                 |
          |--------------+---------------------------------------------|
          |    +FZF=1    | Send fax data to printer and modem data to  |
          |              | serial port.                                |
          |--------------+---------------------------------------------|
          |    +FZF=2    | Send fax data to DRAM and printer, and hang |
          |              | up if modem data.                           |
          |--------------+---------------------------------------------|
          |    +FZF=3    | Send fax data to DRAM and hang up if modem  |
          |              | data.                                       |
          |--------------+---------------------------------------------|
          |    +FZF=4    | Send fax data to DRAM and printer, and hang |
          |              | up if modem data.                           |
          |--------------+---------------------------------------------|
          |    +FZF=5    | Send fax data to DRAM and modem data to     |
          |              | serial port.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FAX RECEIVE DEVICE                     |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S71=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects where the modem will store and send |
          |              | received fax and modem data.                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S71=0     | Send fax data to printer and hang up if     |
          |              | modem data.                                 |
          |--------------+---------------------------------------------|
          |    S71=1     | Send fax data to printer and modem data to  |
          |              | serial port.                                |
          |--------------+---------------------------------------------|
          |    S71=2     | Send fax data to DRAM and printer, and hang |
          |              | up if modem data.                           |
          |--------------+---------------------------------------------|
          |    S71=3     | Send fax data to DRAM and hang up if modem  |
          |              | data.                                       |
          |--------------+---------------------------------------------|
          |    S71=4     | Send fax data to DRAM and printer, and hang |
          |              | up if modem data.                           |
          |--------------+---------------------------------------------|
          |    S71=5     | Send fax data to DRAM and modem data to     |
          |              | serial port.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      FAX RECEIVE MODE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Configures the operation of the modem when  |
          |              | receiving faxes.                            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í #B0     | Fax data follows immediately after          |
          |              | connection parameters.                      |
          |--------------+---------------------------------------------|
          |     #B1      | Fax data is separated from connection       |
          |              | parameters by DC2 (ASCII 24) character.     |
          |--------------+---------------------------------------------|
          |     #B2      | Fax data is not transmitted until receiving |
          |              | modem requests it.                          |
          |--------------+---------------------------------------------|
          |     #B3      | Displays the fax ring pattern               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       FAX RESOLUTION                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the vertical resolution of transmitted |
          |              | faxes.                                      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     #V0      | Sets normal resolution.                     |
          |--------------+---------------------------------------------|
          |     #V1      | Sets high resolution.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  FAX STATION PHONE NUMBER                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #P<#> [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Sets what the modem will report as its      |
          |              | phone number to the remote fax machine.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   FAX/VOICE FLOW CONTROL                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +FLO=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Selects the type of flow control to use for |
          |              | voice/fax modes.                            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    +FLO=0    | Flow control disabled.                      |
          |--------------+---------------------------------------------|
          |    +FLO=1    | Software flow control enabled.              |
          |--------------+---------------------------------------------|
          |    +FLO=2    | Hardware flow control enabled.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         FAX WIDTH                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the width of transmitted faxes.        |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     #R0      | 215mm wide (1728 pixels).                   |
          |--------------+---------------------------------------------|
          |     #R1      | 255mm wide (2048 pixels).                   |
          |--------------+---------------------------------------------|
          |     #R2      | 303mm wide (2432 pixels).                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FIRMWARE DOWNLOAD                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] UPX                               |
          |--------------+---------------------------------------------|
          | Description: | Begins an XMODEM download to the modem      |
          |              | firmware.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FLOW CONTROL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Hn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the type of flow control to use.    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &H0      | Flow control disabled.                      |
          |--------------+---------------------------------------------|
          |    í &H3     | Hardware flow control enabled.              |
          |--------------+---------------------------------------------|
          |     &H4      | Software flow control enabled.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        HELP SCREENS                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT <prefix>$                                |
          |--------------+---------------------------------------------|
          | Example:     | AT *$<CR>                                   |
          |--------------+---------------------------------------------|
          | Description: | Shows command help screens for all commands |
          |              | beginning with the given prefix, or no      |
          |              | prefix if none is given.                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      $       | Shows ATx help screen.                      |
          |--------------+---------------------------------------------|
          |      &$      | Shows AT&x help screen.                     |
          |--------------+---------------------------------------------|
          |      *$      | Shows AT*x help screen.                     |
          |--------------+---------------------------------------------|
          |      S$      | Shows S-register help screen.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      HOOK FLASH TIME                       |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S56=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 10ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the amount of time the modem goes   |
          |              | on-hook for a hook flash.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S50=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 10 seconds                                  |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem does |
          |              | not receive information before it           |
          |              | disconnects.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   ISDN BUNDLE CONNECTION                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Jn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects when the modem will attempt to make |
          |              | a two-channel bundle connection.            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &J0     | Bundle connections disabled.                |
          |--------------+---------------------------------------------|
          |     &J1      | Bundle connections enabled on answer only.  |
          |--------------+---------------------------------------------|
          |     &J2      | Bundle connections enabled on originate     |
          |              | only.                                       |
          |--------------+---------------------------------------------|
          |     &J3      | Bundle connections enabled.                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    ISDN FEATURE REQUEST                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CFn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Requests the feature assigned to ISDN       |
          |              | button n. These features are configured by  |
          |              | the service provider at the user’s request. |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      ISDN PACKET SIZE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CLn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 252                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-2048                                      |
          |--------------+---------------------------------------------|
          | Unit:        | 1 byte                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum packet size for            |
          |              | transmitting data on the ISDN line.         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   ISDN SPEED - B-CHANNEL                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &En [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the base speed that will be used    |
          |              | for ISDN B-channel communications.          |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &E0     | 64Kbps base speed.                          |
          |--------------+---------------------------------------------|
          |     &E1      | 56Kbps base speed.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 LEASED-LINE AUTO-HANDSHAKE                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects which modem performs the            |
          |              | auto-handshaking.                           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *M0     | Originating modem auto-handshakes.          |
          |--------------+---------------------------------------------|
          |     *M1      | Answering modem auto-handshakes.            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   LEASED LINE RETRY TIME                   |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S34=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 30                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | When leased line is down, sets the time     |
          |              | between checks on whether it is functioning |
          |              | again.                                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            LEASED-LINE TRANSMISSION ATTENUATION            |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Pn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 9                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 15                                      |
          |--------------+---------------------------------------------|
          | Unit:        | -1 dBm                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the attenuation for transmission when  |
          |              | in leased-line mode.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            LOCAL/REMOTE CONFIGURATION SELECTION            |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S37=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 127                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects local and remote profiles for       |
          |              | copying.                                    |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  2,  | í 000 | Select local profile 0.                     |
          | 1, 0 |       |                                             |
          |      |   001 | Select local profile 1.                     |
          |      |       |                                             |
          |      |   010 | Select local profile 2.                     |
          |      |       |                                             |
          |      |   011 | Select local profile 3.                     |
          |      |       |                                             |
          |      |   100 | Select current local configuration.         |
          |      |       |                                             |
          |      |   101 | Select local factory defaults.              |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Not used.                                   |
          |------+-------+---------------------------------------------|
          |  6,  | í 000 | Select remote profile 0.                    |
          | 5, 4 |       |                                             |
          |      |   001 | Select remote profile 1.                    |
          |      |       |                                             |
          |      |   010 | Select remote profile 2.                    |
          |      |       |                                             |
          |      |   011 | Select remote profile 3.                    |
          |      |       |                                             |
          |      |   100 | Select current remote configuration.        |
          |      |       |                                             |
