
MULTI-TECH SYSTEMS, INC.

MT1432MF, MT1432MG, MT1432MK, MT1432MU, MT1432MUI

Card Type                    Modem (asynchronous)
Chipset                      Multi-Tech Systems, Inc.
Maximum Data Rate            14.4Kbps
Maximum Fax Rate             14.4Kbps
Data Modulation              Bell 103A, 113, 212A

                             ITU-T V.21 (MT1432MUI only), V.22, V.22bis,
                             V.23, V.32, V.32bis
Fax Modulation               ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis
Fax Class                    Class II
Data Bus                     Serial

[Image]

                                CONNECTIONS

          Function            Label            Function             Label

  9V DC power in               CN1     Telephone line out           CN3

  Serial port                  CN2

                              POWER MODE

              Setting                             SW1

  Standby, wait for incoming call              Position 1

                Off                            Position 2

                On                             Position 3

                             DIAGNOSTIC LED(S)

     LED              Color           Status            Condition

      TD               Red              On         Modem is transmitting
                                                           data

      TD               Red              Off            Modem is not
                                                    transmitting data

      RD               Red              On       Modem is receiving data

      RD               Red              Off       Modem is not receiving
                                                           data

      CD               Red              On       Carrier signal detected

      CD               Red              Off         Carrier signal not
                                                         detected

  14 Status     Color    96 Status     Color            Condition

     On          Red        On          Red         Modem connected at
                                                    12Kbps in V.32bis

     Off         Red        On          Red         Modem connected at
                                                         9600bps

     On          Red        Off         Red         Modem connected at
                                                        14.4Kbps

     Off         Red        Off         Red         Modem connected at
                                                   slower than 9600bps

                         DIAGNOSTIC LED(S) (CON'T)

    LED         Color         Status                 Condition

     24          Red            On           Modem connected at 2400bps

     24          Red            Off        Modem not connected at 2400bps

     12          Red            On           Modem connected at 1200bps

     12          Red            Off        Modem not connected at 1200bps

     OH          Red            On               Modem is off-hook

     OH          Red         Blinking      Modem is dialing in pulse mode

     OH          Red            Off               Modem is on-hook

     TR          Red            On               DTR signal is high

     TR          Red            Off              DTR signal is low

     EC          Red            On            Error correction enabled

     EC          Red         Blinking         Data compression enabled

     EC          Red            Off          Error correction disabled

     FX          Red            On         Modem is connected in FAX mode

     FX          Red            Off         Modem is not connected in FAX
                                                        mode

     LB          Red            On           Battery is low (approx. 10
                                                   minutes left)

     LB          Red            Off               Battery is good

                 SUPPORTED STANDARD COMMANDS

                      Basic AT Commands

  +++, A/

  A, B, D, E, H, M, O, P, T, V, X, Y, Z

  &D, &G, &P, &T

                         S-Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S25, S30

            Note: See MHI help file for complete information.

                         Proprietary AT Command Set

                          AUTO-RELIABLE FALLBACK

  Type:               Configuration

  Format:             AT [cmds] $Fn [cmds]

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

      Command                              Function

        $F0           Auto-reliable fallback disabled.

        $F1           Auto-reliable fallback enabled.

                  AUTO-RELIABLE TIME BUFFER CONFIGURATION

  Type:               Configuration

  Format:             AT [cmds] $An [cmds]

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

      Command                              Function

        $A0           Data is discarded.

        $A1           Data is buffered.

                                BREAK TIME

  Type:           Register

  Format:         AT [cmds] S17=n [cmds]

  Default:        25

  Range:          0 - 255

  Unit:           10 mS

  Description:    Sets the length of the break signal that the modem will
                  send.

                               CALLING TONE

  Type:           Configuration

  Format:         AT [cmds] $Tn [cmds]

  Description:    Controls the transmission of the calling tone while
                  dialing.

    Command                              Function

      $T0         Calling tone enabled.

      $T1         Calling tone disabled.

                                COMMAND SET

  Type:          Configuration

  Format:        AT [cmds] &Qn [cmds]

  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 [cmds] &En [cmds]

  Description:   Selects data compression.

    Command                              Function

      &E14       Data compression disabled.

      &E15       Data compression enabled.

                             COMPRESSION MODE

  Type:          Configuration

  Format:        AT [cmds] #Ln [cmds]

  Description:   Selects the active data compression protocols.

    Command                              Function

      #L0        MNP and V.42 negotiation enabled.

      #L1        MNP negotiation enabled.

      #L2        V.42 negotiation enabled.

      #L3        V.42 enabled, no negotiation.

                                CTS SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Rn [cmds]

  Description:   Controls the behaviour of the CTS signal.

    Command                              Function

      &R0        CTS normal.

      &R1        CTS forced high.

      &R2        CTS forced high except for 1 second at disconnect.

