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

  COM2 (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               0   Not used

     1                0  Command echo disabled

                     1   Command echo enabled

     2                0  Result codes enabled

                     1   Result codes disabled

     3                0  Display result codes in numeric format

                     1   Display result codes in verbose format

     4               0   Not used

     5                0  33/67ms at 10pps (Europe)

                     1   39/61ms at 10pps (North America)

     6                0  ITU/T mode

                     1   Bell mode

     7                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

    Command                              Function

  » S16=0         Normal mode

     S16=1        Local analog loopback in progress

     S16=2        DTMF tone test in progress

     S16=4        Digital loopback in progress