          |      |   101 | Select remote factory defaults.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  LOCAL SERIAL PORT SPEED                   |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S20=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 46                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets serial port speed.                     |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      0       | Sets 230.4Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      1       | Sets 115.2Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      2       | Sets 76.8Kbps speed.                        |
          |--------------+---------------------------------------------|
          |     í 3      | Sets 57.6Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      4       | Sets 38.4Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      5       | Sets 19.2Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      6       | Sets 16.8Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      7       | Sets 14.4Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      8       | Sets 12Kbps speed.                          |
          |--------------+---------------------------------------------|
          |      9       | Sets 9600bps speed.                         |
          |--------------+---------------------------------------------|
          |      10      | Sets 7200bps speed.                         |
          |--------------+---------------------------------------------|
          |      11      | Sets 4800bps speed.                         |
          |--------------+---------------------------------------------|
          |      12      | Sets 2400bps speed.                         |
          |--------------+---------------------------------------------|
          |      13      | Sets 1200bps speed.                         |
          |--------------+---------------------------------------------|
          |      14      | Sets 460.8Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      15      | Sets 300bps speed.                          |
          |--------------+---------------------------------------------|
          |      16      | Sets 307.2Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      17      | Sets 153.6Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      18      | Sets 102.4Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      20      | Sets 61.4Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      21      | Sets 51.2Kbps speed.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              LOCAL SERIAL PORT SPEED (CON’T)               |
          |------------------------------------------------------------|
          |   Value    |                    Meaning                    |
          |------------+-----------------------------------------------|
          |     22     | Sets 624Kbps speed.                           |
          |------------+-----------------------------------------------|
          |     24     | Sets 124.8Kbps speed.                         |
          |------------+-----------------------------------------------|
          |     25     | Sets 62.4Kbps speed.                          |
          |------------+-----------------------------------------------|
          |     26     | Sets 41.6Kbps speed.                          |
          |------------+-----------------------------------------------|
          |     28     | Sets 24.9Kbps speed.                          |
          |------------+-----------------------------------------------|
          |     29     | Sets 20.8Kbps speed.                          |
          |------------+-----------------------------------------------|
          |     46     | Sets 921.6Kbps speed.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           LOCAL SERIAL PORT SPEED ON AUTO-ANSWER           |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S18=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 46                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets serial port speed when modem           |
          |              | auto-answers an incoming call.              |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |     í 0      | Auto-detect speed.                          |
          |--------------+---------------------------------------------|
          |      1       | Sets 115.2Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      2       | Sets 76.8Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      3       | Sets 57.6Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      4       | Sets 38.4Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      5       | Sets 19.2Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      6       | Sets 16.8Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      7       | Sets 14.4Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      8       | Sets 12Kbps speed.                          |
          |--------------+---------------------------------------------|
          |      9       | Sets 9600bps speed.                         |
          |--------------+---------------------------------------------|
          |      10      | Sets 7200bps speed.                         |
          |--------------+---------------------------------------------|
          |      11      | Sets 4800bps speed.                         |
          |--------------+---------------------------------------------|
          |      12      | Sets 2400bps speed.                         |
          |--------------+---------------------------------------------|
          |      13      | Sets 1200bps speed.                         |
          |--------------+---------------------------------------------|
          |      14      | Sets 460.8Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      15      | Sets 300bps speed.                          |
          |--------------+---------------------------------------------|
          |      16      | Sets 307.2Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      17      | Sets 153.6Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      18      | Sets 102.4Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      20      | Sets 61.4Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      21      | Sets 51.2Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      22      | Sets 624Kbps speed.                         |
          |--------------+---------------------------------------------|
          |      24      | Sets 124.8Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      25      | Sets 62.4Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      26      | Sets 41.6Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      28      | Sets 24.9Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      29      | Sets 20.8Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      32      | Sets 230.4Kbps speed.                       |
          |--------------+---------------------------------------------|
          |      46      | Sets 921.6Kbps speed.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |    LOCAL SERIAL PORT SPEED ON AUTO-ANSWER (U-1496 MODE)    |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S18=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 2                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 15                                      |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets serial port speed when modem           |
          |              | auto-answers an incoming call.              |
          |--------------+---------------------------------------------|
          | Note:        | This table should be used when in U-1496    |
          |              | compatible mode only.                       |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      0       | Sets 76.8Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      1       | Sets 57.6Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      2       | Sets 38.4Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      3       | Sets 19.2Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      4       | Sets 16.8Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      5       | Sets 14.4Kbps speed.                        |
          |--------------+---------------------------------------------|
          |      6       | Sets 12Kbps speed.                          |
          |--------------+---------------------------------------------|
          |      7       | Sets 9600bps speed.                         |
          |--------------+---------------------------------------------|
          |      8       | Sets 7200bps speed.                         |
          |--------------+---------------------------------------------|
          |      9       | Sets 4800bps speed.                         |
          |--------------+---------------------------------------------|
          |      10      | Sets 3600bps speed.                         |
          |--------------+---------------------------------------------|
          |      11      | Sets 2400bps speed.                         |
          |--------------+---------------------------------------------|
          |      12      | Sets 1800bps speed.                         |
          |--------------+---------------------------------------------|
          |      13      | Sets 1200bps speed.                         |
          |--------------+---------------------------------------------|
          |      14      | Sets 600bps speed.                          |
          |--------------+---------------------------------------------|
          |      15      | Sets 300bps speed.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         LOOPBACK 4                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CPn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the Loopback 4 function.            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í CP0     | Loopback 4 disabled.                        |
          |--------------+---------------------------------------------|
          |     CP1      | Loopback 4 enabled.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    MANUFACTURER CAPTURE                    |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S13=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0, 2                                        |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | Selects whether to attempt to capture the   |
          |              | manufacturer of the other modem during      |
          |              | handshaking.                                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S13=0    | Manufacturer capture disabled.              |
          |--------------+---------------------------------------------|
          |    S13=2     | Manufacturer capture enabled.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       MODE SELECTION                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +FCLASS=n                         |
          |--------------+---------------------------------------------|
          | Description: | Sets what mode the modem will operate in.   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |  +FCLASS=0   | Data mode.                                  |
          |--------------+---------------------------------------------|
          |  +FCLASS=1   | Class 1 fax mode.                           |
          |--------------+---------------------------------------------|
          |  +FCLASS=2   | Class 2 fax mode.                           |
          |--------------+---------------------------------------------|
          | +FCLASS=2.0  | Class 2.0 fax mode.                         |
          |--------------+---------------------------------------------|
          |  +FCLASS=6   | ZyXELfax mode.                              |
          |--------------+---------------------------------------------|
          |  +FCLASS=8   | Voice mode.                                 |
          |--------------+---------------------------------------------|
          |  +FCLASS=Z   | Parallel port fax mode. Sends fax data to   |
          |              | printer on parallel port.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       MODE SELECTION                       |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S85=n                             |
          |--------------+---------------------------------------------|
          | Description: | Sets what mode the modem will operate in.   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S85=0     | Data mode.                                  |
          |--------------+---------------------------------------------|
          |    S85=1     | Class 1 fax mode.                           |
          |--------------+---------------------------------------------|
          |    S85=2     | Class 2 fax mode.                           |
          |--------------+---------------------------------------------|
          |    S85=6     | ZyXELfax mode.                              |
          |--------------+---------------------------------------------|
          |    S85=8     | Voice mode.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         PANEL KEY                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Ln [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Locks the front panel key.                  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *L0     | Key unlocked.                               |
          |--------------+---------------------------------------------|
          |     *L1      | Key locked.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  PASSWORD FOR SUPERVISOR                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *HS                               |
          |--------------+---------------------------------------------|
          | Description: | Changes supervisory password. Requires      |
          |              | current supervisory password.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       PASSWORD TABLE                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Hn                               |
          |--------------+---------------------------------------------|
          | Description: | Changes password for phone book entry n.    |
          |              | Requires supervisory password.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   PASSWORD TABLE DISPLAY                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *V [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays the password table.                |
