(TXT) View Source
       
       # DATATRONICS TECHNOLOGY, INC.
       
          DISCOVERY LCD
       
          Card Type              Modem(synchronous/asynchronous)         
          Chip Set               Unidentified                            
          Maximum Data Rate      28.8Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Bus               External                                
          Fax Class              Class II                                
          Data Modulation        Bell 103A/212A                          
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.23, V.32,  
                                 V.32bis, V.34                           
                                                                         
                                 Rockwell V.FC                           
          Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29      
          Protocol               
          Error                  MNP5, V.42bis                           
          Correction/Compression 
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |   Function    |  Label   |     Function      |    Label    |
          |------------------------------------------------------------|
          | Line out             |   CN1   | Power switch        | SW1 |
          |----------------------+---------+---------------------+-----|
          | Line in/leased line  |   CN2   | LCD panel lock      | SW2 |
          |----------------------+---------+---------------------+-----|
          | RS-232/422           |   CN3   | Voice/data          | SW3 |
          |----------------------+---------+---------------------+-----|
          | DC power             |   CN4   | LCD panel           | NAV |
          |                      |         | navigation          |     |
          |----------------------+---------+---------------------+-----|
          | Volume               |   R1    |                     |     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED  | Color  |  Status  |            Condition            |
          |------+--------+----------+---------------------------------|
          |  MR  | Yellow |    On    |           Power is on           |
          |------+--------+----------+---------------------------------|
          |  MR  | Yellow |   Off    |          Power is off           |
          |------+--------+----------+---------------------------------|
          |  TR  | Yellow |    On    |       DTR signal is high        |
          |------+--------+----------+---------------------------------|
          |  TR  | Yellow |   Off    |        DTR signal is low        |
          |------+--------+----------+---------------------------------|
          | RTS  | Yellow |    On    |       RTS signal is high        |
          |------+--------+----------+---------------------------------|
          | RTS  | Yellow |   Off    |        RTS signal is low        |
          |------+--------+----------+---------------------------------|
          | CTS  | Yellow |    On    |       CTS signal is high        |
          |------+--------+----------+---------------------------------|
          | CTS  | Yellow |   Off    |        CTS signal is low        |
          |------+--------+----------+---------------------------------|
          |  AA  | Yellow |    On    |       Auto-answer enabled       |
          |------+--------+----------+---------------------------------|
          |  AA  | Yellow |   Off    |      Auto-answer disabled       |
          |------+--------+----------+---------------------------------|
          |  AA  | Yellow | Blinking |        Phone is ringing         |
          |------+--------+----------+---------------------------------|
          |  RL  | Yellow |    On    |    Error correction enabled     |
          |------+--------+----------+---------------------------------|
          |  RL  | Yellow |   Off    |    Error correction disabled    |
          |------+--------+----------+---------------------------------|
          |  RL  | Yellow | Blinking |         Error detected          |
          |------+--------+----------+---------------------------------|
          |  RD  | Yellow | Blinking |     Modem is receiving data     |
          |------+--------+----------+---------------------------------|
          |  RD  | Yellow |   Off    |   Modem is not receiving data   |
          |------+--------+----------+---------------------------------|
          |  SD  | Yellow | Blinking |   Modem is transmitting data    |
          |------+--------+----------+---------------------------------|
          |  SD  | Yellow |   Off    | Modem is not transmitting data  |
          |------+--------+----------+---------------------------------|
          |  CD  | Yellow |    On    |     Carrier signal detected     |
          |------+--------+----------+---------------------------------|
          |  CD  | Yellow |   Off    |   Carrier signal not detected   |
          |------+--------+----------+---------------------------------|
          |  OH  | Yellow |    On    |        Modem is off-hook        |
          |------+--------+----------+---------------------------------|
          |  OH  | Yellow |   Off    |        Modem is on-hook         |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                   ANSWER TONE DETECTION                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %In [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls answer tone detection              |
          |------------------------------------------------------------|
          |    Command     |                 Function                  |
          |----------------+-------------------------------------------|
          |      %I0       | Answer tone detection enabled             |
          |----------------+-------------------------------------------|
          |      %I1       | Answer tone detection disabled            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 AUTO REDIAL INTERVAL TIMES                 |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S19=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 2                                            |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Description | Unidentified                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              AUTO-RELIABLE FALLBACK CHARACTER              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %An [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character used as the              |
          |              | auto-reliable fallback character. %A0 will  |
          |              | disable this function                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          AUTO-RELIABLE TIME BUFFER CONFIGURATION           |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the handling of incoming data      |
          |              | during auto-reliable time period            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \CO     | Data is discarded                           |
          |--------------+---------------------------------------------|
          |     \C1      | Data is buffered                            |
          |--------------+---------------------------------------------|
          |     \C2      | Data is discarded, resets to \C1 on receipt |
          |              | of autoreliable fallback character          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        AUTO-RETRAIN                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT %En                                      |
          |--------------+---------------------------------------------|
          | Description: | Selects auto-retrain mode                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %E0      | Auto-retrain disabled                       |
          |--------------+---------------------------------------------|
          |     %E1      | Three auto-retrains attempted then hang up  |
          |              | for 2400bps and above enabled               |
          |--------------+---------------------------------------------|
          |    í %E2     | Three auto-retrains attempted then hang up  |
          |              | for 2400bps and above enabled               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S14                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S14=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 136                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-254                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls echo, result codes, result code    |
          |              | display, dumb mode, dial mode, dumb modem   |
          |              | and answer/originate mode                   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Command echo disabled                       |
          |      |       |                                             |
          |      |     1 | Command echo enabled                        |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Result codes enabled                        |
          |      |       |                                             |
          |      |     1 | Result codes disabled                       |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Display result codes in numeric format      |
          |      |       |                                             |
          |      |   í 1 | Display result codes in verbose format      |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Smart mode                                  |
          |      |       |                                             |
          |      |     1 | Dumb mode                                   |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Tone dial enabled                           |
          |      |       |                                             |
          |      |     1 | Pulse dial enabled                          |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Smart modem                                 |
          |      |       |                                             |
          |      |     1 | Dumb modem                                  |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Answer mode enabled                         |
          |      |       |                                             |
          |      |   í 1 | Originate mode enabled                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S21                   |
          |------------------------------------------------------------|
          | Format:          | AT [cmds] S20=n [cmds]                  |
          |------------------+-----------------------------------------|
          | Default:         | 176                                     |
          |------------------+-----------------------------------------|
          | Range:           | 0-187                                   |
          |------------------+-----------------------------------------|
          | Description:     | Controls jack type, DSR, DTR, DCD and   |
          |                  | disconnect options                      |
          |------------------------------------------------------------|
          |   Bit    |   Value   |              Function               |
          |----------+-----------+-------------------------------------|
          |    0     |       í 0 | RJ-11/41S/45S                       |
          |          |           |                                     |
          |          |         1 | RJ12-12/13                          |
          |------------------------------------------------------------|
          |      1       |     í 0 | DSR forced high                   |
          |              |         |                                   |
          |              |       1 | DSR normal                        |
          |--------------+---------+-----------------------------------|
          |      2       |       0 | Not used                          |
          |--------------+---------+-----------------------------------|
