
MULTITECH SYSTEMS, INC.

MT1932ZPX

Modem Type                   Data (synchronous/asynchronous)/Fax
Maximum Data Rate            19.2Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     16-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

                             AT&T V.32terbo
Fax Modulation Protocol      ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP2-5, V.42, V.42bis

[Image]

      CONNECTIONS

  Purpose    Location

  Line in       CN1

                                      INTERRUPT SELECTION

  IRQ   JP1/A   JP1/B    JP1/C    JP1/D    JP1/E    JP1/F    JP1/G    JP1/H    JP1/I   JP1/J

  3     Closed   Open     Open     Open     Open    Open     Open     Open     Open     Open

  4     Open    Closed    Open     Open     Open    Open     Open     Open     Open     Open

  5     Open     Open    Closed    Open     Open    Open     Open     Open     Open     Open

  7     Open     Open     Open    Closed    Open    Open     Open     Open     Open     Open

   2    Open     Open     Open     Open    Closed   Open     Open     Open     Open     Open
  or
  9

  10    Open     Open     Open     Open     Open    Closed   Open     Open     Open     Open

  11    Open     Open     Open     Open     Open    Open     Closed   Open     Open     Open

  12    Open     Open     Open     Open     Open    Open     Open     Closed   Open     Open

  14    Open     Open     Open     Open     Open    Open     Open     Open     Closed   Open

  16    Open     Open     Open     Open     Open    Open     Open     Open     Open    Closed

                        BASE I/O ADDRESS SELECTION

  Address     SW1/1    SW1/2    SW1/3    SW1/4   SW1/5    SW1/6    SW1/7

    100h       On       On       On       On       On      Off       On

    108h       Off      On       On       On       On      Off       On

    110h       On       Off      On       On       On      Off       On

    118h       Off      Off      On       On       On      Off       On

    120h       On       On       Off      On       On      Off       On

    2E8h       Off      On       Off      Off     Off       On      Off
  (COM4:)

    2F8h       Off      Off      Off      Off     Off       On      Off
  (COM2:)

    3D8h       Off      Off      On       Off     Off      Off      Off

    3E0h       On       On       Off      Off     Off      Off      Off

    3E8h       Off      On       Off      Off     Off      Off      Off
  (COM3:)

    3F0h       On       Off      Off      Off     Off      Off      Off

    3F8h       Off      Off      Off      Off     Off      Off      Off
  (COM1:)

       Note: A total of 127 memory base I/O address settings are
       available. The switches are a binary representation of the
       hexadecimal addresses. Switch SW1/1 is the Least Significant Bit
       and switch SW1/7 is the Most Significant Bit. The switches have
       the following decimal values: switch SW1/1=8, SW1/2=16, SW1/3=32,
       SW1/4=64, SW1/5=128, SW1/6=256, SW1/7=512.Turn off the switches
       and add the values of the off switches to obtain the correct base
       I/O address. (on=0, off=1)

  FACTORY CONFIGURED - DO NOT ALTER

      Switch            Position

       SW1/8               On

                          Proprietary Command Set

                  AUTO-RELIABLE TIME BUFFER CONFIGURATION

  Type:          Configuration

  Format:        AT [cmds] $An [cmds]

  Example:       AT $A1 &W<CR>

  Description:   Controls the handling of incoming data during
                 auto-reliable time period.

    Command                              Function

      $A0        Data is discarded.

      $A1        Data is buffered.

                                 BIT MODE

  Type:          Configuration

  Format:        AT [cmds] $EBn [cmds]

  Example:       AT $EB1 E1<CR>

  Description:   Selects 10- or 11-bit mode.

    Command                              Function

      $EB0       Sets 10-bit mode.

      $EB1       Sets 11-bit mode.

                               CARRIER MODE

  Type:          Configuration

  Format:        AT [cmds] &Cn [cmds]

  Example:       AT &C0 A<CR>

  Description:   Sets the function of the Carrier Detect (CD) signal.

    Command                              Function

      &C0        Forces CD high.

      &C1        CD signal follows carrier.

      &C2        Forces CD low for time in S24 when the modem
                 disconnects.

      &C4        Resets modem when CD goes low.

                            COMMAND ESCAPE TYPE

  Type:          Configuration

  Format:        AT [cmds] %En [cmds]

  Example:       AT %E3 &W<CR>

  Description:   Sets type and response of command escape sequence.

    Command                              Function

      %E0        Command escape disabled.

      %E1        TIES escape (+++AT...)

      %E2        <BREAK>AT method.

      %E3        Both TIES and BREAK methods.

      %E4        OK response to command escape disabled.

      %E5        OK response to command escape enabled.

                                COMMAND SET

  Type:          Configuration

  Format:        AT &Qn

  Example:       AT &Q1<CR>

  Description:   Selects standard Hayes or custom command sets.

    Command                              Function

      &Q0        Multi-Tech custom command set enabled.

      &Q1        Standard Hayes command set enabled.