          |--------------+---------------------------------------------|
          | Note:        | The supervisor password must be entered to  |
          |              | execute this command.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              PREFIX FOR INTERNATIONAL NUMBERS              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CIxxxx [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the prefix that the modem will prepend |
          |              | to international numbers when reporting     |
          |              | them in result codes.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              PREFIX FOR LONG-DISTANCE NUMBERS              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CNxxxx [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the prefix that the modem will prepend |
          |              | to long-distance (but not international)    |
          |              | numbers when reporting them in result       |
          |              | codes.                                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                POOR SIGNAL QUALITY REACTION                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Qn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Configures the modem’s reaction to poor     |
          |              | signal quality.                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     *Q0      | Modem does nothing during poor signal       |
          |              | quality.                                    |
          |--------------+---------------------------------------------|
          |     *Q1      | Modem retrains during poor signal quality.  |
          |--------------+---------------------------------------------|
          |    í *Q2     | Modem fall-back during poor signal quality, |
          |              | and fall-forward when signal improves.      |
          |--------------+---------------------------------------------|
          |     *Q3      | Modem will disconnect during poor signal    |
          |              | quality.                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  PPP IDLE OUT PREVENTION                   |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S124=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sends an empty packet to avoid              |
          |              | disconnection on PPP connections.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       PRINT OPTIONS                        |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S73=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 24                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 47                                      |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Sets options for printer.                   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Printer connected to parallel port.         |
          |      |       |                                             |
          |      |     1 | Printer connected to serial port.           |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Fast PCL mode enabled.                      |
          |      |       |                                             |
          |      |     1 | Fast PCL mode disabled.                     |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Set printer resolution to 300dpi.           |
          |      |       |                                             |
          |      |     1 | Set printer resolution to 150dpi.           |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Do not resize faxes to fit page.            |
          |      |       |                                             |
          |      |   í 1 | Resize faxes to fit page.                   |
          |------+-------+---------------------------------------------|
          | 5, 4 |  í 00 | Select letter-size paper.                   |
          |      |       |                                             |
          |      |    01 | Select legal-size paper.                    |
          |      |       |                                             |
          |      |    10 | Select A4-size paper.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     PRINT STORED FAXES                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +FZP=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Prints faxes that have been stored in DRAM  |
          |              | but not printed.                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     PRINTER PAPER SIZE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +FZS=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the paper size n the printer.          |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í +FZS=0   | Select letter-size paper.                   |
          |--------------+---------------------------------------------|
          |    +FZS=1    | Select legal-size paper.                    |
          |--------------+---------------------------------------------|
          |    +FZS=2    | Select A4-size paper.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     PRINTER RESOLUTION                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +FZR=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the resolution to print on the         |
          |              | printer.                                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í +FZR=0   | Set printer resolution to 300dpi.           |
          |--------------+---------------------------------------------|
          |    +FZR=1    | Set printer resolution to 150dpi.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        PRINTER TYPE                        |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S72=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 4                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Sets options for printer.                   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Use Deskjet 500 and Laserjet II series PCL. |
          |      |       |                                             |
          |      |     1 | Use Laserjet III series and higher PCL.     |
          |------+-------+---------------------------------------------|
          |  1   |     0 | PCL mode enabled.                           |
          |      |       |                                             |
          |      |     1 | PostScript Level I mode enabled.            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     PROTOCOL ANALYZER                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CT [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Clears modem buffers and starts the         |
          |              | protocol analyzer.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           PROTOCOL ANALYZER - CAPTURE B-CHANNEL            |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CBn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects protocol capturing on the B         |
          |              | channel.                                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     CB0      | B-channel protocol capturing disabled.      |
          |--------------+---------------------------------------------|
          |     CB1      | B-channel protocol capturing enabled.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           PROTOCOL ANALYZER - CAPTURE D-CHANNEL            |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CDn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects protocol capturing on the D         |
          |              | channel.                                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     CD0      | D-channel protocol capturing disabled.      |
          |--------------+---------------------------------------------|
          |     CD1      | D-channel protocol capturing enabled.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             PROTOCOL ANALYZER - CAPTURE SERIAL             |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CCn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects serial protocol capturing.          |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     CC0      | Serial protocol capturing disabled.         |
          |--------------+---------------------------------------------|
          |     CC1      | Serial protocol capturing enabled.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              PROTOCOL/SPEED - ISDN B-CHANNEL               |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Bnn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the protocol and speed that will be |
          |              | used for ISDN B-channel communications.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     B00      | Use X.75 transparent.                       |
          |--------------+---------------------------------------------|
          |     B01      | Use X.75 with T.70.                         |
          |--------------+---------------------------------------------|
          |     B02      | Use X.75 with ISO8208.                      |
          |--------------+---------------------------------------------|
          |     B03      | Use X.75 with T.90.                         |
          |--------------+---------------------------------------------|
          |     B04      | Use X.75 with BTX.                          |
          |--------------+---------------------------------------------|
          |     B10      | Use V.110 autospeed.                        |
          |--------------+---------------------------------------------|
          |     B11      | Use V.110 at 64Kbps in synchronous mode.    |
          |--------------+---------------------------------------------|
          |     B13      | Use V.110 at 2400bps.                       |
          |--------------+---------------------------------------------|
          |     B14      | Use V.110 at 4800bps.                       |
          |--------------+---------------------------------------------|
          |     B15      | Use V.110 at 9600bps.                       |
          |--------------+---------------------------------------------|
          |     B16      | Use V.110 at 14.4Kbps.                      |
          |--------------+---------------------------------------------|
          |     B17      | Use V.110 at 19.2Kbps.                      |
          |--------------+---------------------------------------------|
          |     B18      | Use V.110 at 38.4Kbps in asynchronous mode, |
          |              | 48Kbps in synchronous mode.                 |
          |--------------+---------------------------------------------|
          |     B19      | Use V.110 at 57.6Kbps in asynchronous mode, |
          |              | 56Kbps in synchronous mode.                 |
          |--------------+---------------------------------------------|
          |     B20      | Use V.120.                                  |
          |--------------+---------------------------------------------|
          |     B40      | Use PPP asynchronous to HDLC conversion.    |
          |--------------+---------------------------------------------|
          |     B41      | Use SLIP asynchronous to HDLC conversion.   |
          |--------------+---------------------------------------------|
          |     B50      | Use smart PPP.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              PROTOCOL/SPEED - ISDN B-CHANNEL               |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S82=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects the protocol and speed that will be |
          |              | used for ISDN B-channel communications.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S82=60    | Use V.120 at 64Kbps.                        |
          |--------------+---------------------------------------------|
          |    S82=61    | Use V.120 at 56Kbps.                        |
          |--------------+---------------------------------------------|
          |    S82=62    | Use X.75 transparent at 64Kbps.             |
          |--------------+---------------------------------------------|
          |    S82=63    | Use X.75 transparent at 56Kbps.             |
          |--------------+---------------------------------------------|
          |    S82=64    | Use X.75 with T.70 at 64Kbps.               |
          |--------------+---------------------------------------------|
          |    S82=65    | Use X.75 with T.70 at 56Kbps.               |
          |--------------+---------------------------------------------|
          |    S82=66    | Use X.75 with ISO8208 at 64Kbps.            |
          |--------------+---------------------------------------------|
          |    S82=67    | Use X.75 with ISO8208 at 56Kbps.            |
          |--------------+---------------------------------------------|
          |    S82=68    | Use X.75 with T.90 at 64Kbps.               |
          |--------------+---------------------------------------------|
          |    S82=69    | Use X.75 with T.90 at 56Kbps.               |
          |--------------+---------------------------------------------|
          |    S82=70    | Use X.75 with BTX at 64Kbps.                |
          |--------------+---------------------------------------------|
          |    S82=71    | Use X.75 with BTX at 56Kbps.                |
          |--------------+---------------------------------------------|
          |    S82=72    | Use V.110 at 64Kbps.                        |
          |--------------+---------------------------------------------|
          |    S82=73    | Use V.110 at 56Kbps.                        |
          |--------------+---------------------------------------------|
          |    S82=74    | Use PPP asynchronous to HDLC conversion at  |
          |              | 64Kbps.                                     |
          |--------------+---------------------------------------------|
          |    S82=75    | Use PPP asynchronous to HDLC conversion at  |
          |              | 56Kbps.                                     |
          |--------------+---------------------------------------------|
          |    S82=76    | Use SLIP asynchronous to HDLC conversion at |
          |              | 64Kbps.                                     |
          |--------------+---------------------------------------------|