          |     4, 3     |      00 | Ignore DTR                        |
          |              |         |                                   |
          |              |      01 | Go to command mode on low DTR     |
          |              |         |                                   |
          |              |    í 10 | Hang up on low DTR                |
          |              |         |                                   |
          |              |      11 | Initialize on low DTR             |
          |--------------+---------+-----------------------------------|
          |      5       |       0 | DCD forced high                   |
          |              |         |                                   |
          |              |     í 1 | Normal operation                  |
          |--------------+---------+-----------------------------------|
          |     7, 6     |      00 | Special disconnect disabled       |
          |              |         |                                   |
          |              |      01 | Long space disconnect enabled     |
          |              |         |                                   |
          |              |    í 10 | Clear down disconnect enabled     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S22                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S22=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 118                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped.                                 |
          |--------------+---------------------------------------------|
          | Description: | Controls volume and speaker settings,       |
          |              | result codes, and make/break pulse ratio    |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |    00 | Lowest volume setting                       |
          |      |       |                                             |
          |      |    01 | Low volume setting                          |
          |      |       |                                             |
          |      |  í 10 | Medium volume setting                       |
          |      |       |                                             |
          |      |    11 | Highest volume setting                      |
          |------+-------+---------------------------------------------|
          | 3, 2 |    00 | Speaker disabled                            |
          |      |       |                                             |
          |      |  í 01 | Speaker enabled until carrier signal        |
          |      |       | detected                                    |
          |      |    10 |                                             |
          |      |       | Speaker enabled                             |
          |      |    11 |                                             |
          |      |       | Speaker enabled until carrier signal        |
          |      |       | detected, but disable during dialing        |
          |------+-------+---------------------------------------------|
          | 6, 5 |   000 | Numeric result codes enabled                |
          |  ,4  |       |                                             |
          |      |   001 | Verbose result codes enabled                |
          |      |       |                                             |
          |      |   010 | Dialtone detection enabled                  |
          |      |       |                                             |
          |      |   011 | Busy tone detection enabled                 |
          |      |       |                                             |
          |      | í 100 | Busy and dialtone detection enabled         |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | 39/61ms at 10pps (North America)            |
          |      |       |                                             |
          |      |     1 | 33/67ms at 10pps (Europe)                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S24                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S24=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 0                                        |
          |-----------------+------------------------------------------|
          | Range:          | 0-7                                      |
          |-----------------+------------------------------------------|
          | Description:    | Controls V.25bis options                 |
          |------------------------------------------------------------|
          |   Bit   | Value  |                Function                 |
          |---------+--------+-----------------------------------------|
          |    0    |    í 0 | V.25bis disabled                        |
          |         |        |                                         |
          |         |      1 | V.25bis enabled                         |
          |------------------------------------------------------------|
          |      1      | í 0 | V.25bis asynchronous enabled           |
          |             |     |                                        |
          |             |   1 | V.25bis synchronous enabled            |
          |-------------+-----+----------------------------------------|
          |      2      | í 0 | V.25bis HDLC enabled                   |
          |             |     |                                        |
          |             |   1 | V.25bis bisynchronous enabled          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S27                   |
          |------------------------------------------------------------|
          | Format:          | AT [cmds] S27=n [cmds]                  |
          |------------------+-----------------------------------------|
          | Default:         | 0                                       |
          |------------------+-----------------------------------------|
          | Range:           | 0-236                                   |
          |------------------+-----------------------------------------|
          | Description:     | Controls synchronous mode, pulse dial   |
          |                  | speed, clock source, and data protocol  |
          |------------------------------------------------------------|
          |    Bit    |  Value   |              Function               |
          |-----------+----------+-------------------------------------|
          |  2, 1, 0  |    í 000 | Asynchronous operation              |
          |           |          |                                     |
          |           |      001 | Synchronous mode 1 operation        |
          |           |          |                                     |
          |           |      010 | Synchronous mode 2 operation        |
          |           |          |                                     |
          |           |      011 | Synchronous mode 3 operation        |
          |           |          |                                     |
          |           |      100 | Asynchronous dial                   |
          |------------------------------------------------------------|
          |      3       |     í 0 | Standard pulse dial enabled       |
          |              |         |                                   |
          |              |       1 | Fast pulse dial enabled           |
          |--------------+---------+-----------------------------------|
          |     5, 4     |    í 00 | Local DCE transmit clock enabled  |
          |              |         |                                   |
          |              |      01 | Local DTE transmit clock enabled  |
          |              |         |                                   |
          |              |      10 | Remote DCE transmit enabled       |
          |--------------+---------+-----------------------------------|
          |     7, 6     |    í 00 | V.21, V.22, V.32 enabled          |
          |              |         |                                   |
          |              |      01 | Bell 103A/212A                    |
          |              |         |                                   |
          |              |      10 | V.23 back channel                 |
          |              |         |                                   |
          |              |      11 | V.23 main channel                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S29                   |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] S29=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | 3                                         |
          |----------------+-------------------------------------------|
          | Range:         | 31                                        |
          |----------------+-------------------------------------------|
          | Description:   | Controls data bits, parity and stop bits  |
          |------------------------------------------------------------|
          |   Bit    |     Value     |            Function             |
          |----------+---------------+---------------------------------|
          |   1, 0   |            00 | 5 data bits                     |
          |          |               |                                 |
          |          |            01 | 6 data bits                     |
          |          |               |                                 |
          |          |            10 | 7 data bits                     |
          |          |               |                                 |
          |          |          í 11 | 8 data bits                     |
          |------------------------------------------------------------|
          |    3, 2     |                 í 00 | No parity             |
          |             |                      |                       |
          |             |                   01 | Space parity          |
          |             |                      |                       |
          |             |                   10 | Even parity           |
          |             |                      |                       |
          |             |                   11 | Odd parity            |
          |-------------+----------------------+-----------------------|
          |      4      |                  í 0 | 1 stop bit            |
          |             |                      |                       |
          |             |                    1 | 2 stop bits           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S32                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S32=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 17                                       |
          |-----------------+------------------------------------------|
          | Range:          | 0-191                                    |
          |-----------------+------------------------------------------|
          | Description:    | Controls ring, call back security,       |
          |                 | hardware data security, message working  |
          |                 | bit, V.32 forward/backward link, &Z/@Z   |
          |                 | working bit and line used                |
          |------------------------------------------------------------|
          |   Bit    | Value  |                Function                |
          |----------+--------+----------------------------------------|
          |    0     |      0 | Ring disabled                          |
          |          |        |                                        |
          |          |    í 1 | Ring enabled                           |
          |------------------------------------------------------------|
          |      1       |  í 0 | Call back security disabled          |
          |              |      |                                      |
          |              |    1 | Call back security enabled           |
          |--------------+------+--------------------------------------|
          |      2       |  í 0 | Hardware data security disabled      |
          |              |      |                                      |