                                COMPRESSION

  Type:          Configuration

  Format:        AT &En

  Example:       AT &E15 #L0<CR>

  Description:   Selects data compression.

    Command                              Function

      &E14       Data compression disabled.

      &E15       Data compression enabled.

                             COMPRESSION MODE

  Type:          Configuration

  Format:        AT #Ln

  Example:       AT #L2 DT555-1212<CR>

  Description:   Selects active compression protocols.

    Command                              Function

      #L0        V.42 negotiation enabled.

      #L1        MNP negotiation enabled.

      #L2        LAP-M negotiation enabled.

      #L3        LAP-M enabled, no negotiation.

                                CTS SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &RFn [cmds]

  Example:       AT &RF0<CR>

  Description:   Selects the function of the CTS signal.

    Command                              Function

      &RF0       CTS is set to RTS.

      &RF1       CTS is independent of RTS.

                         DIAL STORED PHONE NUMBER

  Type:                 Immediate

  Format:               AT [cmds] Nn1 [Nn2, Nn3...]

  Example:              ATM0 N1N3N5<CR>

  Description:          Dials stored phone number(s). If the first number
                        is busy, the modem will proceed to the next
                        number in the list.

                                DSR SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &SFn [cmds]

  Example:       AT &SF0<CR>

  Description:   Selects the function of the DSR signal.

    Command                              Function

      &SF0       DSR is set to CD.

      &SF1       DSR is independent of CD.

                                DTR TIMEOUT

  Type:          Register

  Format:        AT [cmds] S24=n [cmds]

  Example:       ATS24=40<CR>

  Default:       20

  Range:         0-255

  Unit:          50 ms

  Description:   Sets the time to drop the DTR signal to hangup.

                    ERROR CORRECTION DISABLE ON CONNECT

  Type:          Configuration

  Format:        AT [cmds] $Fn [cmds]

  Example:       AT $F1 DT555-1212<CR>

  Description:   Selects whether error correction can be disabled by a
                 <CR> while handshaking.

    Command                              Function

      $F0        Error correction handshake interrupt disabled.

      $F1        Error correction handshake interrupt enabled.

                        ESCAPE SEQUENCE BUFFER SIZE

  Type:          Register

  Format:        AT [cmds] S34=n [cmds]

  Example:       ATS34=30<CR>

  Default:       10

  Range:         0-60

  Unit:          1 byte

  Description:   Sets the size of the buffer used to store commands
                 during an escape sequence.

                       ESCAPE SEQUENCE - OUT OF BAND

  Type:          Immediate

  Format:        <BREAK> AT [cmds]<CR>

  Example:       <BREAK> AT #F1<CR>

  Description:   Puts the modem in Command Mode.

  Notes:         Do not precede this command with AT.

                 <BREAK> refers to the hardware modem break signal.

                          ESCAPE SEQUENCE TIMEOUT

  Type:              Register

  Format:            AT [cmds] S32=n [cmds]

  Example:           ATS32=30<CR>

  Default:           20

  Range:             0-255

  Unit:              1 second

  Description:       Sets the maximum amount of time the modem will wait
                     for a <CR> while executing an escape sequence.

                               FALLBACK MODE

  Type:          Configuration

  Format:        AT [cmds] #Fn [cmds]

  Example:       AT #F1 O<CR>

  Description:   Sets direction of fallback.

    Command                              Function

      #F0        Fallback disabled.

      #F1        Fallback from 19.2Kbps to 4800bps as line quality
                 degrades.

      #F2        Fallback from 4800bps to 19.2Kbps as line quality
                 improves.

                         FLOW CONTROL NORMAL MODE

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Example:       AT &E11 O<CR>

  Description:   Selects normal flow control.

    Command                              Function

      &E10       Normal mode disabled.

      &E11       Normal mode enabled.

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Example:       AT &E4 &W<CR>

  Description:   Sets type of flow control used by modem.

    Command                              Function

      &E3        Flow control disabled.

      &E4        CTS/RTS flow control enabled.

      &E5        XON/XOFF flow control enabled.

                            HANDSHAKE ATTEMPTS

  Type:               Configuration

  Format:             AT [cmds] #An [cmds]

  Example:            AT #A1 #L3<CR>

  Description:        Configures the initial handshake phase.

      Command                              Function

        #A0           Attempts in order: 19.2Kbps, 16.8Kbps, 14.4Kbps,
                      12Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps.

        #A1           Attempts only 14.4Kbps.

        #A2           Attempts in order: 28.8Kbps, 24Kbps, 21.6Kbps,
                      19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps,
                      4800bps.

        #A3           Attempts in order: 2400bps, 1200bps, 300bps.

                               HELP SCREENS

  Type:          Immediate

  Format:        AT $Hn

  Example:       AT $H1<CR>

  Description:   Shows modem help screens.

    Command                              Function

      $H1        Shows help screen 1.

      $H2        Shows help screen 2.

      $H3        Shows help screen 3.

                            LIST CONFIGURATION

  Type:          Immediate

  Format:        AT Ln

  Example:       AT L5<CR>

  Description:   Lists modem configuration.