          |    S82=77    | Use SLIP asynchronous to HDLC conversion at |
          |              | 56Kbps.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          PROTOCOL/SPEED - ISDN B-CHANNEL BUNDLING          |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S100=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Selects the protocol that will be used for  |
          |              | ISDN B-channel bundling.                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S100=0   | Use Multiple Link Protocol.                 |
          |--------------+---------------------------------------------|
          |    S100=1    | Use cFossil Channel Bundling.               |
          |--------------+---------------------------------------------|
          |    S100=2    | Use PPP Multiple Link Protocol.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              PROTOCOL/SPEED - ISDN D-CHANNEL               |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Pn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Selects the protocol and speed that will be |
          |              | used for ISDN D-channel communications.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     í P0     | Use Northern Telecom.                       |
          |--------------+---------------------------------------------|
          |      P1      | Use National ISDN for 1 SPID.               |
          |--------------+---------------------------------------------|
          |      P2      | Use National ISDN for 2 SPIDs.              |
          |--------------+---------------------------------------------|
          |      P3      | Use National ISDN.                          |
          |--------------+---------------------------------------------|
          |      P4      | Use AT&T point-to-point.                    |
          |--------------+---------------------------------------------|
          |      P5      | Use AT&T multipoint for 1 SPID.             |
          |--------------+---------------------------------------------|
          |      P6      | Use AT&T multipoint for 2 SPIDs.            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              PROTOCOL/SPEED - ISDN D-CHANNEL               |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S86=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects the protocol and speed that will be |
          |              | used for ISDN D-channel communications.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S86=0    | Use Northern Telecom.                       |
          |--------------+---------------------------------------------|
          |    S86=1     | Use National ISDN for 1 SPID.               |
          |--------------+---------------------------------------------|
          |    S86=2     | Use National ISDN for 2 SPIDs.              |
          |--------------+---------------------------------------------|
          |    S86=3     | Use National ISDN.                          |
          |--------------+---------------------------------------------|
          |    S86=4     | Use AT&T point-to-point.                    |
          |--------------+---------------------------------------------|
          |    S86=5     | Use AT&T multipoint for 1 SPID.             |
          |--------------+---------------------------------------------|
          |    S86=6     | Use AT&T multipoint for 2 SPIDs.            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               PROTOCOL/SPEED - OUTGOING ISDN               |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S102=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Selects the protocol and speed that will be |
          |              | used for outgoing ISDN communications.      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   S102=60    | Use V.120 at 64Kbps.                        |
          |--------------+---------------------------------------------|
          |   S102=61    | Use V.120 at 56Kbps.                        |
          |--------------+---------------------------------------------|
          |   S102=62    | Use X.75 transparent at 64Kbps.             |
          |--------------+---------------------------------------------|
          |   S102=63    | Use X.75 transparent at 56Kbps.             |
          |--------------+---------------------------------------------|
          |   S102=64    | Use X.75 with T.70 at 64Kbps.               |
          |--------------+---------------------------------------------|
          |   S102=65    | Use X.75 with T.70 at 56Kbps.               |
          |--------------+---------------------------------------------|
          |   S102=66    | Use X.75 with ISO8208 at 64Kbps.            |
          |--------------+---------------------------------------------|
          |   S102=67    | Use X.75 with ISO8208 at 56Kbps.            |
          |--------------+---------------------------------------------|
          |   S102=68    | Use X.75 with T.90 at 64Kbps.               |
          |--------------+---------------------------------------------|
          |   S102=69    | Use X.75 with T.90 at 56Kbps.               |
          |--------------+---------------------------------------------|
          |   S102=70    | Use X.75 with BTX at 64Kbps.                |
          |--------------+---------------------------------------------|
          |   S102=71    | Use X.75 with BTX at 56Kbps.                |
          |--------------+---------------------------------------------|
          |   S102=72    | Use V.110 at 64Kbps.                        |
          |--------------+---------------------------------------------|
          |   S102=73    | Use V.110 at 56Kbps.                        |
          |--------------+---------------------------------------------|
          |   S102=74    | Use PPP asynchronous to HDLC conversion at  |
          |              | 64Kbps.                                     |
          |--------------+---------------------------------------------|
          |   S102=75    | Use PPP asynchronous to HDLC conversion at  |
          |              | 56Kbps.                                     |
          |--------------+---------------------------------------------|
          |   S102=76    | Use SLIP asynchronous to HDLC conversion at |
          |              | 64Kbps.                                     |
          |--------------+---------------------------------------------|
          |   S102=77    | Use SLIP asynchronous to HDLC conversion at |
          |              | 56Kbps.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           PROTOCOL/SPEED - SWITCHED/LEASED LINE            |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the current protocol and speed for  |
          |              | switched and leased-line calls.             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &N0     | Auto-select fastest common protocol.        |
          |--------------+---------------------------------------------|
          |     &N1      | Use V.33 14.4Kbps.                          |
          |--------------+---------------------------------------------|
          |     &N2      | Use V.33 12Kbps.                            |
          |--------------+---------------------------------------------|
          |     &N3      | Use V.32 9600bps trellis coded.             |
          |--------------+---------------------------------------------|
          |     &N4      | Use V.32 9600bps.                           |
          |--------------+---------------------------------------------|
          |     &N5      | Use V.32 4800bps.                           |
          |--------------+---------------------------------------------|
          |     &N6      | Use V.29 9600bps.                           |
          |--------------+---------------------------------------------|
          |     &N7      | Use V.29 7200bps.                           |
          |--------------+---------------------------------------------|
          |     &N8      | Use V.29 4800bps.                           |
          |--------------+---------------------------------------------|
          |     &N9      | Use V.27bis 4800bps.                        |
          |--------------+---------------------------------------------|
          |     &N10     | Use V.27bis 2400bps                         |
          |--------------+---------------------------------------------|
          |     &N11     | Use V.26bis 2400bps.                        |
          |--------------+---------------------------------------------|
          |     &N12     | Use V.23 1200/75bps.                        |
          |--------------+---------------------------------------------|
          |     &N13     | Use V.23 600/75bps.                         |
          |--------------+---------------------------------------------|
          |     &N14     | Use V.22bis 2400/1200bps.                   |
          |--------------+---------------------------------------------|
          |     &N15     | Use V.22 1200bps.                           |
          |--------------+---------------------------------------------|
          |     &N16     | Use V.21 300bps.                            |
          |--------------+---------------------------------------------|
          |     &N17     | Use V.32bis 14.4Kbps.                       |
          |--------------+---------------------------------------------|
          |     &N18     | Use V.32bis 12Kbps.                         |
          |--------------+---------------------------------------------|
          |     &N19     | Use V.32bis 7200bps.                        |
          |--------------+---------------------------------------------|
          |     &N24     | Use Bell 212A 1200bps.                      |
          |--------------+---------------------------------------------|
          |     &N25     | Use Bell 103A 300bps.                       |
          |--------------+---------------------------------------------|
          |     &N32     | Use FAX mode.                               |
          |--------------+---------------------------------------------|
          |     &N34     | Use ZyXEL 19.2Kbps.                         |
          |--------------+---------------------------------------------|
          |     &N35     | Use ZyXEL 16.8Kbps.                         |
          |--------------+---------------------------------------------|
          |     &N36     | Use ZyXEL 14.4Kbps.                         |
          |--------------+---------------------------------------------|
          |     &N37     | Use ZyXEL 12Kbps.                           |
          |--------------+---------------------------------------------|
          |     &N38     | Use ZyXEL 9600bps.                          |
          |--------------+---------------------------------------------|
          |     &N39     | Use ZyXEL 7200bps.                          |
          |--------------+---------------------------------------------|
          |     &N42     | Use ZyCELL 14.4Kbps.                        |
          |--------------+---------------------------------------------|
          |     &N43     | Use ZyCELL 12Kbps.                          |
          |--------------+---------------------------------------------|
          |     &N44     | Use ZyCELL 9600bps.                         |
          |--------------+---------------------------------------------|
          |     &N45     | Use ZyCELL 7200bps.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |       PROTOCOL/SPEED - SWITCHED/LEASED LINE (CON’T)        |
          |------------------------------------------------------------|
          |     Command     |                 Function                 |
          |-----------------+------------------------------------------|
          |      &N46       | Use ZyCELL 4800bps.                      |
          |-----------------+------------------------------------------|
          |      &N62       | Use V.34 28.8Kbps.                       |
          |-----------------+------------------------------------------|
          |      &N63       | Use V.34 26.4Kbps.                       |
          |-----------------+------------------------------------------|
          |      &N64       | Use V.34 24Kbps.                         |
          |-----------------+------------------------------------------|
          |      &N65       | Use V.34 21.6Kbps.                       |
          |-----------------+------------------------------------------|
          |      &N66       | Use V.34 19.2Kbps.                       |
          |-----------------+------------------------------------------|
          |      &N67       | Use V.34 16.8Kbps.                       |
          |-----------------+------------------------------------------|
          |      &N68       | Use V.34 14.4Kbps.                       |
          |-----------------+------------------------------------------|
          |      &N69       | Use V.34 12Kbps.                         |
          |-----------------+------------------------------------------|
          |      &N70       | Use V.34 9600bps.                        |
          |-----------------+------------------------------------------|
          |      &N71       | Use V.34 7200bps.                        |
          |-----------------+------------------------------------------|
          |      &N72       | Use V.34 4800bps.                        |
          |-----------------+------------------------------------------|
          |      &N73       | Use V.34 2400bps.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           PROTOCOL/SPEED - SWITCHED/LEASED LINE            |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S19=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects the current protocol and speed for  |
          |              | switched and leased-line calls.             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S19=0    | Auto-select fastest common protocol.        |
          |--------------+---------------------------------------------|
          |    S19=1     | Use V.33 14.4Kbps.                          |
          |--------------+---------------------------------------------|
          |    S19=2     | Use V.33 12Kbps.                            |
          |--------------+---------------------------------------------|
          |    S19=3     | Use V.32 9600bps trellis coded.             |