          |              |    1 | Hardware data security enabled       |
          |--------------+------+--------------------------------------|
          |      3       |  í 0 | Open message working bit             |
          |              |      |                                      |
          |              |    1 | Close message working bit            |
          |--------------+------+--------------------------------------|
          |      4       |    0 | V.32 forward/backward link disabled  |
          |              |      |                                      |
          |              |  í 1 | V.32 forward/backward link enabled   |
          |--------------+------+--------------------------------------|
          |      5       |  í 0 | &Z working bit enabled               |
          |              |      |                                      |
          |              |    1 | @Z working bit enabled               |
          |--------------+------+--------------------------------------|
          |     7, 6     | í 00 | Switched line enabled                |
          |              |      |                                      |
          |              |   01 | 2 wire leased line enabled           |
          |              |      |                                      |
          |              |   10 | 4 wire leased line enabled           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S34                   |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] S34=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | 0                                         |
          |----------------+-------------------------------------------|
          | Range:         | 0-63                                      |
          |----------------+-------------------------------------------|
          | Description:   | Controls V.32 TCM/QAM, DTR dump           |
          |                | recognition, RLSD level, asynchronous and |
          |                | soft reset                                |
          |------------------------------------------------------------|
          |   Bit   | Value |                 Function                 |
          |---------+-------+------------------------------------------|
          |    0    |   í 0 | Enable trellis code modulation           |
          |         |       |                                          |
          |         |     1 | Enable quadratic amplitude modulation    |
          |------------------------------------------------------------|
          |      1      |  í | Recognize DTR dump in handshaking       |
          |             |  0 |                                         |
          |             |    | Ignore DTR dump in handshaking          |
          |             |  1 |                                         |
          |-------------+----+-----------------------------------------|
          |    3, 2     |  í | RLSD on at, -43dbm off at -48dbm        |
          |             | 00 |                                         |
          |             |    | RLSD on at, -33dbm off at -38dbm        |
          |             | 01 |                                         |
          |             |    | RLSD on at, -26dbm off at -31dbm        |
          |             | 10 |                                         |
          |             |    | RLSD on at, -16dbm off at -21dbm        |
          |             | 11 |                                         |
          |-------------+----+-----------------------------------------|
          |    5, 4     |  í | Normal AT&F ATZ                         |
          |             | 00 |                                         |
          |             |    | Quick ATZ.2                             |
          |             | 01 |                                         |
          |             |    | Quick AT&F ATZ                          |
          |             | 10 |                                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S35                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S35=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 15                                       |
          |-----------------+------------------------------------------|
          | Range:          | 0-232                                    |
          |-----------------+------------------------------------------|
          | Description:    | Controls Power on auto dial              |
          |------------------------------------------------------------|
          |    Bit    | Value |                Function                |
          |-----------+-------+----------------------------------------|
          | 3, 2, 1,  |  0000 | STN for power on auto dial             |
          |     0     |       |                                        |
          |           |     í | Power on auto dial disabled            |
          |           |  1000 |                                        |
          |------------------------------------------------------------|
          |     5, 4     |   í | Restore all disabled                  |
          |              |  00 |                                       |
          |              |     | Switched line simulates leased line   |
          |              |  01 | enabled                               |
          |              |     |                                       |
          |              |  10 | Switched line back up enabled         |
          |--------------+-----+---------------------------------------|
          |      6       | í 0 | Single phone system enabled           |
          |              |     |                                       |
          |              |   1 | Multiple phone systems enabled        |
          |--------------+-----+---------------------------------------|
          |      7       | í 0 | Disconnect reset disabled             |
          |              |     |                                       |
          |              |   1 | Disconnect reset enabled              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S39                   |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] S39=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | 153                                       |
          |----------------+-------------------------------------------|
          | Range:         | 0-253                                     |
          |----------------+-------------------------------------------|
          | Description:   | Controls compression, auto retrain answer |
          |                | tone check, compromise equalizer and      |
          |                | detect phase                              |
          |------------------------------------------------------------|
          |   Bit   | Value |                 Function                 |
          |---------+-------+------------------------------------------|
          |    0    |     0 | Data compression disabled                |
          |         |       |                                          |
          |         |   í 1 | Data compression enabled                 |
          |------------------------------------------------------------|
          |    2, 1     | 00 | Auto retrain disabled                   |
          |             |    |                                         |
          |             |  í | Auto retrain on same speed              |
          |             | 01 |                                         |
          |             |    | Auto retrain with speed change          |
          |             | 10 |                                         |
          |-------------+----+-----------------------------------------|
          |    4, 3     | 00 | Disabled                                |
          |             |    |                                         |
          |             | 01 | Transmit only                           |
          |             |    |                                         |
          |             | 10 | Receive only                            |
          |             |    |                                         |
          |             |  í | Transmit and receive                    |
          |             | 11 |                                         |
          |-------------+----+-----------------------------------------|
          |      5      |  í | Answer tone check enabled               |
          |             |  0 |                                         |
          |             |    | Answer tone check disabled              |
          |             |  1 |                                         |
          |-------------+----+-----------------------------------------|
          |      6      |  í | Compromise equalizer enabled            |
          |             |  0 |                                         |
          |             |    | Compromise equalizer disabled           |
          |             |  1 |                                         |
          |-------------+----+-----------------------------------------|
          |      7      |  0 | Detect phase disabled                   |
          |             |    |                                         |
          |             |  í | Detect phase enabled                    |
          |             |  1 |                                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S40                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S40=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 0                                        |
          |-----------------+------------------------------------------|
          | Range:          | 0-33                                     |
          |-----------------+------------------------------------------|
          | Description:    | Controls remote access and remote access |
          |                 | security                                 |
          |------------------------------------------------------------|
          |   Bit   |  Value   |               Function                |
          |---------+----------+---------------------------------------|
          |    0    |      í 0 | Remote access disabled                |
          |         |          |                                       |
          |         |        1 | Remote access enabled                 |
          |------------------------------------------------------------|
          |  4, 3, 2, 1  |  0000 | Not used                            |
          |--------------+-------+-------------------------------------|
          |      5       |   í 0 | Remote access security disabled     |
          |              |       |                                     |
          |              |     1 | Remote access security enabled      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S43                   |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] S43=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | 19                                        |
          |----------------+-------------------------------------------|
          | Range:         | 0-155                                     |
          |----------------+-------------------------------------------|
          | Description:   | Controls MNP block size, dictionary size  |
          |                | and data buffer                           |
          |------------------------------------------------------------|
          |   Bit    | Value |                Function                 |
          |----------+-------+-----------------------------------------|
          |   1, 0   |    00 | Maximum MNP block size 64 characters    |
          |          |       |                                         |
          |          |    01 | Maximum MNP block size 128 characters   |
          |          |       |                                         |
          |          |    10 | Maximum MNP block size 192 characters   |
          |          |       |                                         |
          |          |  í 11 | Maximum MNP block size 256 characters   |
