
CALPAK CORPORATION

MX-2400

Modem Type             Data (synchronous/asynchronous)
Maximum Data Rate      2400bps
Data Bus               8-bit ISA
Data Modulation        Unidentifed
Protocol

[Image]

                                CONNECTIONS

         Purpose           Location            Purpose           Location

  Line out                    CN1       Line in                    CN2

                        BASE I/O ADDRESS SELECTION

      Port           SW1/A         SW1/C         SW1/E          SW1/F

   COM1:             Off           On            Off             On
  (3F8h)

  COM2: (2F8h)        On            Off           Off             On

  COM3: (3E8h)        Off           On             On            Off

  COM4: (2E8h)        On            Off            On            Off

                            INTERRUPT SELECTION

       IRQ              SW/B              SW1/D               JP1

  3                      On                Off         Pins 2 & 4 closed

   4                   Off                On          Pins 2 & 4 closed

  5                     Off                Off         Pins 3 & 4 closed

  7                     Off                Off         Pins 1 & 2 closed

  Note: Location of JP1 is unidentified.

                         Proprietary AT Command Set

                          BIT-MAPPED REGISTER S14

  Format                    AT [cmds] S14=n [cmds]

  Example:                  ATS14=0<CR>

  Default:                  Unidentified

  Range:                    0-174

  Unit:                     Bit-mapped

  Description:              Controls echo, result codes, result code
                            display, dial mode, smart/dumb mode and
                            answer/originate mode.

       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      Smart mode.

                       1       Dumb mode.

        5               0      Tone dial enabled.

                       1       Pulse dial enabled.

        6              0       Not used.

        7               0      Answer mode enabled.

                       1       Originate mode enabled.

                          BIT-MAPPED REGISTER S21

  Format                     AT [cmds] S21=n [cmds]

  Example:                   ATS21=0<CR>

  Default:                   Unidentified

  Range:                     0-253

  Unit:                      Bit-mapped

  Description:               Selects jack type, CTS signal, low DTR
                             action, DCD signal, DSR signal, and the Long
                             Space Disconnect function.

        Bit         Value                       Function

         0              0       Selects RJ-11 jack.

                        1       Not used.

         1              0       Serial

                        1       Paralell

         2              0       CTS follows RTS.

                        1       CTS forced high (synchronous only).

       4, 3             00      DTR signal ignored.

                        01      Modem goes to command mode on low DTR.

                        10      Modem disconnects on low DTR. Auto-Answer
                                is disabled.
                       11
                                Modem is initialized on low DTR.

         5              0       DCD forced high.

                        1       DCD normal.

         6              0       DSR forced high.

                        1       DSR normal.

         7              0       Long Space Disconnect function disabled.

                        1       Long Space Disconnect function enabled.

                          BIT-MAPPED REGISTER S22

  Format                    AT [cmds] S22=n [cmds]

  Example:                  ATS22=0<CR>

  Default:                  Unidentified

  Range:                    0-127

  Unit:                     Bit-mapped

  Description:              Controls speaker volume and controls, and
                            limits results codes.

       Bit          Value                       Function

       1, 0            00       Off volume.

                       01       On volume.

                       10       Medium level volume.

                       11       High level volume.

       3, 2            00       Speaker off.

                       01       Speaker off on carrier.

                       10       Speaker always on.

                       11       Speaker on during handshake.

     6, 5, 4           000      Basic result codes only enabled.

                       100      Basic and connection speed result codes
                                enabled.
                       101
                                Basic and connection speed result codes
                       110      and dialtone detection enabled.

                      111       All result codes except dialtone
                                detection enabled.

                                All result codes enabled.

                          BIT-MAPPED REGISTER S23

  Format                   AT [cmds] S23=n [cmds]

  Example:                 ATS23=0<CR>

  Default:                 Unidentified

  Range:                   0-189

  Unit:                    Bit-mapped

  Description:             Grants/denies remote digital loopback,
                           controls DTE rate and parity, and sets guard
                           tone.

        Bit           Value                     Function

         0              0       Remote digital loopback denied.

                        1       Remote digital loopback allowed.

      3, 2, 1       00          Sets serial port speed to 0-300bps.

                    01          Sets serial port speed to 600bps.

                    10          Sets serial port speed to 1200bps.

                    11          Sets serial port speed to 2400bps..

        5,4             00      Parity even.

                        01      Space Parity.

                        10      Parity odd.

                       11       Mark/No Parity.

       7, 6             00      Guard tone disabled.

                        01      Guard tone 550Hz enabled.

                       10       Guard tone 1800Hz enabled.

                          BIT-MAPPED REGISTER S27

  Format                   AT [cmds] S27=n [cmds]

  Example:                 AT S27=0 <CR>

  Default:                 Unidentified

  Range:                   0 - 108

  Unit:                    Bit-mapped

  Description:             Selects sync/async mode, Line type, internal
                           clock, and ITU-T/Bell modes.

       Bit           Value                      Function

     3, 1, 0          000      Asynchronous mode, serial port speed
                               follows connect speed.
                      001
                               Asynchronous command mode and synchronous
                      010      connect mode.

                      011      Asynchronous command mode and synchronous
                               connect mode, DTR dialing enabled.
                      100
                               Asynchronous command mode on low DTR,
                               synchronous connect mode on high DTR.

                               Hayes AutoSync&trade; mode - serial port
                               locked at 9600bps.

        2              0       Dial up line.

                       1       Leased line.

       5, 4            00      Internal DCE transmit clock source.

                       01      External DTE transmit clock source.

                      10       Remote DCE transmit clock source.

        6              0       CCITT mode.

                       1       Bell mode.

                                TEST MODES

  Format                  AT [cmds] S16=n [cmds]

  Example:                ATS16=0<CR>

  Default:                Unidentified

  Range:                  0-125

  Unit:                   Bit-mapped

  Description:            Controls loopback tests, analog, digital,
                          remote digital, and self tests.

      Bit         Value                        Function

       0             0       Local analog loopback not in progress.

                    1        Local analog loopback in progress.

       1            0        Not used.

       2             0       Local digital loopback not in progress.

                    1        Local digital loopback in progress.

       3             0       Modem not in remote digital loopback.

                    1        Remote digital loopback in progress.

       4             0       Remote digital loopback not requested.

                    1        Remote digital loopback requested.

       5             0       Remote digital loopback w/ self-test not in
                             progress.
                    1
                             Remote digital loopback w/ self-test in
                             progress.

       6             0       Local analog loopback w/ self-test not in
                             progress.
                    1
                             Local analog loopback w/ self-test in
                             progress.