          |--------------+---------------------------------------------|
          |    S19=4     | Use V.32 9600bps.                           |
          |--------------+---------------------------------------------|
          |    S19=5     | Use V.32 4800bps.                           |
          |--------------+---------------------------------------------|
          |    S19=6     | Use V.29 9600bps.                           |
          |--------------+---------------------------------------------|
          |    S19=7     | Use V.29 7200bps.                           |
          |--------------+---------------------------------------------|
          |    S19=8     | Use V.29 4800bps.                           |
          |--------------+---------------------------------------------|
          |    S19=9     | Use V.27bis 4800bps.                        |
          |--------------+---------------------------------------------|
          |    S19=10    | Use V.27bis 2400bps                         |
          |--------------+---------------------------------------------|
          |    S19=11    | Use V.26bis 2400bps.                        |
          |--------------+---------------------------------------------|
          |    S19=12    | Use V.23 1200/75bps.                        |
          |--------------+---------------------------------------------|
          |    S19=13    | Use V.23 600/75bps.                         |
          |--------------+---------------------------------------------|
          |    S19=14    | Use V.22bis 2400/1200bps.                   |
          |--------------+---------------------------------------------|
          |    S19=15    | Use V.22 1200bps.                           |
          |--------------+---------------------------------------------|
          |    S19=16    | Use V.21 300bps.                            |
          |--------------+---------------------------------------------|
          |    S19=17    | Use V.32bis 14.4Kbps.                       |
          |--------------+---------------------------------------------|
          |    S19=18    | Use V.32bis 12Kbps.                         |
          |--------------+---------------------------------------------|
          |    S19=19    | Use V.32bis 7200bps.                        |
          |--------------+---------------------------------------------|
          |    S19=24    | Use Bell 212A 1200bps.                      |
          |--------------+---------------------------------------------|
          |    S19=25    | Use Bell 103A 300bps.                       |
          |--------------+---------------------------------------------|
          |    S19=32    | Use FAX mode.                               |
          |--------------+---------------------------------------------|
          |    S19=34    | Use ZyXEL 19.2Kbps.                         |
          |--------------+---------------------------------------------|
          |    S19=35    | Use ZyXEL 16.8Kbps.                         |
          |--------------+---------------------------------------------|
          |    S19=36    | Use ZyXEL 14.4Kbps.                         |
          |--------------+---------------------------------------------|
          |    S19=37    | Use ZyXEL 12Kbps.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |       PROTOCOL/SPEED - SWITCHED/LEASED LINE (CON’T)        |
          |------------------------------------------------------------|
          |     Command     |                 Function                 |
          |-----------------+------------------------------------------|
          |     S19=38      | Use ZyXEL 9600bps.                       |
          |-----------------+------------------------------------------|
          |     S19=39      | Use ZyXEL 7200bps.                       |
          |-----------------+------------------------------------------|
          |     S19=42      | Use ZyCELL 14.4Kbps.                     |
          |-----------------+------------------------------------------|
          |     S19=43      | Use ZyCELL 12Kbps.                       |
          |-----------------+------------------------------------------|
          |     S19=44      | Use ZyCELL 9600bps.                      |
          |-----------------+------------------------------------------|
          |     S19=45      | Use ZyCELL 7200bps.                      |
          |-----------------+------------------------------------------|
          |     S19=46      | Use ZyCELL 4800bps.                      |
          |-----------------+------------------------------------------|
          |     S19=62      | Use V.34 28.8Kbps.                       |
          |-----------------+------------------------------------------|
          |     S19=63      | Use V.34 26.4Kbps.                       |
          |-----------------+------------------------------------------|
          |     S19=64      | Use V.34 24Kbps.                         |
          |-----------------+------------------------------------------|
          |     S19=65      | Use V.34 21.6Kbps.                       |
          |-----------------+------------------------------------------|
          |     S19=66      | Use V.34 19.2Kbps.                       |
          |-----------------+------------------------------------------|
          |     S19=67      | Use V.34 16.8Kbps.                       |
          |-----------------+------------------------------------------|
          |     S19=68      | Use V.34 14.4Kbps.                       |
          |-----------------+------------------------------------------|
          |     S19=69      | Use V.34 12Kbps.                         |
          |-----------------+------------------------------------------|
          |     S19=70      | Use V.34 9600bps.                        |
          |-----------------+------------------------------------------|
          |     S19=71      | Use V.34 7200bps.                        |
          |-----------------+------------------------------------------|
          |     S19=72      | Use V.34 4800bps.                        |
          |-----------------+------------------------------------------|
          |     S19=73      | Use V.34 2400bps.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  READ PROFILE FROM REMOTE                  |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Rmn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Reads configuration n from the remote modem |
          |              | and stores it in local profile m.           |
          |--------------+---------------------------------------------|
          |   Profile    |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      0       | Stored profile 0.                           |
          |--------------+---------------------------------------------|
          |      1       | Stored profile 1.                           |
          |--------------+---------------------------------------------|
          |      2       | Stored profile 2.                           |
          |--------------+---------------------------------------------|
          |      3       | Stored profile 3.                           |
          |--------------+---------------------------------------------|
          |      4       | Active configuration; may be applied only   |
          |              | to remote.                                  |
          |--------------+---------------------------------------------|
          |      5       | Factory defaults; may be applied only to    |
          |              | remote.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                           REDIAL                           |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] DL                                |
          |--------------+---------------------------------------------|
          | Description: | Redials the last number dialed.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    REDIAL CONTINUOUSLY                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | A>                                          |
          |--------------+---------------------------------------------|
          | Description: | Redials the last number dialed up to 9      |
          |              | times.                                      |
          |--------------+---------------------------------------------|
          | Note:        | Do not precede this command with AT or      |
          |              | follow it with <CR>.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                REMOTE CONFIGURATION REQUEST                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Fn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the modem to accept or deny requests   |
          |              | for remote configuration.                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *F0     | Deny remote configuration request.          |
          |--------------+---------------------------------------------|
          |     *F1      | Grant remote configuration request. &T4     |
          |              | must also be set.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RESULT CODES                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Xn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Selects which result codes will be          |
          |              | displayed.                                  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      X0      | Basic result codes only enabled.            |
          |--------------+---------------------------------------------|
          |      X1      | Basic and connection speed result codes     |
          |              | enabled.                                    |
          |--------------+---------------------------------------------|
          |      X2      | Basic and connection speed result codes and |
          |              | dialtone detection enabled.                 |
          |--------------+---------------------------------------------|
          |      X3      | All result codes except dialtone detection  |
          |              | enabled.                                    |
          |--------------+---------------------------------------------|
          |      X4      | All result codes enabled.                   |
          |--------------+---------------------------------------------|
          |     í X5     | All result codes plus DTE speed and error   |
          |              | control level enabled.                      |
          |--------------+---------------------------------------------|
          |      X6      | All result codes plus ARQ enabled.          |
          |--------------+---------------------------------------------|
          |      X7      | All result codes plus ARQ and error control |
          |              | level enabled.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RING VOLUME                         |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] Nn [cmds]                         |
          |--------------+---------------------------------------------|
          | Default:     | 5                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 7                                       |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the volume of the ring sound. N0       |
          |              | disables the ring sound.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       RTS/CTS DELAY                        |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S26=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 10 ms                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the time in synchronous mode between   |
          |              | the RTS signal going high and the CTS       |
          |              | signal being set high.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     SECONDARY CHANNEL                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Sn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the secondary channel.              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *S0     | Secondary channel disabled.                 |
          |--------------+---------------------------------------------|
          |     *S1      | Secondary channel enabled.                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   SECURITY CONFIGURATION                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Gn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets security mode and options.             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í *G0     | Security disabled.                          |
          |--------------+---------------------------------------------|
          |     *G1      | Security type I and password check enabled. |
          |--------------+---------------------------------------------|
          |     *G2      | Security type I, callback, and password     |
          |              | check enabled.                              |
          |--------------+---------------------------------------------|
          |     *G3      | Security type II and password check         |
          |              | enabled.                                    |
          |--------------+---------------------------------------------|
          |     *G4      | Security type II, callback, and password    |
          |              | check enabled.                              |
          |--------------+---------------------------------------------|
          |     *G5      | Security type II, callback, and password    |
          |              | check enabled. Callback number sent by      |
          |              | remote.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      SERIAL PORT MODE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CMn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the operating mode of the serial       |
          |              | interface.                                  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í CM0     | Single-stream mode.                         |
          |--------------+---------------------------------------------|
          |     CM1      | Multistream mode.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SERVICE INDICATOR - A/B ADAPTER               |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S107=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the 1TR6 Service Indicator for A/B     |