          |------------------------------------------------------------|
          |      2      |   0 | Not used                               |
          |-------------+-----+----------------------------------------|
          |    4, 3     |  00 | Maximum dictionary size 512 entries    |
          |             |     |                                        |
          |             |  01 | Maximum dictionary size 1024 entries   |
          |             |     |                                        |
          |             |   í | Maximum dictionary size 2048 entries   |
          |             |  10 |                                        |
          |             |     | Maximum dictionary size 4048 entries   |
          |             |  11 |                                        |
          |-------------+-----+----------------------------------------|
          |      5      |   0 | Not used                               |
          |-------------+-----+----------------------------------------|
          |    7, 6     |   í | Disable data buffer                    |
          |             |  00 |                                        |
          |             |     | Set buffer to 4 seconds, 200           |
          |             |  01 | characters or SYN character detected   |
          |             |     | then switch to normal connection       |
          |             |  10 |                                        |
          |             |     | Data buffer disabled, switch to normal |
          |             |     | connection                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S44                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S44=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 0                                        |
          |-----------------+------------------------------------------|
          | Range:          | 140                                      |
          |-----------------+------------------------------------------|
          | Description:    | Controls echo, flow control and serial   |
          |                 | port speed.                              |
          |------------------------------------------------------------|
          |   Bit    | Value  |                Function                |
          |----------+--------+----------------------------------------|
          |    2     |    í 0 | On line data echo disabled             |
          |          |        |                                        |
          |          |      1 | On line data echo enabled              |
          |------------------------------------------------------------|
          |      3       | í 0 | Modem port flow control disabled      |
          |              |     |                                       |
          |              |   1 | Modem port flow control enabled       |
          |--------------+-----+---------------------------------------|
          |   6, 5, 4    | 000 | Not used                              |
          |--------------+-----+---------------------------------------|
          |      7       | í 0 | Serial port speed locked              |
          |              |     |                                       |
          |              |   1 | Serial port speed follows connection  |
          |              |     | speed                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S45                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S45=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 101                                      |
          |-----------------+------------------------------------------|
          | Range:          | 253                                      |
          |-----------------+------------------------------------------|
          | Description:    | Controls break control, link type, DTE   |
          |                 | speed and mode                           |
          |------------------------------------------------------------|
          |    Bit    | Value |                Function                |
          |-----------+-------+----------------------------------------|
          |  2, 1, 0  |   000 | Enter command mode, do not send break  |
          |           |       |                                        |
          |           |   001 | Clear buffer, send break immediately   |
          |           |       |                                        |
          |           |   010 | Enter command mode, do not send break  |
          |           |       |                                        |
          |           |   011 | Do not clear buffer, send break        |
          |           |       | immediately                            |
          |           |   100 |                                        |
          |           |       | Enter command mode, do not send break  |
          |           | í 101 |                                        |
          |           |       | Send break with transmitted data       |
          |------------------------------------------------------------|
          |      3       |   í 0 | Stream link enabled                 |
          |              |       |                                     |
          |              |     1 | Block link enabled                  |
          |--------------+-------+-------------------------------------|
          |      4       |   í 0 | DTE speed follows connect speed     |
          |              |       |                                     |
          |              |     1 | DTE speed locked                    |
          |--------------+-------+-------------------------------------|
          |   7, 6, 5    |   000 | Normal mode                         |
          |              |       |                                     |
          |              |   001 | Direct mode                         |
          |              |       |                                     |
          |              |   010 | MNP mode                            |
          |              |       |                                     |
          |              | í 011 | Auto reliable mode                  |
          |              |       |                                     |
          |              |   100 | LAPM mode                           |
          |              |       |                                     |
          |              |   101 | LAPM with fallback to normal mode   |
          |              |       |                                     |
          |              |   110 | LAPM with fallback to MNP mode      |
          |              |       |                                     |
          |              |   111 | MNP with fallback to normal mode    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S46                   |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] S46=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | 75                                        |
          |----------------+-------------------------------------------|
          | Range:         | 0-238                                     |
          |----------------+-------------------------------------------|
          | Description:   | Controls flow control, ring indicate and  |
          |                | result codes                              |
          |------------------------------------------------------------|
          |   Bit    | Value |                Function                 |
          |----------+-------+-----------------------------------------|
          | 2, 1, 0  |   000 | Flow control disabled                   |
          |          |       |                                         |
          |          |   001 | XON/XOFF flow control enabled           |
          |          |       |                                         |
          |          |   010 | Unidirectional hardware flow control    |
          |          |       | enabled                                 |
          |          | í 011 |                                         |
          |          |       | Bidirectional hardware flow control     |
          |          |   100 | enabled                                 |
          |          |       |                                         |
          |          |   101 | Unidirectional XON/XOFF flow control    |
          |          |       | enabled                                 |
          |          |   110 |                                         |
          |          |       | CTS low until connect, then CTS         |
          |          |       | unidirectional flow control enabled     |
          |          |       |                                         |
          |          |       | CTS low until connect, then RTS/CTS     |
          |          |       | flow control enabled                    |
          |------------------------------------------------------------|
          |      3      |    0 | Ring indicate after handshaking       |
          |             |      | enabled                               |
          |             |  í 1 |                                       |
          |             |      | Ring indicate after handshaking       |
          |             |      | disabled                              |
          |-------------+------+---------------------------------------|
          |   6, 5, 4   |  000 | V.42/MNP result code disabled         |
          |             |      |                                       |
          |             |  001 | V.42/MNP4 and DTE speed result codes  |
          |             |      | enabled                               |
          |             |  010 |                                       |
          |             |      | V.42/MNP4 and DCE speed result codes  |
          |             |  011 | enabled                               |
          |             |      |                                       |
          |             |    í | V.42bis/MNP5 and DTE speed result     |
          |             |  100 | codes enabled                         |
          |             |      |                                       |
          |             |  101 | V.42bis/MNP5 and DCE speed result     |
          |             |      | codes enabled                         |
          |             |  110 |                                       |
          |             |      | V.42bis/MNP5 and DTE debug codes      |
          |             |      | enabled                               |
          |             |      |                                       |
          |             |      | V.42bis/MNP5 and DCE debug codes      |
          |             |      | enabled                               |
          |-------------+------+---------------------------------------|
          |      7      |  í 0 | Flow control character trapped        |
          |             |      |                                       |
          |             |    1 | Flow control character passed through |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S53                   |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S53=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 56                                       |
          |-----------------+------------------------------------------|
          | Range:          | 0-56                                     |
          |-----------------+------------------------------------------|
          | Description:    | Controls ring indicate reset timer, V.25 |
          |                 | calling tone and T30 calling tone        |
          |------------------------------------------------------------|
          |    Bit    |   Value   |              Function              |
          |-----------+-----------+------------------------------------|
          | 3, 2, 1,  |    í 1000 | Ring indicate reset timer          |
          |     0     |           |                                    |
          |------------------------------------------------------------|
          |      4       |           0 | V.25 calling tone disabled    |
