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       # PURETEK INDUSTRIAL CO, INC.
       
          14400BPS FAX/MODEM ADAPTER (INT)
       
          Card Type              Fax, Modem (asynchronous)               
          Chip Set               Unidentified                            
          Maximum Data Rate      14.4Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Bus               8-bit ISA                               
          Fax Class              Class I & II                            
          Data Modulation        Bell 103/212A                           
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.23, V.25,  
                                 V.32, V.32bis                           
          Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29      
          Protocol               
          Error                  MNP5, V.42, V.42bis                     
          Correction/Compression 
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        |  Label   |   Function   |  Label  |
          |------------------------------------------------------------|
          | Line in                     |    CN1     | Line out | CN2  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                 Setting                 | Label | Position |
          |-----------------------------------------+-------+----------|
          | í DTR normal                            | SW1/1 |   Off    |
          |-----------------------------------------+-------+----------|
          | Modem ignores DTR                       | SW1/1 |    On    |
          |-----------------------------------------+-------+----------|
          | í Verbose result codes                  | SW1/2 |   Off    |
          |-----------------------------------------+-------+----------|
          | Numeric result codes                    | SW1/2 |    On    |
          |-----------------------------------------+-------+----------|
          | í Result code display enabled           | SW1/3 |    On    |
          |-----------------------------------------+-------+----------|
          | Result code display disabled            | SW1/3 |   Off    |
          |-----------------------------------------+-------+----------|
          | í Local echo enabled                    | SW1/4 |   Off    |
          |-----------------------------------------+-------+----------|
          | Local echo disabled                     | SW1/4 |    On    |
          |-----------------------------------------+-------+----------|
          | í Auto answer disabled                  | SW1/5 |    On    |
          |-----------------------------------------+-------+----------|
          | Auto answer enabled                     | SW1/5 |   Off    |
          |-----------------------------------------+-------+----------|
          | í CD signal normal                      | SW1/6 |   Off    |
          |-----------------------------------------+-------+----------|
          | CD forced high                          | SW1/6 |    On    |
          |-----------------------------------------+-------+----------|
          | í Load Y or Y1 configuration from NVRAM | SW1/7 |   Off    |
          |-----------------------------------------+-------+----------|
          | Load &F0 generic template configuration | SW1/7 |    On    |
          | from ROM                                |       |          |
          |-----------------------------------------+-------+----------|
          | í Smart mode                            | SW1/8 |    On    |
          |-----------------------------------------+-------+----------|
          | Dumb mode                               | SW1/8 |   Off    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    SERIAL PORT ADDRESS                     |
          |------------------------------------------------------------|
          |    Setting    |   JP1/A   |  JP1/B   |  JP1/C   |  JP1/D   |
          |---------------+-----------+----------+----------+----------|
          |  COM1 (3F8h)  |    On     |   Off    |   Off    |   Off    |
          |---------------+-----------+----------+----------+----------|
          | í COM2 (2F8h) |    Off    |    On    |   Off    |   Off    |
          |---------------+-----------+----------+----------+----------|
          |  COM3 (3E8h)  |    Off    |   Off    |    On    |   Off    |
          |---------------+-----------+----------+----------+----------|
          |  COM4 (2E8h)  |    Off    |   Off    |   Off    |    On    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         INTERRUPT                          |
          |------------------------------------------------------------|
          | Setting  |  JP2/A  |  JP2/B  |  JP2/C  |  JP2/D  |  JP2/E  |
          |----------+---------+---------+---------+---------+---------|
          |    2     |   On    |   Off   |   Off   |   Off   |   Off   |
          |----------+---------+---------+---------+---------+---------|
          |   í 3    |   Off   |   On    |   Off   |   Off   |   Off   |
          |----------+---------+---------+---------+---------+---------|
          |    4     |   Off   |   Off   |   On    |   Off   |   Off   |
          |----------+---------+---------+---------+---------+---------|
          |    5     |   Off   |   Off   |   Off   |   On    |   Off   |
          |----------+---------+---------+---------+---------+---------|
          |    7     |   Off   |   Off   |   Off   |   Off   |   On    |
          +------------------------------------------------------------+
       
          +---------------------------------------------------------+
          |                  SUPPORTED COMMAND SET                  |
          |---------------------------------------------------------|
          |                    Basic AT Commands                    |
          |---------------------------------------------------------|
          | AT, ‘+++’, A/                                           |
          |---------------------------------------------------------|
          | A, B, E, H, L, M, P, S, T, V                            |
          |---------------------------------------------------------|
          | &G, &T                                                  |
          |---------------------------------------------------------|
          |                       S Registers                       |
          |---------------------------------------------------------|
          | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12   |
          |---------------------------------------------------------|
          | Note: See MHI Help file for full command documentation. |
          +---------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                           ABORT                            |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | Any key                                     |
          |--------------+---------------------------------------------|
          | Description: | Aborts answering/originating a call; modem  |
          |              | hangs up.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S13                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S13=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-159                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls DTR reset, non-error-correcting    |
          |              | mode buffer, BS/DEL switch, DTR dialing,    |
          |              | reset dialing, and reaction to escape       |
          |              | character.                                  |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | DTR normal                                  |
