
PRACTICAL PERIPHERALS, INC.

PC144HC

Modem Type                   Data (synchronous/asynchronous)/Fax
Maximum Data Rate            14.4Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     8-bit ISA
Fax Class                    Class I & II
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.21, V.22, V.22bis, V.23, V.32,
                             V.32bis
Fax Modulation Protocol      ITU-T V.17, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis

[Image]

                                CONNECTIONS

         Purpose           Location            Purpose           Location

  Line out                    CN1       Line in                    CN2

          BASE I/O ADDRESS SELECTION

    Address          SW1/1          SW1/2

  COM1: (3F8h)        On              On

  COM2: (2F8h)        On             Off

  COM3: (3E8h)        Off             On

  COM4: (2E8h)        Off            Off

                          INTERRUPT SELECTION

  IRQ              JP1 pins 1 & 2    JP1 pins 3 & 4    JP1 pins 5 & 6

   3/4                Closed             Open              Open

  2                     Open             Closed             Open

  5                     Open              Open             Closed

                         Proprietary AT Command Set

                               EXTENDED RING

  Format:             AT [cmds] S101=n [cmds]

  Example:            ATS101=40<CR>

  Default:            0

  Range:              0 - 255

  Unit:               Bit-mapped

  Description:        Selects the response to extended ring types.

     Bit        Value                       Function

      0         0      Do not respond to ring type A.

               1        Respond to ring type A.

      1         0      Do not respond to ring type B.

               1        Respond to ring type B.

      2         0      Do not respond to ring type C.

               1        Respond to ring type C.

      3         0      Do not respond to ring type D.

               1        Respond to ring type D.

      4         0      Do not respond to ring type E.

               1        Respond to ring type E.

      5         0      Do not respond to ring type F.

               1        Respond to ring type F.

      6         0      Do not respond to ring type G.

               1        Respond to ring type G.

      7         0      Report RING for all ring types.

               1        Report RING n where n is the ring type.

                               HELP SCREENS

  Type:          Immediate

  Format:        AT [cmds] $H

  Example:       AT $H<CR>

  Description:   Shows modem help screens.

                             LAP-M PACKET SIZE

  Type:          Immediate

  Format:        AT [cmds] S136=n [cmds]

  Example:       AT S136=2 %C1<CR>

  Description:   Sets the frame size for an LAP-M connection.

  Command                                Function

  S136=0         Select 128 byte frame size.

   S136=1       Select 256 byte frame size.

  S136=2         Select 512 byte frame size.

                                  REDIAL

  Type:          Immediate

  Format:        AT [cmds] DL

  Example:       AT M1 DL<CR>

  Description:   Redials the last number dialed.

                          V.22 PROBE REJECT TIME

  Type:             Register

  Format:           AT [cmds] S97=n [cmds]

  Example:          ATS97=15<CR>

  Default:          30

  Range:            15-70

  Unit:             .1 second

  Description:      Sets the time for which the modem will reject the
                    V.22/V.22bis probe signal when in V.32 mode.