          |              |             |                               |
          |              |         í 1 | V.25 calling tone enabled     |
          |--------------+-------------+-------------------------------|
          |      5       |           0 | T30 calling tone disabled     |
          |              |             |                               |
          |              |         í 1 | T30 calling tone enabled      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK SEND                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 3                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-9                                         |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sends break to modem                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK TYPE                         |
          |------------------------------------------------------------|
          | Type:           | Configuration                            |
          |-----------------+------------------------------------------|
          | Format:         | AT [cmds] \Kn [cmds]                     |
          |-----------------+------------------------------------------|
          | Description:    | Configures action of break signal        |
          |------------------------------------------------------------|
          | Command  |                 Break from DTE                  |
          |------------------------------------------------------------|
          |    \K0    | Online command mode enabled, send no break to  |
          |           | remote modem                                   |
          |-----------+------------------------------------------------|
          |    \K1    | Break sent to remote modem and buffers cleared |
          |-----------+------------------------------------------------|
          |    \K2    | Online command mode enabled, send no break to  |
          |           | remote modem                                   |
          |-----------+------------------------------------------------|
          |    \K3    | Send break to remote modem immediately         |
          |-----------+------------------------------------------------|
          |    \K4    | Online command mode enabled, send no break to  |
          |           | remote modem                                   |
          |-----------+------------------------------------------------|
          |    \K5    | Send break with transmitted data               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CALL BACK DELAY TIMER                    |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S31=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 10                                           |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | 1 second                                     |
          |-------------+----------------------------------------------|
          | Description | Controls call back delay                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CALLBACK NUMBER                       |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] @Zn=xxx [cmds]                     |
          |-------------+----------------------------------------------|
          | Default     | None                                         |
          |-------------+----------------------------------------------|
          | Description | Stores numbers to be called back during      |
          |             | callback operation. N is a memory location   |
          |             | from 0-9 and xxx is a combination of the     |
          |             | number and up to 49 dial modifiers.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     CALLBACK PASSWORD                      |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] @Wn=xxxxxxxxxx [cmds]              |
          |-------------+----------------------------------------------|
          | Default     | None                                         |
          |-------------+----------------------------------------------|
          | Range       | A-Z, a-z,0-9                                 |
          |-------------+----------------------------------------------|
          | Unit        | ASCII string                                 |
          |-------------+----------------------------------------------|
          | Description | Stores callback password (n is password and  |
          |             | xxxxxxxxxx is up to ten characters)          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     CALLBACK SECURITY                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @An [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Modem returns call to previously stored     |
          |              | number                                      |
          |------------------------------------------------------------|
          |       Command        |              Function               |
          |----------------------+-------------------------------------|
          |        í @A0         | Callback security disabled          |
          |----------------------+-------------------------------------|
          |         @A1          | Callback security enabled           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CALL BACK SECURITY DELAY                  |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] @Dn [cmds]                         |
          |-------------+----------------------------------------------|
          | Default     | 30                                           |
          |-------------+----------------------------------------------|
          | Range       | 1-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | 1 second                                     |
          |-------------+----------------------------------------------|
          | Description | Sets length of wait before dialing stored    |
          |             | callback security phone number               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CARRIER DETECT TIMER                    |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S17=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 10                                           |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Description | Unidentified                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CLOSING MESSAGE                       |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] @Gxxx [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | THANK YOU! YOU WILL BE CALLED BACK!          |
          |-------------+----------------------------------------------|
          | Range       | Up to 60 characters                          |
          |-------------+----------------------------------------------|
          | Unit        | ASCII                                        |
          |-------------+----------------------------------------------|
          | Description | Stores a closing message                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONNECTION PASSWORD SECURITY                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @En [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Requires correct password to be included in |
          |              | dial command string                         |
          |------------------------------------------------------------|
          |        Command        |              Function              |
          |-----------------------+------------------------------------|
          |         í @E0         | Password security disabled         |
          |-----------------------+------------------------------------|
          |          @E1          | Password security enabled          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT %Cn                                      |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %C0      | Data compression disabled                   |
          |--------------+---------------------------------------------|
          |    í %C1     | MNP5 and V.42bis enabled                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CONNECT MODE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets connect mode                           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \N0      | Normal mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N1      | Direct mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N2      | MNP reliable mode only enabled              |
          |--------------+---------------------------------------------|
          |    í \N3     | V.42 and MNP modes enabled                  |
          |--------------+---------------------------------------------|
          |     \N4      | V.42bis and V.42 modes enabled              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CONNECTION PASSWORD                     |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] @Pxxxxxxxxx [cmds]                 |
          |-------------+----------------------------------------------|
          | Default     | None                                         |
          |-------------+----------------------------------------------|
          | Range       | A-Z,a-z,0-9,*,#                              |
          |-------------+----------------------------------------------|
          | Unit        | ASCII string                                 |
          |-------------+----------------------------------------------|
          | Description | Stores password required by command string   |
          |             | password security option of up to nine       |
          |             | characters                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED UPPER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the current DCE speed.              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í %B0     | Line speed sets maximum serial port speed   |
          |--------------+---------------------------------------------|
          |    %B300     | 300bps                                      |
          |--------------+---------------------------------------------|
          |    %B600     | 600bps                                      |
          |--------------+---------------------------------------------|
          |    %B1200    | 1200bps                                     |
          |--------------+---------------------------------------------|
          |    %B2400    | 2400bps                                     |
          |--------------+---------------------------------------------|
          |    %B4800    | 4800bps                                     |
          |--------------+---------------------------------------------|
          |    %B7200    | 7200bps                                     |
          |--------------+---------------------------------------------|
          |    %B9600    | 9600bps                                     |
          |--------------+---------------------------------------------|
          |   %B12000    | 12.0Kbps                                    |
          |--------------+---------------------------------------------|
          |   %B16800    | 16.8Kbps                                    |
          |--------------+---------------------------------------------|
          |   %B14400    | 14.4Kbps                                    |
          |--------------+---------------------------------------------|
          |   %B19200    | 19.2Kbps                                    |
          |--------------+---------------------------------------------|
          |   %B21600    | 21.6Kbps                                    |
          |--------------+---------------------------------------------|
          |   %B24000    | 24.0Kbps                                    |
          |--------------+---------------------------------------------|
          |   %B26400    | 26.4Kbps                                    |
          |--------------+---------------------------------------------|