          |      |       |                                             |
          |      |     1 | Reset on low DTR                            |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Non-error-correcting mode transmit buffer   |
          |      |       | set to 1.5KB                                |
          |      |     1 |                                             |
          |      |       | Non-error-correcting mode transmit buffer   |
          |      |       | set to 128 bytes                            |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Use backspace key for delete disabled       |
          |      |       |                                             |
          |      |     1 | Use backspace key for delete enabled        |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | DTR dialing disabled                        |
          |      |       |                                             |
          |      |     1 | DTR dialing enabled                         |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Reset dialing disabled                      |
          |      |       |                                             |
          |      |     1 | Reset dialing enabled                       |
          |------+-------+---------------------------------------------|
          | 6, 5 |  í 00 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Normal operations                           |
          |      |       |                                             |
          |      |     1 | Disconnect on escape character              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S15                   |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] S15=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | 0                                         |
          |----------------+-------------------------------------------|
          | Range:         | 0-255                                     |
          |----------------+-------------------------------------------|
          | Description:   | Controls ARQ/MNP in V.22, V.22bis,        |
          |                | V.32/32bis/32terbo; MNP handshake, MNP3,  |
          |                | MNP4, MNP incompatibility, and V.32       |
          |                | operation.                                |
          |------------------------------------------------------------|
          |   Bit   | Value |                 Function                 |
          |---------+-------+------------------------------------------|
          |    0    |   í 0 | ARQ/MNP for V.22 enabled                 |
          |         |       |                                          |
          |         |     1 | ARQ/MNP for V.22 disabled                |
          |------------------------------------------------------------|
          |      1      |  í | ARQ/MNP for V.22bis enabled             |
          |             |  0 |                                         |
          |             |    | ARQ/MNP for V.22bis disabled            |
          |             |  1 |                                         |
          |-------------+----+-----------------------------------------|
          |      2      |  í | ARQ/MNP for V.32/32bis/32terbo enabled  |
          |             |  0 |                                         |
          |             |    | ARQ/MNP for V.32/32bis/32terbo disabled |
          |             |  1 |                                         |
          |-------------+----+-----------------------------------------|
          |      3      |  í | MNP handshake enabled                   |
          |             |  0 |                                         |
          |             |    | MNP handshake disabled                  |
          |             |  1 |                                         |
          |-------------+----+-----------------------------------------|
          |      4      |  í | MNP4 enabled                            |
          |             |  0 |                                         |
          |             |    | MNP4 disabled                           |
          |             |  1 |                                         |
          |-------------+----+-----------------------------------------|
          |      5      |  í | MNP3 enabled                            |
          |             |  0 |                                         |
          |             |    | MNP3 disabled                           |
          |             |  1 |                                         |
          |-------------+----+-----------------------------------------|
          |      6      |  í | MNP compatibility                       |
          |             |  0 |                                         |
          |             |    | MNP incompatibility                     |
          |             |  1 |                                         |
          |-------------+----+-----------------------------------------|
          |      7      |  í | V.32 operation enabled                  |
          |             |  0 |                                         |
          |             |    | V.32 operation disabled                 |
          |             |  1 |                                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S26                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S26=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-191                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls V.21, V.32 encoding and            |
          |              | modulation, V.23 fallback, V.32bis mode,    |
          |              | and 9600 result codes.                      |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | V.21 disabled                               |
          |      |       |                                             |
          |      |     1 | V.21 enabled                                |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | V.32 non-trellis coding disabled            |
          |      |       |                                             |
          |      |     1 | V.32 non-trellis coding enabled             |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | V.32 modulation enabled                     |
          |      |       |                                             |
          |      |     1 | V.32 modulation disabled                    |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | 2100Hz answer tone enabled                  |
          |      |       |                                             |
          |      |     1 | 2100Hz answer tone disabled                 |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | V.23 fallback mode disabled                 |
          |      |       |                                             |
          |      |     1 | V.23 fallback mode enabled                  |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | V.32bis mode enabled                        |
          |      |       |                                             |
          |      |     1 | V.32bis mode disabled                       |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Actual result codes displayed               |
          |      |       |                                             |
          |      |     1 | Force 9600 result codes                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        BREAK LENGTH                        |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S21=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 10                                          |