    Command                              Function

       L5        Lists all settings.

       L6        Lists the values of all S-registers.

       L7        Lists extended parameters.

       L8        Lists current diagnostics.

                          LOCAL SERIAL PORT SPEED

  Type:          Configuration

  Format:        AT [cmds] $SBnnn [cmds]

  Example:       AT $MB9600 $SB19200<CR>

  Description:   Sets serial port speed.

    Command                              Function

     $SB300      Sets 300bps speed.

    $SB1200      Sets 1200bps speed.

    $SB2400      Sets 2400bps speed.

    $SB4800      Sets 4800bps speed.

    $SB9600      Sets 9600bps speed.

    $SB19200     Sets 19.2Kbps speed.

    $SB38400     Sets 38.4Kbps speed.

    $SB57600     Sets 57.6Kbps speed.

   $SB115200     Sets 115.2Kbps speed.

                                 LOOPBACK

  Type:          Configuration

  Format:        AT [cmds] &Tn [cmds]

  Example:       AT &T5<CR>

  Description:   Enables or disables remote digital loopback response.

    Command                              Function

      &T4        Loopback response enabled.

      &T5        Loopback response disabled.

                    MAXIMUM BLOCK SIZE FOR TRANSMISSION

  Type:          Configuration

  Format:        AT [cmds] &BSn [cmds]

  Example:       AT &BS1 &MB28800<CR>

  Description:   Sets the maximum transmittable block size.

    Command                              Function

      &BS0       Maximum block size is 64 characters.

      &BS1       Maximum block size is 128 characters for LAP-M, and 256
                 characters for MNP.

                                  PACING

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Example:       AT &E13<CR>

  Description:   Selects ENQ/ACK pacing.

    Command                              Function

      &E12       Disables ENQ/ACK pacing.

      &E13       Enables ENQ/ACK pacing.

                             PACING - ENQ/ACK

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Example:       AT &E9<CR>

  Description:   Selects ENQ/ACK pacing.

    Command                              Function

      &E8        Enables ENQ/ACK pacing.

      &E9        Disables ENQ/ACK pacing.

                                  REDIAL

  Type:          Immediate

  Format:        ATA:

  Example:       ATA:<CR>

  Description:   Redials the last number dialed until it is no longer
                 busy.

                           REMOTE CONNECT SPEED

  Type:          Configuration

  Format:        AT $MBnnn

  Example:       AT $MB9600 $SB19200<CR>

  Description:   Sets maximum remote connect speed.

    Command                              Function

     $MB300      Sets 300bps connect.

    $MB1200      Sets 1200bps connect.

    $MB2400      Sets 2400bps connect.

    $MB4800      Sets 4800bps connect.

    $MB9600      Sets 9600bps connect.

    $MB14400     Sets 14.4Kbps connect.

    $MB19200     Sets 19.2Kbps connect.

                          RETRANSMIT FAIL ACTION

  Type:          Configuration

  Format:        AT [cmds] $Rn [cmds]

  Example:       AT $R1<CR>

  Description:   Sets whether the modem gives up on a bad connection.

    Command                              Function

      $R0        Hang up after 12 failed retransmissions.

      $R1        Do not hang up after 12 failed retransmissions.

                        STORE PHONE NUMBER IN NVRAM

  Type:          Configuration

  Format:        AT [cmds] D<#>Nn [dialstring]

  Example:       ATD555-1212N1<CR>

  Description:   Stores a phone number in the modems memory.

                            TRELLIS MODULATION

  Type:          Configuration

  Format:        AT [cmds] #Tn [cmds]

  Example:       AT #T1<CR>

  Description:   Controls Trellis Coded Modulation.

    Command                              Function

      #T0        Disables TCM.

      #T1        Enables TCM.

                                 V.42 MODE

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Example:       AT &E0 <CR>

  Description:   Configures the operation of V.42 mode.

    Command                              Function

      &E0        Error correction disabled.

      &E1        V.42 set to auto-reliable.

      &E2        V.42 set to reliable.

                              V.42 LOW SPEED

  Type:          Configuration

  Format:        AT [cmds] $En [cmds]

  Example:       AT $E1 <CR>

  Description:   Selects whether a V.42 connection will be attempted at
                 300bps.

    Command                              Function

      $E0        V.42 disabled at 300bps.

      $E1        V.42 enabled at 300bps.

                                 XOFF SEND

  Type:          Configuration

  Format:        AT [cmds] #Xn [cmds]

  Example:       AT #X1<CR>

  Description:   Selects how XOFF signal is sent.

    Command                              Function

      #X0        Single XOFF character sent until ready.

      #X1        Multiple XOFF characters sent until ready.

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Example:       AT &E7 O<CR>

  Description:   Selects whether XON/XOFF signals are sent to remote
                 modem.

    Command                              Function

      &E6        XON/XOFF signals trapped by local modem.

      &E7        XON/XOFF passed through local modem.