          |   %B28800    | 28.8Kbps                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      DIAL TONE DETECT                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] W [cmds]                          |
          |--------------+---------------------------------------------|
          | Description: | Requires a continuous three second dial     |
          |              | tone before dialing                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DISPLAY CALLBACK SETTINGS                  |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Displays passwords, messages and phone      |
          |              | numbers stored in memory                    |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |      @V0      | Display stored callback security passwords |
          |---------------+--------------------------------------------|
          |      @V1      | Display stored callback security phone     |
          |               | numbers                                    |
          |---------------+--------------------------------------------|
          |      @V2      | Display opening and closing messages       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DISPLAY PASSWORDS                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @Fn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Displays callback security and remote       |
          |              | access passwords                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         DTR DELAY                          |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S25=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 5                                            |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | 1 second                                     |
          |-------------+----------------------------------------------|
          | Description | Sets length of time modem ignores DTR change |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         DUMB MODE                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @In [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls smart and dumb modes               |
          |------------------------------------------------------------|
          |         Command         |             Function             |
          |-------------------------+----------------------------------|
          |          í @I0          | Smart mode                       |
          |-------------------------+----------------------------------|
          |           @I1           | Dumb mode                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FLOW CONTROL TYPE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Qn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets type of flow control used by modem     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \Q0      | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |     \Q1      | XON/XOFF flow control enabled               |
          |--------------+---------------------------------------------|
          |     \Q2      | CTS flow control to DTE enabled             |
          |--------------+---------------------------------------------|
          |    í \Q3     | RTS/CTS flow control enabled                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FLOW CONTROL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Gn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects modem port flow control             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \G0     | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |     \G1      | Flow control enabled                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       HANG UP DELAY                        |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S38=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 0                                            |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Description | Sets time before forced hang up, n=255       |
          |             | disables                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Tn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem does |
          |              | not receive information before it           |
          |              | disconnects                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S47=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 0                                            |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Description | Sets time modem waits before disconnecting   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              LEASED LINE DIALUP BACKUP TIMES               |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S13=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Unidentified                                |
          |--------------+---------------------------------------------|
          | Description: | After leased line failure, modem attempts   |
          |              | to reconnect after specified delay          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              LEASED LINE DIALUP BACKUP TIMER               |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S15=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 5                                            |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Description | Unidentified                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     LEASED LINE RETRY                      |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] -Bn [cmds]                         |
          |-------------+----------------------------------------------|
          | Range       | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Unit        | Retries                                      |
          |-------------+----------------------------------------------|
          | Description | Controls the number of times a leased line   |
          |             | connection is attempted                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     LINE SIGNAL LEVEL                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %L [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Returns received line signal level          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 LEASED LINE TRANSMIT LEVEL                 |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S51=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 10                                           |
          |-------------+----------------------------------------------|
          | Range       | 0-31                                         |
          |-------------+----------------------------------------------|
          | Unit        | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Description | Sets leased line transmit level              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         LINE TYPE                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @Yn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects line type                           |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |     í @Y0     | Switched line operation                    |
          |---------------+--------------------------------------------|
          |      @Y1      | Switched line operation emulates leased    |
          |               | line operation                             |
          |---------------+--------------------------------------------|
          |      @Y2      | Leased line with switched line backup      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          LOCK DCE                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Hn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls DCE speed                          |
          |------------------------------------------------------------|
          |    Command     |                 Function                  |
          |----------------+-------------------------------------------|
          |      %H0       | DCE speed not locked                      |
          |----------------+-------------------------------------------|
          |      %H1       | DCE speed locked                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      LOCK SERIAL PORT                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Jn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets operation of serial port speed         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \J0     | Serial speed locked                         |
          |--------------+---------------------------------------------|
          |     \J1      | Serial speed follows connect speed          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            MAXIMUM BLOCK SIZE FOR TRANSMISSION             |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \An [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum transmittable block size   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \A0      | MNP block size is 64 characters             |
          |--------------+---------------------------------------------|
          |     \A1      | MNP block size is 128 characters            |
          |--------------+---------------------------------------------|
          |     \A2      | MNP block size is 192 characters            |
          |--------------+---------------------------------------------|
          |    í \A3     | MNP block size is 256 characters            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      OPENING MESSAGE                       |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] @Oxxx [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | PLEASE ENTER CALL BACK PASSWORD              |
          |-------------+----------------------------------------------|
          | Range       | Up to 60 characters                          |
          |-------------+----------------------------------------------|
          | Unit        | ASCII string                                 |
          |-------------+----------------------------------------------|
          | Description | Stores an opening message                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          PROTOCOL                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] -Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls protocol used                      |
          |------------------------------------------------------------|
          |     Command     |                 Function                 |
          |-----------------+------------------------------------------|
          |       -V0       | V.34 auto                                |
          |-----------------+------------------------------------------|
          |       -V1       | V.FC auto                                |
          |-----------------+------------------------------------------|
          |       -V3       | V.32bis auto                             |
          |-----------------+------------------------------------------|
          |       -V4       | V.34/V.FC/V.32bis                        |
          |-----------------+------------------------------------------|
          |       -V5       | V.34 only                                |
          |-----------------+------------------------------------------|
          |       -V6       | V.FC only                                |
          |-----------------+------------------------------------------|
          |       -V7       | V.32bis only                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          PROTOCOL                          |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S54=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Controls protocol used                      |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |    í S54=0    | V.34 auto mode                             |
          |---------------+--------------------------------------------|
          |     S54=1     | V.FC auto mode                             |
          |---------------+--------------------------------------------|
