PRACTICAL PERIPHERALS, INC.
===========================

   PM1200

   Card Type                Modem (asynchronous)                  
   Chip Set                 Unidentified                          
   Maximum Data Rate        1200bps                               
   Data Bus                 8-bit ISA                             
   Data Modulation Protocol Bell 103/212A                         
                                                                  
                            ITU-T V.22                            

                                                            V2038

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                 Setting                 | Label | Position |
   |-----------------------------------------+-------+----------|
   | DTR is ignored                          | SW1/E |    On    |
   |-----------------------------------------+-------+----------|
   | DTR normal                              | SW1/E |   Off    |
   |-----------------------------------------+-------+----------|
   | DCD forced high                         | SW1/F |    On    |
   |-----------------------------------------+-------+----------|
   | DCD normal                              | SW1/F |   Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    SERIAL PORT ADDRESS                     |
   |------------------------------------------------------------|
   |   Setting    |  IRQ  |  SW1/A  |  SW1/B  | SW1/C  | SW1/D  |
   |--------------+-------+---------+---------+--------+--------|
   | COM1 (3F8h)  |   4   |   On    |   On    |   On   |  Off   |
   |--------------+-------+---------+---------+--------+--------|
   | iCOM2 (2F8h) |   3   |   Off   |   On    |  Off   |   On   |
   |--------------+-------+---------+---------+--------+--------|
   | COM3 (3E8h)  |   4   |   On    |   Off   |   On   |  Off   |
   |--------------+-------+---------+---------+--------+--------|
   | COM4 (2E8h)  |   3   |   Off   |   Off   |  Off   |   On   |
   +------------------------------------------------------------+

   +-------------------------------+
   | MISCELLANEOUS TECHNICAL NOTES |
   |-------------------------------|
   |      Diagram not available    |
   +-------------------------------+