          |--------------+---------------------------------------------|
          | Range:       | Unidentified                                |
          |--------------+---------------------------------------------|
          | Unit:        | .01 second                                  |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of error control mode       |
          |              | breaks sent from DCE to DTE.                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK TYPE                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Yn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Configures action of break signal           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &Y0      | Empty buffer only                           |
          |--------------+---------------------------------------------|
          |    í &Y1     | Empties buffer and break is sent            |
          |              | immediately                                 |
          |--------------+---------------------------------------------|
          |     &Y2      | Do not empty buffer and break is sent       |
          |              | immediately                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CARRIER DETECT (CD)                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the CD signal                      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &C0      | Modem does not respond to CD signal         |
          |--------------+---------------------------------------------|
          |    í &C1     | CD signal normal                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Kn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &K0      | Data compression disabled                   |
          |--------------+---------------------------------------------|
          |    í &K1     | Auto enabled/disable data compression       |
          |--------------+---------------------------------------------|
          |     &K2      | Data compression enabled                    |
          |--------------+---------------------------------------------|
          |     &K3      | MNP5 data compression disabled              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CONNECTION SPEED UPPER LIMIT                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets maximum required connection speed,     |
          |              | modem will hang up if it cannot connect.    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &N0     | Variable                                    |
          |--------------+---------------------------------------------|
          |     &N1      | 300bps                                      |
          |--------------+---------------------------------------------|
          |     &N2      | 1200bps                                     |
          |--------------+---------------------------------------------|
          |     &N3      | 2400bps                                     |
          |--------------+---------------------------------------------|
          |     &N4      | 4800bps                                     |
          |--------------+---------------------------------------------|
          |     &N5      | 7200bps                                     |
          |--------------+---------------------------------------------|
          |     &N6      | 9600bps                                     |
          |--------------+---------------------------------------------|
          |     &N7      | 12Kbps                                      |
          |--------------+---------------------------------------------|
          |     &N8      | 14.4Kbps                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DATA SET READY (DSR)                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Sn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects DSR options                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &S0     | DSR forced high                             |
          |--------------+---------------------------------------------|
          |     &S1      | DSR controlled by modem                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DATA TERMINAL READY (DTR)                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Dn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects modem response to DTR               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &D0      | Modem does not respond to DTR               |
          |--------------+---------------------------------------------|
          |     &D1      | Modem goes to command mode after DTR        |
          |              | toggles                                     |
          |--------------+---------------------------------------------|
          |    í &D2     | Modem uses DTR as normal                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                            DIAL                            |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] D<#> [cmds]                       |
          |--------------+---------------------------------------------|
          | Example:     | ATDT 443-3388,,,1111;                       |
          |--------------+---------------------------------------------|
          | Description: | Dials telephone number according to any     |
          |              | modifiers included in the string            |
          |--------------+---------------------------------------------|
          | Note:        | Any combination of modifiers can be used to |
          |              | produce the desired dial functions in       |
          |              | sequence.                                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     í P      | Pulse dialing enabled                       |
          |--------------+---------------------------------------------|
          |      T       | Tone dialing enabled                        |
          |--------------+---------------------------------------------|
          |      ,       | Dialing paused for 2 seconds or amount      |
          |              | specified in S8 register                    |
          |--------------+---------------------------------------------|
          |      ;       | Modem returned to command state after       |
          |              | dialing. Can only be placed at the end of   |
          |              | the dial command.                           |
          |--------------+---------------------------------------------|
          |      !       | Flash function initiated                    |
          |--------------+---------------------------------------------|
          |      /       | Pause for 125ms then proceed with dial      |
          |              | string                                      |
          |--------------+---------------------------------------------|
          |      @       | Dial, wait for quiet answer, then continue  |
          |              | to execute the rest of the dial string      |
          |--------------+---------------------------------------------|
          |      W       | Dial, wait for second dial tone for amount  |
          |              | specified in S6 register, then continue to  |
          |              | execute the rest of the dial string         |
          |--------------+---------------------------------------------|
          |      R       | Answer mode enabled, originate mode         |