          |              | adapter calls.                              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S107=1   | Service Indicator set for voice call.       |
          |--------------+---------------------------------------------|
          |    S107=2    | Service Indicator set for data/fax call.    |
          |--------------+---------------------------------------------|
          |    S107=7    | Service Indicator set for ISDN call.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               SERVICE INDICATOR - FAX/MODEM                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S104=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the 1TR6 Service Indicator for         |
          |              | fax/modem calls.                            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S104=1   | Service Indicator set for voice call.       |
          |--------------+---------------------------------------------|
          |    S104=2    | Service Indicator set for data/fax call.    |
          |--------------+---------------------------------------------|
          |    S104=7    | Service Indicator set for ISDN call.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  SERVICE INDICATOR - ISDN                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S106=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the 1TR6 Service Indicator for ISDN    |
          |              | calls.                                      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S106=1   | Service Indicator set for voice call.       |
          |--------------+---------------------------------------------|
          |    S106=2    | Service Indicator set for data/fax call.    |
          |--------------+---------------------------------------------|
          |    S106=7    | Service Indicator set for ISDN call.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          SERVICE INDICATOR DETAILS - A/B ADAPTER           |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S111=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets additional details for the 1TR6        |
          |              | Service Indicator for A/B adapter calls.    |
          |--------------+---------------------------------------------|
          |   Service    |   Command    |           Function           |
          |  Indicator   |              |                              |
          |--------------+--------------+------------------------------|
          |    S107=1    |    S111=1    | 3.1KHz digital voice         |
          |--------------+--------------+------------------------------|
          |              |    S111=2    | Analog voice                 |
          |--------------+--------------+------------------------------|
          |    S107=2    |    S111=2    | Fax call                     |
          |--------------+--------------+------------------------------|
          |              |    S111=3    | Data call                    |
          |--------------+--------------+------------------------------|
          |              |    S111=4    | BTX call                     |
          |--------------+--------------+------------------------------|
          |    S107=7    | Bit  | Value |           Function           |
          |--------------+------+-------+------------------------------|
          |              | 1-0  |    00 | X.75 protocol                |
          |              |      |       |                              |
          |              |      |    01 | Asynchronous V.110 protocol  |
          |              |      |       |                              |
          |              |      |    10 | Asynchronous V.110 protocol  |
          |              |      |       |                              |
          |              |      |    11 | Synchronous V.110 protocol   |
          |--------------+---------------------------------------------|
          |              |        For V.110 asynchronous mode:         |
          |--------------+---------------------------------------------|
          |              |  2   |     0 | 8 data bits                  |
          |              |      |       |                              |
          |              |      |     1 | 7 data bits                  |
          |--------------+------+-------+------------------------------|
          |              |  3   |     0 | 1 stop bit                   |
          |              |      |       |                              |
          |              |      |     1 | 2 stop bits                  |
          |--------------+------+-------+------------------------------|
          |              |  4   |     0 | No parity                    |
          |              |      |       |                              |
          |              |      |     1 | Even parity                  |
          |--------------+------+-------+------------------------------|
          |              | 7-5  |       | Bits 1-0: 01 | Bits 1-0: 10  |
          |--------------+------+-------+--------------+---------------|
          |              |      |   000 | 1200bps      | 38.4Kbps      |
          |--------------+------+-------+------------------------------|
          |              |      |   011 | 2400bps                      |
          |              |      |       |                              |
          |              |      |   100 | 4800bps                      |
          |              |      |       |                              |
          |              |      |   101 | 9600bps                      |
          |              |      |       |                              |
          |              |      |   110 | 14.4Kbps                     |
          |              |      |       |                              |
          |              |      |   111 | 19.2Kbps                     |
          |--------------+---------------------------------------------|
          |              |         For V.110 synchronous mode:         |
          |--------------+---------------------------------------------|
          |              | 3-2  |    01 | Not used                     |
          |--------------+------+-------+------------------------------|
          |              | 7-4  |  0000 | 1200bps                      |
          |              |      |       |                              |
          |              |      |  0011 | 2400bps                      |
          |              |      |       |                              |
          |              |      |  0100 | 4800bps                      |
          |              |      |       |                              |
          |              |      |  1010 | 9600bps                      |
          |              |      |       |                              |
          |              |      |  0110 | 14.4Kbps                     |
          |              |      |       |                              |
          |              |      |  0111 | 19.2Kbps                     |
          |              |      |       |                              |
          |              |      |  1000 | 48Kbps                       |
          |              |      |       |                              |
          |              |      |  1001 | 56Kbps                       |
          |              |      |       |                              |
          |              |      |  1010 | 56Kbps on 56Kbps line only   |
          |              |      |       |                              |
          |              |      |  1111 | Negotiate highest common     |
          |              |      |       | speed                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           SERVICE INDICATOR DETAILS - FAX/MODEM            |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S108=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets additional details for the 1TR6        |
          |              | Service Indicator for fax/modem calls.      |
          |--------------+---------------------------------------------|
          |   Service    |   Command    |           Function           |
          |  Indicator   |              |                              |
          |--------------+--------------+------------------------------|
          |    S107=1    |    S108=1    | 3.1KHz digital voice         |
          |--------------+--------------+------------------------------|
          |              |    S108=2    | Analog voice                 |
          |--------------+--------------+------------------------------|
          |    S107=2    |    S108=2    | Fax call                     |
          |--------------+--------------+------------------------------|
          |              |    S108=3    | Data call                    |
          |--------------+--------------+------------------------------|
          |              |    S108=4    | BTX call                     |
          |--------------+--------------+------------------------------|
          |    S107=7    | Bit  | Value |           Function           |
          |--------------+------+-------+------------------------------|
          |              | 1-0  |    00 | X.75 protocol                |
          |              |      |       |                              |
          |              |      |    01 | Asynchronous V.110 protocol  |
          |              |      |       |                              |
          |              |      |    10 | Asynchronous V.110 protocol  |
          |              |      |       |                              |
          |              |      |    11 | Synchronous V.110 protocol   |
          |--------------+---------------------------------------------|
          |              |        For V.110 asynchronous mode:         |
          |--------------+---------------------------------------------|
          |              |  2   |     0 | 8 data bits                  |
          |              |      |       |                              |
          |              |      |     1 | 7 data bits                  |
          |--------------+------+-------+------------------------------|
          |              |  3   |     0 | 1 stop bit                   |
          |              |      |       |                              |
          |              |      |     1 | 2 stop bits                  |
          |--------------+------+-------+------------------------------|
          |              |  4   |     0 | No parity                    |
          |              |      |       |                              |
          |              |      |     1 | Even parity                  |
          |--------------+------+-------+------------------------------|
          |              | 7-5  |       | Bits 1-0: 01 | Bits 1-0: 10  |
          |--------------+------+-------+--------------+---------------|
          |              |      |   000 | 1200bps      | 38.4Kbps      |
          |--------------+------+-------+------------------------------|
          |              |      |   011 | 2400bps                      |
          |              |      |       |                              |
          |              |      |   100 | 4800bps                      |
          |              |      |       |                              |
          |              |      |   101 | 9600bps                      |
          |              |      |       |                              |
          |              |      |   110 | 14.4Kbps                     |
          |              |      |       |                              |
          |              |      |   111 | 19.2Kbps                     |
          |--------------+---------------------------------------------|
          |              |         For V.110 synchronous mode:         |
          |--------------+---------------------------------------------|
          |              | 3-2  |    01 | Not used                     |
          |--------------+------+-------+------------------------------|
          |              | 7-4  |  0000 | 1200bps                      |
          |              |      |       |                              |
          |              |      |  0011 | 2400bps                      |
          |              |      |       |                              |
          |              |      |  0100 | 4800bps                      |
          |              |      |       |                              |
          |              |      |  1010 | 9600bps                      |
          |              |      |       |                              |
          |              |      |  0110 | 14.4Kbps                     |
          |              |      |       |                              |
          |              |      |  0111 | 19.2Kbps                     |
          |              |      |       |                              |
          |              |      |  1000 | 48Kbps                       |
          |              |      |       |                              |
          |              |      |  1001 | 56Kbps                       |
          |              |      |       |                              |
          |              |      |  1010 | 56Kbps on 56Kbps line only   |
          |              |      |       |                              |
          |              |      |  1111 | Negotiate highest common     |
          |              |      |       | speed                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SERVICE INDICATOR DETAILS - ISDN              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S110=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets additional details for the 1TR6        |
          |              | Service Indicator for ISDN calls.           |
          |--------------+---------------------------------------------|
          |   Service    |   Command    |           Function           |
          |  Indicator   |              |                              |
          |--------------+--------------+------------------------------|
          |    S107=1    |    S110=1    | 3.1KHz digital voice         |
          |--------------+--------------+------------------------------|
          |              |    S110=2    | Analog voice                 |
          |--------------+--------------+------------------------------|
          |    S107=2    |    S110=2    | Fax call                     |
          |--------------+--------------+------------------------------|
          |              |    S110=3    | Data call                    |
          |--------------+--------------+------------------------------|