                     CTS, DCD, AND DSR DISCONNECT TIME

  Type:                  Register

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

  Default:               20

  Range:                 0 - 255

  Unit:                  50 mS

  Description:           Selects the amount of time that the CTS, DCD,
                         and DSR signals will be forced low at disconnect
                         if this option is selected by the &R, &C, and &S
                         commands, respectively. See these commands for
                         more information.

                              CTS/RTS SIGNALS

  Type:                  Configuration

  Format:                AT [cmds] &RFn [cmds]

  Description:           Selects whether the state of the CTS signal is
                         dependent on the state of the RTS signal.

        Command                              Function

         &RF0            CTS follows RTS.

         &RF1            CTS is independent of RTS.

                                DATA FORMAT

  Type:          Configuration

  Format:        AT [cmds] $EBn [cmds]

  Description:   Selects the data format of the serial port.

    Command                              Function

      $EB0       Sets 10-bit mode.

      $EB1       Sets 11-bit mode.

                                DCD SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Cn [cmds]

  Description:   Configures the behavior of the carrier detect signal.

    Command                              Function

      &C0        CD forced high.

      &C1        CD normal.

      &C2        CD forced high except during disconnect.

      &C4        Modem resets on low CD.

                         DIAL STORED PHONE NUMBER

  Type:                   Immediate

  Format:                 AT [cmds] Na [Nb, Nc...]

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

                            DISPLAY INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested about the modem.

    Command                              Function

       I0        Displays product identification code.

       I1        Displays firmware version.

       I2        Displays product name.

                           DISPLAY CONFIGURATION

  Type:                  Immediate

  Format:                AT Ln

  Description:           Displays the requested information about the
                         modem's current configuration and command
                         settings.

        Command                              Function

          L0             Displays stored phone numbers.

          L5             Displays all settings.

          L6             Displays the values of all S-registers.

          L7             Displays extended parameters.

                                DSR SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Sn [cmds]

  Description:   Controls the behaviour of the DSR signal.

    Command                              Function

      &S0        DSR forced high.

      &S1        DSR normal.

      &S2        DSR forced high except for 1 second at disconnect.

                              DSR/DCD SIGNALS

  Type:                  Configuration

  Format:                AT [cmds] &SFn [cmds]

  Description:           Selects whether the state of the DSR signal is
                         dependent on the state of the DCD signal.

        Command                              Function

         &SF0            DSR follows DCD.

         &SF1            DSR is independent of DCD.

                        ESCAPE SEQUENCE BUFFER SIZE

  Type:                 Register

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

  Default:              10

  Range:                0-60

  Unit:                 1 byte

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

                       ESCAPE SEQUENCE - OUT OF BAND

  Type:          Immediate

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

  Description:   Puts the modem in Command Mode.

                          ESCAPE SEQUENCE TIMEOUT

  Type:                   Register

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

  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.

                           ESCAPE SEQUENCE TYPE

  Type:           Configuration

  Format:         AT [cmds] %En [cmds]

  Description:    Sets type of command escape sequence the modem will
                  recognise.

     Command                             Function

       %E0        Command escape disabled.

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

       %E2        <BREAK> AT method.

       %E3        Both TIES and BREAK methods.

                         ESCAPE SEQUENCE RESPONSE

  Type:            Configuration

  Format:          AT [cmds] %En [cmds]

  Description:     Sets the response that the modem will give to an
                   escape sequence.

       %E4         OK response to command escape disabled.

       %E5         OK response to command escape enabled.

                             FACTORY DEFAULTS

  Type:               Immediate/Configuration

  Format:             AT [cmds] &Fn [cmds]

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

      Command                              Function

        &F0           Reloads defaults by setting.

        &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.

                               FALLBACK MODE

  Type:           Configuration

  Format:         AT [cmds] #Fn [cmds]

  Description:    Sets direction of fallback.

    Command                              Function

      #F0         Fallback disabled.

      #F1         Fallback from 14.4Kbps to 2400bps as line quality
                  degrades.

      #F2         Fallback from 2400bps to 14.4Kbps as line quality
                  improves.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Description:   Selects flow control.

    Command                              Function

      &E12       Flow control disabled.

      &E13       Flow control enabled.

                          FLOW CONTROL - ENQ/ACK

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Description:   Selects Hewlett-Packard ENQ/ACK pacing.

    Command                              Function

      &E8        Enables Hewlett-Packard ENQ/ACK pacing.

      &E9        Disables Hewlett-Packard ENQ/ACK pacing.

                        FLOW CONTROL IN NORMAL MODE

  Type:                 Configuration

  Format:               AT [cmds] &En [cmds]

  Description:          Selects whether the modem will use XON/XOFF flow
                        control for non-error-correcting connections.

       Command                              Function

         &E10           XON/XOFF disabled for non-error-correcting
                        connections.

         &E11           XON/XOFF enabled for non-error-correcting
                        connections.

