
MULTI-TECH SYSTEMS, INC.

MT3334ZDX, MT3334ZDXV

Card Type                    Modem, Fax
Chip Set                     Unidentified
I/O Options                  Serial ports, power jack, line in, line out
Maximum Modem Rate           33.6Kbps
Maximum Fax Rate             14.4Kbps
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.32bis, V.34
Fax Modulation Protocol      ITU-T V.17
Error Correction/Compression MNP5, V.42, V.42bis
Fax Class                    Unidentified
Data Bus                     External

[Image]

                                CONNECTIONS

         Function            Label            Function             Label

  Line in via RJ-11               CN1       Serial port             CN3

  Line out via RJ-11              CN2       Power jack              CN4

                             DIAGNOSTIC LED(S)

    LED            Color          Status               Condition

     TD        Unidentified      Blinking       Modem transmitting data

     TD        Unidentified         Off       Modem not transmitting data

     RD            Unidentified  Blinking       Modem is receiving data

     RD        Unidentified         Off       Modem is not receiving data

     CD        Unidentified         On          Carrier signal detected

     CD        Unidentified         Off       Carrier signal not detected

    V.34       Unidentified         On          Modem connected in V.34
                                                   mode at 33.6Kbps

    V.34       Unidentified         Off        Modem is not connected in
                                                 V.34 mode at 33.6Kbps

  V.32bis      Unidentified         On         Modem connected in V.32bis
                                                     mode or less

  V.32bis      Unidentified         Off        Modem is not connected in
                                                     V.32bis mode

    9.6        Unidentified         On           Modem is connected at
                                                        9.6Kbps

    9.6        Unidentified         Off        Modem is not connected at
                                                        9.6Kbps

     OH        Unidentified         On             Modem is on-hook

     OH        Unidentified         Off            Modem is off-hook

     TR            Unidentified     On            DTR signal is high

     TR        Unidentified         Off            DTR signal is low

     EC        Unidentified         On        Modem is set for V.42 error
                                                      compression

     EC        Unidentified         Off        Modem is not set for V.42
                                                   error compression

     EC        Unidentified      Blinking      Data compression enabled

    FAX            Unidentified     On           Modem is in Fax mode

    FAX        Unidentified         Off        Modem is not in Fax mode

                   SUPPORTED COMMAND SET

                     Basic AT Commands

  AT, A/

  A, B, E, F, H, M, O, Q, S, V, Y, Z

  &C, &F, &G, &V, &Z

                   Extended AT Commands

  \V

                        S Registers

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



  Note: See MHI Help File for full command documentation.

                         Proprietary AT Command Set

                             TRANSMIT CARRIER

  Type:          Configuration

  Format:        AT [cmds] Cn [cmds]

  Description:   Controls the transmit carrier switching

    Command                              Function

       C1        Transmit carrier enabled

                                   DIAL

  Type:                  Immediate

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

  Description:           Dials telephone number according to any
                         modifiers included in the string

  Note:                  Any combination of modifiers can be used to
                         produce the desired dial functions in sequence.

        Command                              Function

          DL             Re-dial last number

          DP             Pulse dialing enabled

         DS=n            Dial stored telephone number n

          DT             Tone dialing enabled/Pulse dialing disabled

          DW             Dialing resumed following dial tone detection

          D,             Dialing paused for amount of time specified in
                         S8 register

          D!             Flash function initiated. Modem commanded to go
                         off-hook for specified time before returning
                         on-hook.

          D@             Wait for quiet Answer function enabled. Modem
                         waits until a "quiet answer," a ring-back signal
                         followed by silence up to the time specified in
                         S7, is received prior to executing the rest of
                         the dial string.

          D;             Modem returned to idle state after dialing. The
                         semicolon can only be placed at the end of the
                         dial command.

          D$             Calling card "Bong" detection enabled

          DV             Switch to speakerphone

          D^             Data calling tone transmission disabled

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0        Reports default speed and controller firmware code

       I1        Reports ROM checksum

       I2        Tests and reports ROM checksum

       I3        Reports default speed and controller firmware code

       I4        Reports data pump model and revision code

                              SPEAKER VOLUME

  Type:          Configuration

  Format:        AT [cmds] Ln [cmds]

  Description:   Controls speaker volume

    Command                              Function

       L0        Low volume setting

       L1        Low volume setting

       L2        Medium volume setting

       L3        Highest volume setting

                            AUTO-MODE DETECTION

  Type:                  Configuration

  Format:                AT [cmds] Nn [cmds]

  Description:           Selects various options for the automatic
                         detection and negotiation of protocols during
                         the handshake process if the modem is
                         communicating with a remote modem of dissimilar
                         speed.

