
MULTITECH SYSTEMS, INC.

MT1432BC/MT1432BCI

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.21CH2, V.27ter, V.29
Error Correction/Compression MNP2-5, V.42, V.42bis

[Image]

                                CONNECTIONS

         Purpose           Location            Purpose           Location

  Line in                     CN1       Line out                   CN2

                       INTERRUPT SELECTION

    IRQ       JP1/A      JP1/B      JP1/C      JP1/D     JP1/E

     2       Closed      Open       Open       Open       Open

     3        Open      Closed      Open       Open       Open

     4        Open       Open      Closed      Open       Open

     5        Open       Open       Open      Closed      Open

     7        Open       Open       Open       Open      Closed

    BASE I/O ADDRESS SELECTION MODE

        Mode               SW1/8

   DOS compatible          Off

      Extended              On

                 EXTENDED MODE BASE I/O ADDRESS SELECTION

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

    100h       Off      On       On       On       On       On       On

    200h       On       Off      On       On       On       On       On

    300h       Off      Off      On       On       On       On       On

    400h       On       On       Off      On       On       On       On

    500h       Off      On       Off      On       On       On       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)

           DTR MODE

     Mode          SW2/1

   Normal          Off

  Forced high        On

  COMPATIBLE MODE BASE I/O ADDRESS SELECTION

    Address          SW2/2          SW2/3

  COM1: (3F8h)        On              On

  COM2: (2F8h)        On             Off

  COM3: (3E8h)        Off             On

  COM4: (2E8h)        Off            Off

     CARRIER DETECT MODE

     Mode          SW2/4

   Normal          Off

  Forced high        On

  FACTORY CONFIGURED - DO NOT ALTER

      Jumper            Position

        S32               Open



                          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.

                             CALLBACK ATTEMPTS

  Type:          Register

  Format:        AT [cmds] S16=n [cmds]

  Example:       ATS16=6<CR>

  Default:       4

  Range:         1-255

  Unit:          1 attempt

  Description:   Sets the maximum number of login attempts after initial
                 callback connection.

                              CALLBACK NUMBER

  Type:               Configuration

  Format:             AT [cmds] [+/-]DT<#>Nnn

  Examples:           AT#DB2 +-DT555-1212N10<CR>

  Description:        Sets the phone number associated with the password
                      at memory location nn.

       Command                             Function

         +DT          Modem will initiate callback on successful login.

         -DT          Modem will allow immediate entry on successful
                      login without callback.

        +-DT          If password is followed by a -, modem will allow
                      immediate entry. If password is followed by a + or
                      nothing, modem will initiate callback.

                              CALLBACK PARITY

  Type:          Configuration

  Format:        AT [cmds] #Pn [cmds]

  Example:       AT #P0 #DB1<CR>

  Description:   Sets the parity of the modem when in callback mode.

    Command                              Function

   #P0          No parity.

      #P1        Odd parity.

      #P2        Even parity.

                             CALLBACK PASSWORD

  Type:                Configuration

  Format:              AT [cmds] #CBNnnxxxx

  Example:             AT#DB2 #CBN09snarf<CR>

  Description:         Sets the callback password at memory location nn
                       to xxxx. The password must be between 6 and 10
                       characters, inclusive.

                             CALLBACK SECURITY

  Type:          Configuration

  Format:        AT [cmds] #DBn [cmds]

  Example:       AT #DB1 S0=1<CR>

  Description:   Sets the security level of the callback function.

    Command                              Function

   #DB0         Disables security and clears callback memory.

      #DB1       Enables remote security only.

      #DB2       Enables local and remote security.

                            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 DIALING

  Type:          Configuration

  Format:        AT [cmds] $Dn [cmds]

  Example:       AT $D1 DT555-1212<CR>

  Description:   Turns DTR dialing on and off.

    Command                              Function

   $D0          DTR dialing disabled.

      $D1        DTR dialing enabled.

                                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.

                          ERASE CALLBACK PASSWORD

  Type:          Immediate

  Format:        AT [cmds] #RCBNn [cmds]

  Example:       AT #RCBN05 #RDN05<CR>

  Description:   Erases the callback password at the memory location
                 specified.

                           ERASE CALLBACK NUMBER

  Type:          Immediate

  Format:        AT [cmds] #RDNn [cmds]

  Example:       AT #RCBN05 #RDN05<CR>

  Description:   Erases the callback phone number at the memory location
                 specified.

                    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.

                             FACTORY DEFAULTS

  Type:          Immediate/Configuration

  Format:        AT &F[n]

  Example:       AT &F8<CR>

  Description:   Loads factory defaults, or sets write protect on NVRAM.

    Command                              Function

       &F        Reloads defaults by setting. (Immediate, see below.)

   &F8          Sets &F to read factory defaults from ROM, and disables
                 NVRAM write protect.

      &F9        Sets &F to read defaults from NVRAM, and enables
                 write-protect.

                         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: 14.4Kbps, 12Kbps, 9600bps, 4800bps,
                  2400bps, 1200bps, 300bps.

      #A1         Attempts only 14.4Kbps.

      #A2         Attempts in order: 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.

                          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 300baud speed.

    $SB1200      Sets 1200baud speed.

    $SB2400      Sets 2400baud speed.

    $SB4800      Sets 4800baud speed.

    $SB9600      Sets 9600baud speed.

    $SB19200     Sets 19.2Kbaud speed.

    $SB38400     Sets 38.4Kbaud speed.

    $SB57600     Sets 57.6Kbaud speed.

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] $BAn [cmds]

  Example:       AT $SB57600 $BA0<CR>

  Description:   Sets operation of serial port speed.

    Command                              Function

   $BA0         Serial speed locked at rate set by $SB.

      $BA1       Serial speed follows connect speed, ignoring $SB.

                              LOGIN PASSWORD

  Type:                Configuration

  Format:              AT [cmds] #Ixxxx

  Example:             AT #IMicroHouse<CR>

  Description:         Sets the login password to xxxx. The password must
                       be between 6 and 10 characters, case sensitive. It
                       defaults to MULTI-TECH.

                    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

     $MB75       Sets V.23 (1200bps/75bps bi-directional).

     $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.

                          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.

                               UUCP SPOOFING

  Type:          Configuration

  Format:        AT [cmds] $SPn [cmds]

  Example:       AT $SP1 O<CR>

  Description:   Controls the UUCP spoofing function.

    Command                              Function

   $SP0         Spoofing disabled.

      $SP1       Spoofing enabled.

                                 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.

                           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.