          |              | disabled following handshake initiation     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAL - LAST NUMBER                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] DL [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Re-dial last number dialed                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DIAL - STORED NUMBER                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] DSn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Dial stored number from memory location n   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  DISCONNECT BUFFER DELAY                   |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S38=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | Unidentified                                |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets maximum duration allowed during        |
          |              | buffered data calls for modem to perform    |
          |              | clearing functions after losing             |
          |              | carrier-signal or receiving a clear call    |
          |              | signal from the remote modem and before     |
          |              | initiating hang-up process. A value of 0    |
          |              | will allow the modem to hanging-up after    |
          |              | DTR drops.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DTR CHANGE THRESHOLD                    |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S25=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 20                                          |
          |--------------+---------------------------------------------|
          | Range:       | Unidentified                                |
          |--------------+---------------------------------------------|
          | Unit:        | .01 second                                  |
          |--------------+---------------------------------------------|
          | Description: | Sets maximum time a change in the DTR       |
          |              | signal will be ignored                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                ERROR CORRECTION MODE (ARQ)                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects active error correction protocols   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &M0      | Normal mode only                            |
          |--------------+---------------------------------------------|
          |    í &M4     | Auto-detect mode                            |
          |--------------+---------------------------------------------|
          |     &M5      | ARQ mode only                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   EXTENDED RESULT CODES                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &An [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects extended result codes               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &A0      | Extended result codes disabled              |
          |--------------+---------------------------------------------|
          |     &A1      | ARQ result codes enabled                    |
          |--------------+---------------------------------------------|
          |     &A2      | ARQ result codes enabled and V.32 result    |
          |              | code added                                  |
          |--------------+---------------------------------------------|
          |    í &A3     | Error control and compression result codes  |
          |              | enabled                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  FACTORY DEFAULT PROFILE                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Fn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Resets values in active profile to values   |
          |              | found in the default profile, which are     |
          |              | READ-ONLY.                                  |
          |------------------------------------------------------------|
          |      Command       |               Function                |
          |--------------------+---------------------------------------|
          |        &F0         | Generic template                      |
          |--------------------+---------------------------------------|
          |       í &F1        | Hardware flow control template        |
          |--------------------+---------------------------------------|
          |        &F2         | Software flow control template        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               FLOW CONTROL CHARACTER - XOFF                |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S23=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 19                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character used to represent XOFF.  |
          +------------------------------------------------------------+
       
                                      . . . continued from previous page
       
          +------------------------------------------------------------+
          |                FLOW CONTROL CHARACTER - XON                |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S22=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 17                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | ASCII                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the character used to represent XON.   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 FLOW CONTROL PASS-THROUGH                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &In [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Allows modem to act on, then transmit       |
          |              | XON/XOFF characters.                        |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &I0     | Software flow control disabled              |
          |--------------+---------------------------------------------|
          |     &I1      | XON/XOFF passthrough enabled                |
          |--------------+---------------------------------------------|
          |     &I2      | XON/XOFF passthrough disabled               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FLOW CONTROL TYPE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Hn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets type of flow control used by modem     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &H0      | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |    í &H1     | CTS/RTS flow control enabled                |
          |--------------+---------------------------------------------|
          |     &H2      | XON/XOFF flow control enabled               |
          |--------------+---------------------------------------------|
          |     &H3      | CTS/RTS and XON/XOFF flow control enabled   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FLOW CONTROL TYPE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls receive data hardware flow control |
          |              | and RTS signals                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &R1      | Modem ignores RTS                           |
          |--------------+---------------------------------------------|
          |    í &R2     | Received data to DTE when RTS is on         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      HANDSHAKE TIMER                       |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S28=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 8                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of handshake time, so       |
          |              | modems with V.32bis are given a chance to   |