        Command                              Function

          N0             In originate mode, handshake begins at line
                         speed designated by the S37 register and the B
                         command

          N1             In originate mode, handshake begins at line
                         speed designated by the S37 register. and the B
                         command Modem can shift to a slower speed if
                         necessary.

                     SELECT CALL PROGRESS RESULT CODES

  Type:                  Configuration

  Format:                AT [cmds] Xn [cmds]

  Description:           Enables selection of tone detection and
                         associated result code format options

        Command                              Function

          X0             Busy and dial tone detection disabled; basic
                         result codes enabled.

          X1             Busy and dial tone detection disabled; extended
                         result codes enabled.

          X2             Busy tone detection disabled, dial tone
                         detection enabled; extended result codes
                         enabled.

          X3             Busy tone detection enabled, dial tone detection
                         disabled; extended result codes enabled.

          X4             Busy and dial tone detection disabled; extended
                         result codes enabled.

                         DATA TERMINAL READY (DTR)

  Type:                  Configuration

  Format:                AT [cmds] &Dn [cmds]

  Description:           Selects modem response to DTR

        Command                              Function

          &D0            Modem does not respond to DTR

          &D1            Modem goes to command mode after DTR goes is off

          &D2            Modem goes to command mode and disconnects
                         (hangs up) after DTR goes off; Auto-Answer is
                         disabled.

          &D3            Modem is initialized after DTR goes off

                          AUXILLARY RELAY CONTROL

  Type:          Configuration

  Format:        AT [cmds] &J [cmds]

  Description:   Controls auxiliary relay

    Command                              Function

      &J0        Auxiliary relay remains open

      &J1        Not supported

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Kn [cmds]

  Description:   Enables flow control options

    Command                              Function

      &K0        Flow control disabled

      &K3        RTS to CTS flow control enabled

      &K4        XON/XOFF flow control enabled

                            COMMUNICATIONS MODE

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Description:   Selects communications mode

    Command                                Mode

      &M0        Asynchronous mode

                            COMMUNICATIONS MODE

  Type:           Configuration

  Format:         AT [cmds] &Qn [cmds]

  Description:    Selects communications mode options

    Command                                Mode

      &Q0         Asynchronous mode, serial port speed follows connect
                  speed.

      &Q5         Error correction mode

      &Q6         Buffered asynchronous mode

                           DATA SET READY (DSR)

  Type:          Configuration

  Format:        AT [cmds] &Sn [cmds]

  Description:   Selects DSR options

    Command                              Function

      &S0        DSR forced high

      &S1        DSR high only while modem is connected

                                TEST MODES

  Type:          Immediate

  Format:        AT [cmds] &Tn

  Description:   Selects test options

    Command                              Function

      &T0        End current test

      &T1        Begin local analog loopback test

      &T3        Begin local digital loopback

      &T6        Request remote digital loopback

                           STORE ACTIVE PROFILE

  Type:            Configuration

  Format:          AT [cmds] &Wn [cmds]

  Description:     Writes the values for the active profile into the
                   non-volatile RAM

     Command                              Function

       &W0         Write the active profile to NVRAM

                        RESTORE PROFILE ON POWER-UP

  Type:               Configuration

  Format:             AT [cmds] &Yn [cmds]

  Description:        Restores a selected profile into the active profile
                      on power-up (hard reset)

      Command                              Function

        &Y0           Restore profile 0 on power-up

                            Extended AT Commands

                                BREAK TYPE

  Type:                     Configuration

  Format:                   AT [cmds] \Kn [cmds]

  Description:              Configures action of break signal

     Command        Break from DTE    Modem receives \B    Break received
                                                            from remote
                                                               modem

       \K5         Send break with    Send break with     Break sent with
                   transmitted data   transmitted data    received data
                                                          to the DTE

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Description:   Controls the type of connection the modem will operate
                 in

    Command                              Function

      \N0        Normal mode enabled

      \N1        Direct mode enabled

      \N2        Reliable mode enabled

      \N3        V.42/MNP auto-reliable mode enabled

      \N4        V.42 reliable mode enabled

      \N5        V.42, MNP, or normal mode

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Description:   Selects data compression

    Command                              Function

      %C0        Data compression disabled

      %C1        V.42bis/MNP5 enabled

                              Special Commands

                                DTR DIALING

  Type:          Configuration

  Format:        AT [cmds] $Dn [cmds]