          |     S54=3     | V.32bis auto mode                          |
          |---------------+--------------------------------------------|
          |     S54=4     | V.34, V.FC and V.32bis                     |
          |---------------+--------------------------------------------|
          |     S54=5     | V.FC and V.32bis                           |
          |---------------+--------------------------------------------|
          |     S54=6     | V.34 only                                  |
          |---------------+--------------------------------------------|
          |     S54=7     | V.FC only                                  |
          |---------------+--------------------------------------------|
          |     S54=8     | V.32bis only                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                           REDIAL                           |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] N=n [cmds]                         |
          |-------------+----------------------------------------------|
          | Default     | 0                                            |
          |-------------+----------------------------------------------|
          | Range       | 0-15                                         |
          |-------------+----------------------------------------------|
          | Unit        | Redials                                      |
          |-------------+----------------------------------------------|
          | Description | Sets number of redials attempted if busy     |
          |             | signal received                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      REDIAL INTERVAL                       |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] N5=n [cmds]                        |
          |-------------+----------------------------------------------|
          | Default     | 1                                            |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | 2 seconds                                    |
          |-------------+----------------------------------------------|
          | Description | Controls time between redials                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        REDIAL LIMIT                        |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S49=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 15                                           |
          |-------------+----------------------------------------------|
          | Range       | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Unit        | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Description | Sets maximum number of redials               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        REDIAL ORDER                        |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] -Z=nnn [cmds]                      |
          |-------------+----------------------------------------------|
          | Unit        | Phone number memory location                 |
          |-------------+----------------------------------------------|
          | Description | Controls order in which stored numbers are   |
          |             | dialed -Z? displays order                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       REMOTE ACCESS                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *En [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls remote access operation            |
          |------------------------------------------------------------|
          |      Command       |               Function                |
          |--------------------+---------------------------------------|
          |       í *E0        | Remote access disabled                |
          |--------------------+---------------------------------------|
          |        *E1         | Remote access enabled                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             REMOTE ACCESS ATTENTION CHARACTER              |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S41=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 42                                           |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | ASCII                                        |
          |-------------+----------------------------------------------|
          | Description | Selects the remote access attention          |
          |             | character                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   REMOTE ACCESS PASSWORD                   |
          |------------------------------------------------------------|
          | Type        | Configuration                                |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] *Pxxxxxxxxx                        |
          |-------------+----------------------------------------------|
          | Default     | None                                         |
          |-------------+----------------------------------------------|
          | Range       | Up to nine characters                        |
          |-------------+----------------------------------------------|
          | Unit        | ASCII printable characters                   |
          |-------------+----------------------------------------------|
          | Description | Stores remote access password                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   REPORT SIGNAL QUALITY                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Q [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Reports signal quality                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     RESULT CODE FORMAT                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects which result codes are displayed    |
          |------------------------------------------------------------|
          |    Command     |                 Function                  |
          |----------------+-------------------------------------------|
          |      \V0       | Connect speed result codes enabled        |
          |----------------+-------------------------------------------|
          |      \V1       | Connect speed and V.42/MNP result codes   |
          |                | enabled                                   |
          |----------------+-------------------------------------------|
          |      \V2       | Connect speed, V.42/MNP and data          |
          |                | compression result codes enabled          |
          |----------------+-------------------------------------------|
          |      \V3       | Connect speed, V.42/MNP and data          |
          |                | compression result codes enabled          |
          |----------------+-------------------------------------------|
          |      \V4       | Connect speed, V.42/MNP and data          |
          |                | compression result codes enabled          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                           RINGER                           |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] @Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls ring signal passthrough to modem   |
          |              | speaker                                     |
          |------------------------------------------------------------|
          |          Command          |            Function            |
          |---------------------------+--------------------------------|
          |            @B0            | Ringer disabled                |
          |---------------------------+--------------------------------|
          |           í @B1           | Ringer enabled                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      RTS TO CTS DELAY                      |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S26=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 0                                            |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | .1 second                                    |
          |-------------+----------------------------------------------|
          | Description | Sets delay after receipt of RTS signal until |
          |             | CTS forced high                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                SWITCHED LINE TRANSMIT LEVEL                |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S50=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 10                                           |
          |-------------+----------------------------------------------|
          | Range       | 0-15                                         |
          |-------------+----------------------------------------------|
          | Unit        | Unidentified                                 |
          |-------------+----------------------------------------------|
          | Description | Sets switched line transmit level            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        SERIAL PORT                         |
          |------------------------------------------------------------|
          | Format:          | AT [cmds] S28=n [cmds]                  |
          |------------------+-----------------------------------------|
          | Default:         | 113                                     |
          |------------------+-----------------------------------------|
          | Range:           | 0-243                                   |
          |------------------+-----------------------------------------|
          | Description:     | Controls serial port options, parity    |
          |                  | and data bits                           |
          |------------------------------------------------------------|
          |    Bit    |  Value   |              Function               |
          |-----------+----------+-------------------------------------|
          | 4, 3, 2,  |    00000 | Lock serial port at 75bps           |
          |   1, 0    |          |                                     |
          |           |    00001 | Lock serial port at 110bps          |
          |           |          |                                     |
          |           |    00010 | Lock serial port at 300bps          |
          |           |          |                                     |
          |           |    00011 | Lock serial port at 600bps          |
          |           |          |                                     |
          |           |    00100 | Lock serial port at 1200bps         |
          |           |          |                                     |
          |           |    00101 | Lock serial port at 2400bps         |
          |           |          |                                     |
          |           |    00110 | Lock serial port at 4800bps         |
          |           |          |                                     |
          |           |    00111 | Lock serial port at 7200bps         |
          |           |          |                                     |
          |           |    01000 | Lock serial port at 9600bps         |
          |           |          |                                     |
          |           |    01001 | Lock serial port at 12.0Kbps        |
          |           |          |                                     |
          |           |    01010 | Lock serial port at 14.4Kbps        |
          |           |          |                                     |
          |           |    01011 | Lock serial port at 16.8Kbps        |
          |           |          |                                     |
          |           |    01100 | Lock serial port at 19.2Kbps        |
          |           |          |                                     |
          |           |    01101 | Lock serial port at 21.6Kbps        |
          |           |          |                                     |
          |           |    01110 | Lock serial port at 24.0Kbps        |
          |           |          |                                     |