          |              |    S110=4    | BTX call                     |
          |--------------+--------------+------------------------------|
          |    S107=7    | Bit  | Value |           Function           |
          |--------------+------+-------+------------------------------|
          |              | 1-0  |    00 | X.75 protocol                |
          |              |      |       |                              |
          |              |      |    01 | Asynchronous V.110 protocol  |
          |              |      |       |                              |
          |              |      |    10 | Asynchronous V.110 protocol  |
          |              |      |       |                              |
          |              |      |    11 | Synchronous V.110 protocol   |
          |--------------+---------------------------------------------|
          |              |        For V.110 asynchronous mode:         |
          |--------------+---------------------------------------------|
          |              |  2   |     0 | 8 data bits                  |
          |              |      |       |                              |
          |              |      |     1 | 7 data bits                  |
          |--------------+------+-------+------------------------------|
          |              |  3   |     0 | 1 stop bit                   |
          |              |      |       |                              |
          |              |      |     1 | 2 stop bits                  |
          |--------------+------+-------+------------------------------|
          |              |  4   |     0 | No parity                    |
          |              |      |       |                              |
          |              |      |     1 | Even parity                  |
          |--------------+------+-------+------------------------------|
          |              | 7-5  |       | Bits 1-0: 01 | Bits 1-0: 10  |
          |--------------+------+-------+--------------+---------------|
          |              |      |   000 | 1200bps      | 38.4Kbps      |
          |--------------+------+-------+------------------------------|
          |              |      |   011 | 2400bps                      |
          |              |      |       |                              |
          |              |      |   100 | 4800bps                      |
          |              |      |       |                              |
          |              |      |   101 | 9600bps                      |
          |              |      |       |                              |
          |              |      |   110 | 14.4Kbps                     |
          |              |      |       |                              |
          |              |      |   111 | 19.2Kbps                     |
          |--------------+---------------------------------------------|
          |              |         For V.110 synchronous mode:         |
          |--------------+---------------------------------------------|
          |              | 3-2  |    01 | Not used                     |
          |--------------+------+-------+------------------------------|
          |              | 7-4  |  0000 | 1200bps                      |
          |              |      |       |                              |
          |              |      |  0011 | 2400bps                      |
          |              |      |       |                              |
          |              |      |  0100 | 4800bps                      |
          |              |      |       |                              |
          |              |      |  1010 | 9600bps                      |
          |              |      |       |                              |
          |              |      |  0110 | 14.4Kbps                     |
          |              |      |       |                              |
          |              |      |  0111 | 19.2Kbps                     |
          |              |      |       |                              |
          |              |      |  1000 | 48Kbps                       |
          |              |      |       |                              |
          |              |      |  1001 | 56Kbps                       |
          |              |      |       |                              |
          |              |      |  1010 | 56Kbps on 56Kbps line only   |
          |              |      |       |                              |
          |              |      |  1111 | Negotiate highest common     |
          |              |      |       | speed                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SERVICE PROFILE ID NUMBER                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] SPIDn=aaaa [cmds]                 |
          |--------------+---------------------------------------------|
          | Description: | Sets service profile ID number n to aaaa.   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         SOFT RESET                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Zn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Restores modem profiles previously saved in |
          |              | non-volatile RAM using the &W command.      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      Z0      | Restore profile 0.                          |
          |--------------+---------------------------------------------|
          |      Z1      | Restore profile 1.                          |
          |--------------+---------------------------------------------|
          |      Z2      | Restore profile 2.                          |
          |--------------+---------------------------------------------|
          |      Z3      | Restore profile 3.                          |
          |--------------+---------------------------------------------|
          |      Z4      | Restore factory defaults and use them as    |
          |              | power-on defaults.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    STATUS REGISTER BIT                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | Read: AT [cmds] Sn.m=0 or 1 [cmds]          |
          |              |                                             |
          |              | Write: AT [cmds] Sn.m=? [cmds]              |
          |--------------+---------------------------------------------|
          | Example:     | AT S40.4=1 S51.3?<CR>                       |
          |--------------+---------------------------------------------|
          | Description: | Sets/clears or reads bit m of register n.   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    STORE ACTIVE PROFILE                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Wn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Writes the values for the active profile    |
          |              | into the non-volatile RAM.                  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &W0      | Write the active profile to stored profile  |
          |              | 0.                                          |
          |--------------+---------------------------------------------|
          |     &W1      | Write the active profile to stored profile  |
          |              | 1.                                          |
          |--------------+---------------------------------------------|
          |     &W2      | Write the active profile to stored profile  |
          |              | 2.                                          |
          |--------------+---------------------------------------------|
          |     &W3      | Write the active profile to stored profile  |
          |              | 3.                                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      TELEPHONE STATUS                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VLH? [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Reports whether the telephone connected to  |
          |              | the Line In jack is on-hook.                |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |    +VLH=0    | Telephone is on-hook.                       |
          |--------------+---------------------------------------------|
          |    +VLH=1    | Telephone is off-hook.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST MODES                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Tn                               |
          |--------------+---------------------------------------------|
          | Description: | Performs and configures test modes.         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &T0      | End current test.                           |
          |--------------+---------------------------------------------|
          |     &T1      | Begin local analog loopback test.           |
          |--------------+---------------------------------------------|
          |     &T3      | Begin local digital loopback.               |
          |--------------+---------------------------------------------|
          |     &T4      | Grant remote digital loopback request.      |
          |--------------+---------------------------------------------|
          |     &T5      | Deny remote digital loopback request.       |
          |--------------+---------------------------------------------|
          |     &T6      | Request remote digital loopback             |
          |--------------+---------------------------------------------|
          |     &T7      | Request remote digital loopback and         |
          |              | self-test.                                  |
          |--------------+---------------------------------------------|
          |     &T8      | Begin local analog loopback and self-test.  |
          |--------------+---------------------------------------------|
          |     &T9      | Begin ISDN loopback.                        |
          |--------------+---------------------------------------------|
          |     &T10     | Begin ISDN loopback and self-test.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                TONE GENERATOR (PHONE KEYS)                 |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VTS=a                            |
          |--------------+---------------------------------------------|
          | Example:     | AT +VTS=* +VTS=A<CR>                        |
          |--------------+---------------------------------------------|
          | Range:       | 0-9, A-D, #, *                              |
          |--------------+---------------------------------------------|
          | Description: | Generates the DTMF tone for the characters  |
          |              | in the string for the duration set with     |
          |              | +VBT.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             TONE GENERATOR (TIMED PHONE KEYS)              |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VTS={a, n}                       |
          |--------------+---------------------------------------------|
          | Example:     | AT +VTS={*, 10}<CR>                         |
          |--------------+---------------------------------------------|
          | Range:       | a 0-9, A-D, #, *; x 0-255                   |
          |--------------+---------------------------------------------|
          | Unit:        | x .1 second                                 |
          |--------------+---------------------------------------------|
          | Description: | Generates the DTMF tone for duration x for  |
          |              | the character a.                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               TONE GENERATOR (DIRECT ENTRY)                |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VTS=[m, n, x]                    |
          |--------------+---------------------------------------------|
          | Example:     | AT +VTS=[2000, 3000, 12]<CR>                |
          |--------------+---------------------------------------------|
          | Range:       | m 200-3300, n 200-3300, x 0-255             |
          |--------------+---------------------------------------------|
          | Unit:        | m 1 Hz, n 1 Hz, x .1 second                 |
          |--------------+---------------------------------------------|
          | Description: | Generates a dual-frequency tone for         |
          |              | duration x at frequencies m and n.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   TONE GENERATOR LENGTH                    |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] +VTD=n,m [cmds]                   |
          |--------------+---------------------------------------------|
          | Default:     | n 50, m 70                                  |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | 10ms                                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of DTMF tones that are      |
          |              | generated to n and the delay between tones  |
          |              | to m.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      TRANSMIT MESSAGE                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Tnxxxx [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sends a text message xxxx to the remote     |
          |              | modem with the specified protocol.          |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      T0      | Send in user-defined protocol.              |
          |--------------+---------------------------------------------|
          |      T1      | Send in OSI high-layer protocol.            |
          |--------------+---------------------------------------------|
          |      T2      | Send in X.244.                              |
          |--------------+---------------------------------------------|
          |      T3      | Used for system management.                 |
          |--------------+---------------------------------------------|
          |     í T4     | Send in IA5 format.                         |
          |--------------+---------------------------------------------|
          |      T7      | Send in ITU-T V.120 protocol.               |
          |--------------+---------------------------------------------|
          |      T8      | Send in Q.931 call control protocol.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   U-1496 COMPATIBLE MODE                   |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S62=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects whether the modem will use the      |