                     Proprietary AT Command Set

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S13                   |
   |------------------------------------------------------------|
   | Format:      | AT [cmds] S13=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Default:     | Unidentified                                |
   |--------------+---------------------------------------------|
   | Range:       | 0-220                                       |
   |--------------+---------------------------------------------|
   | Unit:        | Bit-mapped                                  |
   |--------------+---------------------------------------------|
   | Description: | Controls parity, data bits, and buffer      |
   |              | overflow flag.                              |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   | 1, 0 |    00 | Not used                                    |
   |------+-------+---------------------------------------------|
   |  2   |     0 | Parity disabled                             |
   |      |       |                                             |
   |      |     1 | Parity enabled                              |
   |------+-------+---------------------------------------------|
   |  3   |     0 | Odd parity                                  |
   |      |       |                                             |
   |      |     1 | Even parity                                 |
   |------+-------+---------------------------------------------|
   |  4   |     0 | 7 data bits                                 |
   |      |       |                                             |
   |      |     1 | 8 data bits                                 |
   |------+-------+---------------------------------------------|
   |  5   |     0 | Not used                                    |
   |------+-------+---------------------------------------------|
   |  6   |     0 | Buffer overflow flag disabled               |
   |      |       |                                             |
   |      |     1 | Buffer overflow flag enabled                |
   |------+-------+---------------------------------------------|
   |  7   |     0 | Space parity                                |
   |      |       |                                             |
   |      |     1 | Mark parity                                 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S14                   |
   |------------------------------------------------------------|
   | Format:      | AT [cmds] S14=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Default:     | Unidentified                                |
   |--------------+---------------------------------------------|
   | Range:       | 0-174                                       |
   |--------------+---------------------------------------------|
   | Unit:        | Bit-mapped                                  |
   |--------------+---------------------------------------------|
   | Description: | Controls echo, result codes and display,    |
   |              | pulse dial make/break ratio, ITU-T/Bell     |
   |              | modes, and the long space disconnect        |
   |              | function.                                   |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   |  0   |   i 0 | Not used                                    |
   |------+-------+---------------------------------------------|
   |  1   |     0 | Command echo disabled                       |
   |      |       |                                             |
   |      |   i 1 | Command echo enabled                        |
   |------+-------+---------------------------------------------|
   |  2   |   i 0 | Result codes enabled                        |
   |      |       |                                             |
   |      |     1 | Result codes disabled                       |
   |------+-------+---------------------------------------------|
   |  3   |     0 | Display result codes in numeric format      |
   |      |       |                                             |
   |      |   i 1 | Display result codes in verbose format      |
   |------+-------+---------------------------------------------|
   |  4   |   i 0 | Not used                                    |
   |------+-------+---------------------------------------------|
   |  5   |     0 | 33/67ms at 10pps (Europe)                   |
   |      |       |                                             |
   |      |   i 1 | 39/61ms at 10pps (North America)            |
   |------+-------+---------------------------------------------|
   |  6   |     0 | ITU/T mode                                  |
   |      |       |                                             |
   |      |     1 | Bell mode                                   |
   |------+-------+---------------------------------------------|
   |  7   |   i 0 | Long space disconnect function disabled     |
   |      |       |                                             |
   |      |     1 | Long space disconnect function enabled      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S15                   |
   |------------------------------------------------------------|
   | Format:      | AT [cmds] S15=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Default:     | Unidentified                                |
   |--------------+---------------------------------------------|
   | Range:       | 0-127                                       |
   |--------------+---------------------------------------------|
   | Unit:        | Bit-mapped                                  |
   |--------------+---------------------------------------------|
   | Description: | Controls baud rate, answer/originate mode,  |
   |              | and carrier signal.                         |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   | 1, 0 |    00 | Unidentified                                |
   |      |       |                                             |
   |      |    01 | 110bps                                      |
   |      |       |                                             |
   |      |    10 | 300bps                                      |
   |      |       |                                             |
   |      |    11 | 1200bps                                     |
   |------+-------+---------------------------------------------|
   |  2   |     0 | Answer mode enabled                         |
   |      |       |                                             |
   |      |     1 | Answer mode disabled                        |
   |------+-------+---------------------------------------------|
   |  3   |     0 | Originate mode disabled                     |
   |      |       |                                             |
   |      |     1 | Originate mode enabled                      |
   |------+-------+---------------------------------------------|
   | 5, 4 |    00 | Unidentified                                |
   |      |       |                                             |
   |      |    01 | 110bps                                      |
   |      |       |                                             |
   |      |    10 | 300bps                                      |
   |      |       |                                             |
   |      |    11 | 1200bps                                     |
   |------+-------+---------------------------------------------|
   |  6   |     0 | Carrier signal disabled                     |
   |      |       |                                             |
   |      |     1 | Carrier signal enabled                      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                            DIAL                            |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] D<#> [cmds]                       |
   |--------------+---------------------------------------------|
   | 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.                                   |
   |--------------+---------------------------------------------|
   |   Modifier   |                  Function                   |
   |--------------+---------------------------------------------|
   |      P       | Pulse dialing enabled                       |
   |--------------+---------------------------------------------|
   |      R       | Answer mode enabled, originate mode         |
   |              | disabled following handshake initiation     |
   |--------------+---------------------------------------------|
   |      T       | Tone dialing enabled                        |
   |--------------+---------------------------------------------|
   |      ,       | Dialing paused for amount of time specified |
   |              | in S8 register                              |
   |--------------+---------------------------------------------|
   |      /       | Dialing paused for 125 millisecond          |
   |--------------+---------------------------------------------|
   |      !       | Modem commanded to go off-hook for          |
   |              | specified time before returning on-hook     |
   |--------------+---------------------------------------------|
   |      @       | Wait for quiet answer                       |
   |--------------+---------------------------------------------|
   |      ;       | Modem returned to command state after       |
   |              | dialing                                     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     REPORT INFORMATION                     |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] In [cmds]                         |
   |--------------+---------------------------------------------|
   | Description: | Displays information requested              |
   |--------------+---------------------------------------------|
   |   Command    |                  Function                   |
   |--------------+---------------------------------------------|
   |      I0      | Reports modem model and speed               |
   |--------------+---------------------------------------------|
   |      I1      | Reports firmware revision                   |
   |--------------+---------------------------------------------|
   |      I2      | Tests and reports internal memory test      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         TEST MODES                         |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] S16=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Description: | Controls loopback tests, analog, digital,   |
   |              | and DTMF tone tests                         |
   |--------------+---------------------------------------------|
   |  i Command   |                  Function                   |
   |--------------+---------------------------------------------|
   |>> S16=0      | Normal mode                                 |
   |--------------+---------------------------------------------|
   |   i S16=1    | Local analog loopback in progress           |
   |--------------+---------------------------------------------|
   |   i S16=2    | DTMF tone test in progress                  |
   |--------------+---------------------------------------------|
   |   i S16=4    | Digital loopback in progress                |