          |              | connect at 9600bps or higher.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S19=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | Unidentified                                |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem does |
          |              | not receive information before it           |
          |              | disconnects.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  LIST AMPERSAND COMMANDS                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &$ [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays ampersand (&) commands             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     LIST DIAL COMMANDS                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] D$ [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays dial commands                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      LIST S-REGISTERS                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S$ [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays the S-registers                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      LOCK SERIAL PORT                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets operation of serial port speed         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &B0      | Serial speed follows connect speed          |
          |--------------+---------------------------------------------|
          |    í &B1     | Serial speed locked                         |
          |--------------+---------------------------------------------|
          |     &B2      | Serial speed locked in ARQ mode only        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          ON-LINE                           |
          |------------------------------------------------------------|
          | Type:         | Immediate                                  |
          |---------------+--------------------------------------------|
          | Format:       | AT [cmds] On [cmds]                        |
          |---------------+--------------------------------------------|
          | Description:  | Controls on-line command (data             |
          |               | transmission) mode options.                |
          |------------------------------------------------------------|
          |      Note: The O command must be placed at the end of the  |
          |      command string.                                       |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |      O0       | On-line command mode with no retraining    |
          |               | enabled                                    |
          |---------------+--------------------------------------------|
          |      O1       | On-line command mode with retraining       |
          |               | enabled                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        ON-LINE HELP                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $ [cmds]                          |
          |--------------+---------------------------------------------|
          | Description: | On-line help; displays basic command list   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             POWER-UP/HARD RESET CONFIGURATIONS             |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Yn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | On power-up modem uses default profiles     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     í Y0     | Use default setting 0 saved in non-volatile |
          |              | RAM                                         |
          |--------------+---------------------------------------------|
          |      Y1      | Use default setting 1 saved in non-volatile |
          |              | RAM                                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    PULSE DIALING RATIO                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Pn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects pulse dial make/break ratio         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &P0     | 39/61ms at 10pps (North America)            |
          |--------------+---------------------------------------------|
          |     &P1      | 33/67ms at 10pps (Europe)                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     REPORT INFORMATION                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] In [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays information requested              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      I0      | Reports 4-digit product code                |
          |--------------+---------------------------------------------|
          |      I1      | Reports ROM checksum                        |
          |--------------+---------------------------------------------|
          |      I2      | Reports RAM checksum                        |
          |--------------+---------------------------------------------|
          |      I3      | Reports product type                        |
          |--------------+---------------------------------------------|
          |      I4      | Reports current command settings            |
          |--------------+---------------------------------------------|
          |      I5      | Reports NVRAM settings                      |
          |--------------+---------------------------------------------|
          |      I6      | Reports link diagnostics                    |
          |--------------+---------------------------------------------|
          |      I7      | Reports product configuration               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RESULT CODES                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Qn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Enables modem to send result codes to the   |
          |              | DTE                                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     í Q0     | Result code sending enabled                 |
          |--------------+---------------------------------------------|
          |      Q1      | Result code sending disabled                |
          |--------------+---------------------------------------------|
          |      Q2      | Result code sending enabled while in        |
          |              | originate mode                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             SELECT CALL PROGRESS RESULT CODES              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Xn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Enables selection of tone detection and     |
          |              | associated result code format options       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      X0      | Busy and dial tone detection disabled;      |
          |              | result codes 0-4 enabled.                   |
          |--------------+---------------------------------------------|
          |      X1      | Busy and dial tone detection disabled;      |
          |              | result codes 0-5, 10-107 enabled            |
          |--------------+---------------------------------------------|
          |      X2      | Busy tone detection disabled, dial tone     |
          |              | detection enabled; result codes 0-6, 10-107 |
          |              | enabled; also adaptive dialing, wait for    |
          |              | second dial tone, and fast dialing enabled. |
          |--------------+---------------------------------------------|
          |      X3      | Busy tone detection enabled, dial tone      |
          |              | detection disabled; result codes 0-5, 7-107 |