          |              | settings from the U-1496 model or the       |
          |              | normal settings. This affects register S18. |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S62=0    | U-1496 compatible mode disabled.            |
          |--------------+---------------------------------------------|
          |    S62=1     | U-1496 compatible mode enabled.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      U-INTERFACE MODE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] CUn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the function of the U-interface.    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í CU0     | Normal TA mode.                             |
          |--------------+---------------------------------------------|
          |     CU1      | Local modem RT mode.                        |
          |--------------+---------------------------------------------|
          |     CU2      | Local modem COT mode.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        V.110 SPEED                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S117=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Selects the speed that will be used for     |
          |              | V.110 communications.                       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S117=0    | V.110 autospeed.                            |
          |--------------+---------------------------------------------|
          |    S117=1    | V.110 at 64Kbps in synchronous mode.        |
          |--------------+---------------------------------------------|
          |    S117=3    | V.110 at 2400bps.                           |
          |--------------+---------------------------------------------|
          |    S117=4    | V.110 at 4800bps.                           |
          |--------------+---------------------------------------------|
          |    S117=5    | V.110 at 9600bps.                           |
          |--------------+---------------------------------------------|
          |    S117=6    | V.110 at 14.4Kbps.                          |
          |--------------+---------------------------------------------|
          |    S117=7    | V.110 at 19.2Kbps.                          |
          |--------------+---------------------------------------------|
          |    S117=8    | V.110 at 38.4Kbps in asynchronous mode,     |
          |              | 48Kbps in synchronous mode.                 |
          |--------------+---------------------------------------------|
          |    S117=9    | V.110 at 57.6Kbps in asynchronous mode,     |
          |              | 56Kbps in synchronous mode.                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   VOICE AUTO-DISCONNECT                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VNH=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Configures the auto-disconnect mode.        |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í +VNH=0   | Auto-disconnect disabled.                   |
          |--------------+---------------------------------------------|
          |    +VNH=1    | Auto-disconnect enabled.                    |
          |--------------+---------------------------------------------|
          |    +VNH=2    | Auto-disconnect enabled, but ATH disables   |
          |              | auto-disconnect and does not hang up.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     VOICE COMPRESSION                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VSM=n,m [cmds]                   |
          |--------------+---------------------------------------------|
          | Description: | Selects the compression type and sample     |
          |              | rate to be used for voice data storage.     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    m=7200    | Select 7.2KHz sample rate.                  |
          |--------------+---------------------------------------------|
          |    m=8000    | Select 8KHz sample rate.                    |
          |--------------+---------------------------------------------|
          |    m=9600    | Select 9.6KHz sample rate.                  |
          |--------------+---------------------------------------------|
          |   m=11025    | Select 11KHz sample rate.                   |
          |--------------+---------------------------------------------|
          |     n=1      | Select Code Excited Linear Prediction       |
          |              | compression.                                |
          |--------------+---------------------------------------------|
          |     n=2      | Select 2-bit ZyXEL ADPCM compression.       |
          |--------------+---------------------------------------------|
          |     n=3      | Select 3-bit ZyXEL ADPCM compression.       |
          |--------------+---------------------------------------------|
          |     n=4      | Select 4-bit ZyXEL ADPCM compression.       |
          |--------------+---------------------------------------------|
          |     n=30     | Select 3-bit ZyXEL ADPCM compression with   |
          |              | resync.                                     |
          |--------------+---------------------------------------------|
          |     n=40     | Select 4-bit DVI ADPCM compression.         |
          |--------------+---------------------------------------------|
          |     n=80     | Select 8-bit A-law PCM compression.         |
          |--------------+---------------------------------------------|
          |     n=81     | Select 8-bit Mu-law PCM compression.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       VOICE CONNECT                        |
          |------------------------------------------------------------|
          | Type:        | Result code                                 |
          |--------------+---------------------------------------------|
          | Format:      | VCON                                        |
          |--------------+---------------------------------------------|
          | Description: | Returned by the modem when a voice          |
          |              | connection has been made.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        VOICE DEVICE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VLS=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Selects the I/O device for the DSP chip.    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    +VLS=0    | Voice I/O disabled.                         |
          |--------------+---------------------------------------------|
          |    +VLS=1    | Telephone connected to Line In jack.        |
          |--------------+---------------------------------------------|
          |    +VLS=2    | Phone line connected to switched line jack. |
          |--------------+---------------------------------------------|
          |    +VLS=8    | External microphone.                        |
          |--------------+---------------------------------------------|
          |   +VLS=16    | Internal speaker.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    VOICE DTMF DETECTION                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VDD=m,n [cmds]                   |
          |--------------+---------------------------------------------|
          | Default:     | m 15, n 8                                   |
          |--------------+---------------------------------------------|
          | Range:       | m 0-31, n 0-255                             |
          |--------------+---------------------------------------------|
          | Unit:        | m 1 dB, n .1 second                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the threshold of DTMF detection (m)    |
          |              | and the minimum period of DTMF required to  |
          |              | be detected (n).                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   VOICE GAIN - PLAYBACK                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VGT=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 128                                         |
          |--------------+---------------------------------------------|
          | Range:       | 56-200                                      |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the gain for voice playback.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    VOICE GAIN - RECORD                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VGR=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0, 56-200                                   |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the gain for received voice signals. A |
          |              | value of 0 sets automatic gain level.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   VOICE INACTIVITY TIMER                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VIT=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 70                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem does |
          |              | not receive any voice data before it        |
          |              | returns to command mode.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 VOICE INITIALIZE SETTINGS                  |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VIP [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Resets all voice mode settings to factory   |
          |              | defaults.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 VOICE OFF-HOOK SENSITIVITY                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VVT=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 16                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | N/A                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the sensitivity of detection of the    |
          |              | remote site going off-hook. Lower numbers   |
          |              | are more sensitive.                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       VOICE RECEIVE                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VRX                              |
          |--------------+---------------------------------------------|
          | Description: | Begins receiving voice data.                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 VOICE RE-RING DETECT TIME                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VRA=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 70                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum time the modem will wait   |
          |              | for the remote station to ring again before |
          |              | it assumes that it has gone off-hook.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     VOICE RESYNC CLOCK                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VSY=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 50 ms                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the time between resync signals in the |
          |              | stored voice data.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   VOICE RING DETECT TIME                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VRN=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum time the modem will wait   |
          |              | for the remote station to ring before it    |
          |              | assumes that it went off-hook before it     |
          |              | rang.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  VOICE SILENCE DETECTION                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VSD=m,n [cmds]                   |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | m 0-31, n 0-255                             |
          |--------------+---------------------------------------------|
          | Unit:        | m 1 dB, n .1 second                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the threshold of silence detection (m) |
          |              | and the minimum period of silence required  |
          |              | to be detected (n).                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       VOICE TRANSMIT                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] +VTX                              |
          |--------------+---------------------------------------------|
          | Description: | Begins transmitting voice data.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  WRITE PROFILE TO REMOTE                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Wmn [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Reads configuration n from the local modem  |
          |              | and stores it in remote profile m.          |
          |--------------+---------------------------------------------|
          |   Profile    |                  Function                   |
          |--------------+---------------------------------------------|
          |      0       | Stored profile 0.                           |
          |--------------+---------------------------------------------|
          |      1       | Stored profile 1.                           |
          |--------------+---------------------------------------------|
          |      2       | Stored profile 2.                           |
          |--------------+---------------------------------------------|
          |      3       | Stored profile 3.                           |
          |--------------+---------------------------------------------|
          |      4       | Active configuration; may be applied only   |
          |              | to local.                                   |
          |--------------+---------------------------------------------|
          |      5       | Factory defaults; may be applied only to    |
          |              | local.                                      |
          +------------------------------------------------------------+
       
                         Proprietary V.25bis Command Set
       
          +------------------------------------------------------------+
          |                      COMMAND SET - AT                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | RST                                         |
          |--------------+---------------------------------------------|
          | Description: | Returns to AT command set.                  |
          +------------------------------------------------------------+