
MULTI-TECH SYSTEMS, INC.

MT2834ZPW

Card Type                    Modem
Chip Set                     Unidentified
I/O Options                  Line in, line out, microphone in, speaker out
Maximum Modem Rate           33.6Kbps
Maximum Fax Rate             14.4Kbps
Data Modulation Protocol     Bell 103/212A

                             ITU-T V.22, V.22bis, V.32ter, V.32bis, V.34
Fax Modulation Protocol      ITU-T V.17, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis
Fax Class                    Class I
Data Bus                     16-bit ISA

[Image]

                                CONNECTIONS

        Function           Label             Function              Label

  Line out (RJ-11)              CN1      Speaker out                CN3

  Line in (RJ-11)               CN2      Microphone in              CN4

                   SUPPORTED COMMAND SET

                     Basic AT Commands

  AT, +++, A/

  A, C, E, F, H, M, Q, W, Y

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

                   Extended AT Commands

  \V

                     Special Commands

  -C

                        S Registers

  S0, S1, S2, S3, S4, S5, S10



  Note: See MHI Help File for full command documentation.



                         Proprietary AT Command Set

                            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.

                          AUXILLARY RELAY CONTROL

  Type:          Configuration

  Format:        AT [cmds] &J [cmds]

  Description:   Controls auxiliary relay

    Command                              Function

      &J0        Auxiliary relay remains open

                          COMMUNICATION PROTOCOLS

  Type:          Configuration

  Format:        AT [cmds] Bn [cmds]

  Description:   Selects the communication protocol for data calls

    Command                              Protocol

       B0        Modem will use ITU-T V.22 at 1200bps.

       B1        Modem will use Bell 212A at 1200bps.

       B2        ITU-T V.23 reverse channel disabled

       B3        ITU-T V.23 reverse channel disabled

      B15        Modem will use ITU-T V.21 at 300bps.

      B16        Modem will use Bell 103J at 300bps.

                            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

                         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

                                   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

          DSn            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.

          DV             Switch to speakerphone

          D^             Data calling tone transmission disabled

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Kn [cmds]

  Description:   Enables flow control options

    Command                              Function

      &K0        Flow control disabled

      &K3        RTS/CTS flow control enabled

      &K4        XON/XOFF flow control enabled



                                  ON-LINE

  Type:           Immediate

  Format:         AT [cmds] On

  Description:    Instructs the modem to return to on-line state.

    Command                              Function

       O0         Return to on-line state.

       O1         Return to on-line state and initiate retrain sequence.

       O3         Return to on-line state and initiate renegotiation
                  sequence.

                            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

       I9        Reports country code

                        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

                     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.

          X5             Busy and dial tone detection disabled; extended
                         result codes enabled.

          X6             Busy and dial tone detection disabled; extended
                         result codes enabled.

          X7             Busy and dial tone detection disabled; basic
                         result codes enabled.

                                SOFT RESET

  Type:                Immediate

  Format:              AT [cmds] Zn [cmds]

  Description:         Restores modem profiles previously saved in
                       non-volatile RAM using the &W command.

       Command                              Function

          Z0           Restore modem to profile saved by last &W command

          Z1           Restore modem to profile saved by last &W command



                              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

                           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

                                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

                            V.32 - AUTO-RETRAIN

  Type:            Configuration

  Format:          AT [cmds] &Bn [cmds]

  Description:     Controls auto-retrain function if poor line quality is
                   detected

     Command                             Function

       &B1         Auto-retrain enabled if line quality is poor

                            Extended AT Commands

                                BREAK TYPE

  Type:          Configuration

  Format:        AT [cmds] \Kn [cmds]

  Description:   Configures action of break signal

    Command                              Function

      \K5        Sends break received from DTE to the remote modem

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Description:   Selects data compression

    Command                              Function

      %C0        Data compression disabled

      %C1        V.42bis/MNP5 enabled



                               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        MNP reliable mode enabled

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

      \N4        V.42 reliable mode enabled

      \N5        V.42/MNP auto-reliable mode enabled

      \N7        V.42/MNP auto-reliable mode enabled

                         DISPLAY BLACKLIST NUMBERS

  Type:                  Immediate

  Format:                AT [cmds] %B [cmds]

  Description:           Displays the list of all the numbers on the
                         blacklist. Returns ERROR if blacklisting is
                         disabled.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Description:   Command nonfunctional; for compatibility purposes only

    Command                              Function

      \G0        Returns OK for backward compatibility

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] \Qn [cmds]

  Description:   Sets type of flow control used by modem

    Command                              Function

      \Q0        Flow control disabled

      \Q1        Bi-directional XON/XOFF flow control enabled

      \Q3        Bi-directional RTS/CTS flow control enabled

                             INACTIVITY TIMER

  Type:          Configuration

  Format:        AT [cmds] \Tn [cmds]

  Description:   Disables the inactivity timer

    Command                              Function

      \T0        Inactivity timer disabled

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] \Jn [cmds]

  Description:   Sets operation of serial port speed

    Command                              Function

      \J0        Serial speed locked



                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] \Xn [cmds]

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

    Command                              Function

      \X0        XON/XOFF signals trapped by local modem

                              Special Commands

                         ASYNCHRONOUS WORD LENGTH

  Type:                  Configuration

  Format:                AT [cmds] +ES=n [cmds]

  Description:           Allows an H.324 video application direct access
                         to the synchronous data channel. +ES=? Shows
                         allowable value (6) +ES? Queries setting

        Command                              Function

         +ES=6           Allows an H.324 video application direct access
                         to the synchronous data channel

                          SPEAKER CODEC LOOPBACK

  Type:          Configuration

  Format:        AT [cmds] &&S [cmds]

  Description:   Provides a loopback from the microphone to the speaker.

  Note:          For testing and debugginh purposes only

                            S(STATUS) -REGISTERS

                              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



                               DIALING DELAY

  Type:           Register

  Format          AT [cmds] S6=n [cmds]

  Range:          2-65

  Unit:           1 second

  Description:    Duration of delay after modem goes off-hook and before
                  dialing

                             INACTIVITY TIMER

  Type:                  Register

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

  Range:                 0, 5-255

  Default:               10

  Unit:                  1 second

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

                            NO CARRIER TIME-OUT

  Type:                  Register

  Format                 AT [cmds] S7=n [cmds]

  Range:                 1-255

  Unit:                  1 second

  Description:           Maximum wait time the modem uses after dialing
                         to detect a carrier signal from the remote modem
                         for both originating and answering calls.

                              PAUSE DURATION

  Type:              Register

  Format             AT [cmds] S8=n [cmds]

  Range:             0-65

  Unit:              1 second

  Description:       Duration of pause per comma (,) command used in a
                     command or dial string

                            TONE PULSE DURATION

  Type:                Register

  Format               AT [cmds] S11=n [cmds]

  Range:               50-150

  Unit:                1 ms

  Description:         DTMF tone pulse duration and time between tone
                       pulses for tone dialing operations.

                             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.

                              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.



                            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.

                         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.