          |              | enabled; also adaptive dialing, and wait    |
          |              | for answer enabled.                         |
          |--------------+---------------------------------------------|
          |     í X4     | Busy and dial tone detection enabled;       |
          |              | result codes 0-1, 3-25 enabled; also        |
          |              | adaptive dialing, wait for second dial      |
          |              | tone, wait for answer, and fast dialing     |
          |              | enabled.                                    |
          |------------------------------------------------------------|
          | Note: Valid numeric result codes; 0-8, 10, 13, 18, 20, 21, |
          | 25, 43, 85, 91, 99, 103, and 107.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         SOFT RESET                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Zn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Restores modem profiles previously saved in |
          |              | non-volatile RAM                            |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     í Z0     | Restore setting used by ATY command         |
          |--------------+---------------------------------------------|
          |      Z1      | Restore setting 0                           |
          |--------------+---------------------------------------------|
          |      Z2      | Restore setting 1                           |
          |--------------+---------------------------------------------|
          |      Z3      | Restore factory setting 0 (AT&F0)           |
          |--------------+---------------------------------------------|
          |      Z4      | Restore factory setting 1 (AT&F1)           |
          |--------------+---------------------------------------------|
          |      Z5      | Restore factory setting 2 (AT&F2)           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      STATUS-REGISTER                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | Read: AT [cmds] Sn? [cmds]                  |
          |              |                                             |
          |              | Write: AT [cmds] Sn=x [cmds]                |
          |--------------+---------------------------------------------|
          | Description: | Writes to or reads from a specified         |
          |              | register                                    |
          |------------------------------------------------------------|
          |      Note: See the section on S-registers for detailed     |
          |      listing of commonly used S-registers.                 |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |    Sn.b=x     | Write to register bit b using values 0     |
          |               | (off) and 1 (on) for x                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    STORE ACTIVE PROFILE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Wn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Writes the values for the active profile    |
          |              | into the non-volatile RAM templates         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &W0      | Write the active profile to stored profile  |
          |              | 0                                           |
          |--------------+---------------------------------------------|
          |     &W1      | Write the active profile to stored profile  |
          |              | 1                                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   STORE TELEPHONE NUMBER                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Zn=x [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Writes selected telephone numbers into the  |
          |              | non-volatile memory at location n           |
          |------------------------------------------------------------|
          |      Note: The characters described in the D command are   |
          |      valid for use in the &Z command.                      |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |     &Zn=L     | Writes last executed dial string into the  |
          |               | non-volatile memory at location n          |
          |---------------+--------------------------------------------|
          |     &Zn?      | Displays phone number from non-volatile    |
          |               | memory at location n                       |
          |---------------+--------------------------------------------|
          |     &ZL?      | Displays last executed dial string         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST MODES                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Tn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls loopback tests, analog, digital,   |
          |              | remote digital, and self tests.             |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |      &T0      | Testing disabled                           |
          |---------------+--------------------------------------------|
          |      &T1      | Local analog loopback enabled              |
          |---------------+--------------------------------------------|
          |      &T3      | Local digital loopback enabled             |
          |---------------+--------------------------------------------|
          |      &T4      | Remote digital loopback enabled            |
          |---------------+--------------------------------------------|
          |     í &T5     | Remote digital loopback prohibited         |
          |---------------+--------------------------------------------|
          |      &T6      | Remote digital loopback initiated          |
          |---------------+--------------------------------------------|
          |      &T7      | Remote digital loopback w/ self-test and   |
          |               | error detector in progress                 |
          |---------------+--------------------------------------------|
          |      &T8      | Local analog loopback w/ self-test and     |
          |               | error detector in progress                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST TIMER                         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S18=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | Unidentified                                |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum duration for modem tests   |
          |------------------------------------------------------------|
          |      Note: S18=0 disables the timer and allows an          |
          |      indefinite duration.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     TONE DIALING TEST                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S16=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects the tone dialing test               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í S16=0    | Tone dialing test disabled                  |
          |--------------+---------------------------------------------|
          |    S16=2     | Tone dialing test enabled                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             V.21 - ANSWER MODE FALLBACK TIMER              |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S29=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 20                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Set the amount of time the modem uses       |
          |              | during V.21 answer mode fallback            |
          +------------------------------------------------------------+