  Description:   Enables/disables DTR dialing

    Command                              Function

      $D0        DTR dialing disabled

      $D1        DTR dialing enabled

                              MODEM BAUD RATE

  Type:          Configuration

  Format:        AT [cmds] $MBn [cmds]

  Description:   Selects modem baud rate

    Command                              Function

     $MB75       CCITT V.23 mode

     $MB300      300bps

    $MB1200      1200bps

    $MB2400      2400bps

    $MB4800      4800bps

    $MB9600      9600bps

    $MB14400     14.4Kbps

    $MB19200     19.2Kbps

    $MB28800     28.8Kbps

    $MB33600     33.6Kbps

                           SERIAL PORT BAUD RATE

  Type:          Configuration

  Format:        AT [cmds] $SBn [cmds]

  Description:   Selects serial port baud rate

    Command                              Function

     $SB300      300bps

    $SB1200      1200bps

    $SB2400      2400bps

    $SB4800      4800bps

    $SB9600      9600bps

    $SB19200     19.2Kbps

    $SB38400     38.4Kbps

    $SB57600     57.6Kbps

   $SB115200     115.2Kbps

                            S(STATUS) -REGISTERS

                             ESCAPE CHARACTER

  Type:          Register

  Format         AT [cmds] S9=n [cmds]

  Range:         1-127

  Unit:          ASCII

  Description:   Defines remote configuration escape character.

                              V.34 MODULATION

  Type:          Register

  Format         AT [cmds] S28=n [cmds]

  Range:         0-255

  Unit:          Decimal

  Description:   Enables V.34 modulation

            Note: S28=0 disables V.34 modulation.

                             V.25 CALLING TONE

  Type:                Register

  Format               AT [cmds] S35=n [cmds]

  Range:               0-1

  Unit:                Decimal

  Description:         Enables V.25 data calling tone, which allows
                       remote data/fax/voice discrimination

            Note: S35=0 disables V.25 data calling tone.

                       ERROR CORRECTION NEGOTIATION

  Type:                      Register

  Format                     AT [cmds] S36=n [cmds]

  Description:               Selects the action of the modem if it fails
                             to connect when error control is selected.

      Command               S48=7                      S48=128

       S36=0        LAPM or hang-up          Not used

       S36=1        LAPM or Asynchronous     Asynchronous

       S36=2        LAPM or hang-up          Not used

       S36=3        LAPM or Asynchronous     Asynchronous

       S36=4        LAPM, MNP, or hang-up    MNP or hang-up

       S36=5        LAPM, MNP, or            MNP or Asynchronous
                    Asynchronous

       S36=6        LAPM, MNP, or hang-up    MNP or hang-up

       S36=7        LAPM, MNP, or            MNP or Asynchronous
                    Asynchronous

                              DCE LINE SPEED

  Type:                Register

  Format               AT [cmds] S37=n [cmds]

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

       Command                              Function

        S37=0          Maximum speed

        S37=1          Reserved

        S37=2          1200/75bps

        S37=3          300bps

        S37=4          Reserved

        S37=5          1200bps

        S37=6          2400bps

        S37=7          4800bps

        S37=8          7200bps

        S37=9          9600bps

       S37=10          12.0Kbps

       S37=11          14.4Kbps

       S37=12          16.8Kbps

       S37=13          19.2Kbps

       S37=14          21.6Kbps

       S37=15          24.0Kbps

       S37=16          26.4Kbps

       S37=17          28.8Kbps

       S37=18          31.2Kbps

       S37=19          33.6Kbps

                         V32bis, V.22bis AUTO RATE

  Type:             Register

  Format            AT [cmds] S42=n [cmds]

  Range:            0-1

  Unit:             Decimal

  Description:      Enables V.32bis and V.22bis auto rate

            Note: S42=0 disables V.32bis and V.22bis auto rate. For
            testing purposes only.

                            V32bis STARTUP MODE

  Type:             Register

  Format            AT [cmds] S43=n [cmds]

  Range:            0-1

  Unit:             Decimal

  Description:      Enables V.32bis start-up auto mode operation

            Note: S43=0 disables V.32bis start-up auto mode. For testing
            purposes only.

                            FEATURE NEGOTIATION

  Type:                   Register

  Format:                AT [cmds] S48=n [cmds]

  Range:                  7, 128

  Description:           Selects active error correction and compression
                         protocols. See S36, error correction negotiation
                         table

                             INACTIVITY TIMER

  Type:                  Register

  Format:                AT [cmds] S89=n [cmds]

  Range:                 0, 5-255

  Unit:                  1 second

  Description:           Sets the length of time that the modem does not
                         receive information before it disconnects; S89=0
                         will disable.