          |           |    01111 | Lock serial port at 26.4Kbps        |
          |           |          |                                     |
          |           |    10000 | Lock serial port at 28.8Kbps        |
          |           |          |                                     |
          |           |   í10001 | Lock serial port at 38.4Kbps        |
          |           |          |                                     |
          |           |    10010 | Lock serial port at 57.6Kbps        |
          |           |          |                                     |
          |           |    10011 | Lock serial port at 11.52Kbps       |
          |------------------------------------------------------------|
          |      6, 5      |             00 | Even parity              |
          |                |                |                          |
          |                |             01 | Space parity             |
          |                |                |                          |
          |                |             10 | Odd parity               |
          |                |                |                          |
          |                |           í 11 | No parity                |
          |----------------+----------------+--------------------------|
          |       7        |            í 0 | 8 data bits              |
          |                |                |                          |
          |                |              1 | 7 data bits              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     SERIAL PORT SPEED                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S52n [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Controls serial port speed                  |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |    í S52=0    | Serial port speed follows connect speed    |
          |---------------+--------------------------------------------|
          |     S52=1     | Lock serial port at 110bps                 |
          |---------------+--------------------------------------------|
          |     S52=2     | Lock serial port at 300bps                 |
          |---------------+--------------------------------------------|
          |     S52=3     | Lock serial port at 600bps                 |
          |---------------+--------------------------------------------|
          |     S52=4     | Lock serial port at 1200bps                |
          |---------------+--------------------------------------------|
          |     S52=5     | Lock serial port at 2400bps                |
          |---------------+--------------------------------------------|
          |     S52=6     | Lock serial port at 4800bps                |
          |---------------+--------------------------------------------|
          |     S52=7     | Lock serial port at 7200bps                |
          |---------------+--------------------------------------------|
          |     S52=8     | Lock serial port at 9600bps                |
          |---------------+--------------------------------------------|
          |     S52=9     | Lock serial port at 12.0Kbps               |
          |---------------+--------------------------------------------|
          |    S52=10     | Lock serial port at 14.4Kbps               |
          |---------------+--------------------------------------------|
          |    S52=11     | Lock serial port at 16.8Kbps               |
          |---------------+--------------------------------------------|
          |    S52=12     | Lock serial port at 19.2Kbps               |
          |---------------+--------------------------------------------|
          |    S52=13     | Lock serial port at 21.6Kbps               |
          |---------------+--------------------------------------------|
          |    S52=14     | Lock serial port at 24.0Kbps               |
          |---------------+--------------------------------------------|
          |    S52=15     | Lock serial port at 26.4Kbps               |
          |---------------+--------------------------------------------|
          |    S52=16     | Lock serial port at 28.8Kbps               |
          |---------------+--------------------------------------------|
          |    S52=17     | Lock serial port at 38.4Kbps               |
          |---------------+--------------------------------------------|
          |    S52=18     | Lock serial port at 57.6Kbps               |
          |---------------+--------------------------------------------|
          |    S52=19     | Lock serial port at 11.52Kbps              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SERVICE CLASS                        |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S33=n [cmds]                   |
          |-----------------+------------------------------------------|
          | Default:        | 0                                        |
          |-----------------+------------------------------------------|
          | Range:          | 192                                      |
          |-----------------+------------------------------------------|
          | Description:    | Controls MNP link and second channel     |
          |------------------------------------------------------------|
          |   Bit   |  Value   |               Function                |
          |------------------------------------------------------------|
          |      6      |     í 0 | MNP synchronous link enabled       |
          |             |         |                                    |
          |             |       1 | MNP asynchronous link enabled      |
          |-------------+---------+------------------------------------|
          |      7      |     í 0 | Second channel disabled            |
          |             |         |                                    |
          |             |       1 | Second channel enabled             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST MODES                         |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S16=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls loopback tests, analog, digital,   |
          |              | remote digital, and self tests              |
          |------------------------------------------------------------|
          |      Note: Bit 3 is read only                              |
          |------------------------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Local analog loopback disabled              |
          |      |       |                                             |
          |      |     1 | Local analog loopback in enabled            |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Local digital loopback disabled             |
          |      |       |                                             |
          |      |     1 | Local digital loopback in enabled           |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Local digital loopback disabled             |
          |      |       |                                             |
          |      |     1 | Local digital loopback in enabled           |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Modem not in remote digital loopback        |
          |      |       |                                             |
          |      |     1 | Remote digital loopback in progress         |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Remote digital loopback disabled            |
          |      |       |                                             |
          |      |     1 | Remote digital loopback enabled             |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Remote digital loopback w/ self-test        |
          |      |       | disabled                                    |
          |      |     1 |                                             |
          |      |       | Remote digital loopback w/ self-test        |
          |      |       | enabled                                     |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Local analog loopback enabled               |
          |      |       |                                             |
          |      |     1 | Local analog loopback disabled              |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Remote digital loopback enabled             |
          |      |       |                                             |
          |      |     1 | Remote digital loopback disabled            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       V.25bis MODES                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] *Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects type of V.25bis operation           |
          |------------------------------------------------------------|
          |    Command     |                 Function                  |
          |----------------+-------------------------------------------|
          |      *C0       | V.25bis disabled                          |
          |----------------+-------------------------------------------|
          |      *C1       | V.25bis asynchronous enabled              |
          |----------------+-------------------------------------------|
          |      *C2       | V.25bis bi-synchronous enabled            |
          |----------------+-------------------------------------------|
          |      *C3       | V.25bis HDLC enabled                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               V.42bis MAXIMUM STRING LENGTH                |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S42=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 16                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Unidentified                                |
          |--------------+---------------------------------------------|
          | Description: | Selects string size for V.42bis compression |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                WAIT FOR CONNECTION PASSWORD                |
          |------------------------------------------------------------|
          | Type        | Register                                     |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S48=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 15                                           |
          |-------------+----------------------------------------------|
          | Range       | 0-255                                        |
          |-------------+----------------------------------------------|
          | Unit        | 1 second                                     |
          |-------------+----------------------------------------------|
          | Description | Sets length of wait for connection password  |
          |             | after connection                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   XON/XOFF PASS-THROUGH                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Xn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects whether XON/XOFF signals are sent   |
          |              | to remote modem                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í \X0     | XON/XOFF signals trapped by local modem     |
          |--------------+---------------------------------------------|
          |     \X1      | XON/XOFF passed through local modem         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        S REGISTERS                         |
          |------------------------------------------------------------|
          |   Register    |   Default   |           Function           |
          |---------------+-------------+------------------------------|
          |      S49      |     15      |         Redial limit         |
          |---------------+-------------+------------------------------|
          |      S50      |     10      | Switched line transmit level |
          |---------------+-------------+------------------------------|
          |      S51      |     10      |  Leased line transmit level  |
          +------------------------------------------------------------+