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Description:   Sets the 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]

  Description:           Configures which speeds the modem may attempt to
                         connect at during the initial handshake phase.

        Command                              Function

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

          #A1            Attempts 14.4Kbps connection only.

          #A2            Attempts in order: 14.4Kbps, 9600bps, 4800bps.

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

                               HELP SCREENS

  Type:          Immediate

  Format:        AT $Hn

  Description:   Shows modem help screens.

    Command                              Function

      $H1        Shows help screen 1.

      $H2        Shows help screen 2.

      $H3        Shows help screen 3.

                          LOCAL SERIAL PORT SPEED

  Type:          Configuration

  Format:        AT [cmds] $SBnnn [cmds]

  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.

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] $BAn [cmds]

  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.

                                LINE SPEED

  Type:                  Configuration

  Format:                AT $MBnnn

  Description:           Sets the maximum allowable data exchange rate
                         attempted during the handshaking process.

        Command                             Function

         $MB75           Sets V.23 1200/75bps maximum connect speed.

        $MB300           Sets 300bps maximum connect speed.

        $MB1200          Sets 1200bps maximum connect speed.

        $MB2400          Sets 2400bps maximum connect speed.

        $MB4800          Sets 4800bps maximum connect speed.

        $MB9600          Sets 9600bps maximum connect speed.

       $MB14400          Sets 14.4Kbps maximum connect speed.

                              LOGIN PASSWORD

  Type:                  Configuration

  Format:                AT [cmds] #Ixxxx

  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]

  Description:   Sets the maximum transmittable block size for MNP mode.

    Command                              Function

      &BS0       Maximum block size is 64 characters.

      &BS1       Maximum block size is 256 characters.

                                  PARITY

  Type:          Configuration

  Format:        AT [cmds] #Pn [cmds]

  Description:   Sets the parity of the serial port.

    Command                              Function

      #P0        No parity.

      #P1        Odd parity.

      #P2        Even parity.

                                  REDIAL

  Type:          Immediate

  Format:        A:

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

  Note:          Do not precede this command with AT or follow it with
                 <CR>

                      REMOTE CONFIGURATION CHARACTER

  Type:                  Register

  Format:                AT [cmds] S13=n [cmds]

  Default:               37

  Range:                 0 - 127

  Unit:                  1 ASCII character

  Description:           Defines the character that when received three
                         times within the guard time set by S12, will
                         notify the modem that a remote configuration
                         session has been requested by the remote modem.

                               RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] Qn [cmds]

  Description:   Enables modem to send result codes to the DTE.

    Command                              Function

       Q0        Result codes enabled.

       Q1        Result codes disabled.

       Q2        Result codes sent in originate mode only.

                          RETRANSMIT FAIL ACTION

  Type:          Configuration

  Format:        AT [cmds] $Rn [cmds]

  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.

                              SETUP PASSWORD

  Type:                  Configuration

  Format:                AT [cmds] #Sxxxx

  Description:           Sets the setup password to xxxx. The password
                         must be between 6 and 10 characters, case
                         sensitive. It defaults to MODEMSETUP.

                           STORE ACTIVE PROFILE

  Type:                 Configuration

  Format:               AT [cmds] &Wn [cmds]

  Description:          Writes the values for the active profile into the
                        NVRAM.

       Command                              Function

         &W0            Write the active profile to stored profile 0

         &W1            Does not write active profile; modem will read
                        factory defaults on power-up or reset.

                                TEST MODES

  Type:          Immediate

  Format:        AT [cmds] Un

  Description:   Puts the modem into the selected test mode.

    Command                              Function

       U0        Begin local analog loopback test in originate mode.

       U1        Begin local analog loopback test in answer mode.

       U2        Request remote digital loopback.

       U3        Begin local digital loopback.

                              TRELLIS CODING

  Type:          Configuration

  Format:        AT [cmds] #Tn [cmds]

  Description:   Selects whether the modem will use trellis coding.

    Command                              Function

      #T0         Trellis coding disabled.

      #T1         Trellis coding enabled.

                               UUCP SPOOFING

  Type:          Configuration

  Format:        AT [cmds] $SPn [cmds]

  Description:   Controls the UUCP spoofing function.

    Command                              Function

      $SP0       Spoofing disabled.

      $SP1       Spoofing enabled.

                                 V.42 MODE

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  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 WITH V.21

  Type:                 Configuration

  Format:               AT [cmds] $En [cmds]

  Description:          Selects whether the modem will use V.42 error
                        correction at V.21 300bps connections.

       Command                              Function

         $E0            V.42 disabled at 300bps.

         $E1            V.42 enabled at 300bps.

                                 XOFF MODE

  Type:          Configuration

  Format:        AT [cmds] #Xn [cmds]

  Description:   Selects how XOFF characters are sent.

    Command                              Function

      #X0        Single XOFF character sent.

      #X1        Multiple XOFF characters sent until DTE responds.

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  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.

