
MULTI-TECH SYSTEMS, INC.

MT5634ZBA, MT5634ZBAV

Card Type                          Modem
Chip Set                           Unidentified
I/O Options                        25-pin serial port, power, line in,
                                   line out, microphone in, speaker jack
Maximum Modem Rate                 56Kbps
Maximum Fax Rate                   14.4Kbps
Data Modulation Protocol           Bell 103/212A

                                   ITU-T V.22, V.22bis, V.32ter, V.32bis,
                                   V.34, K56flex
Fax Modulation Protocol            ITU-T V.17, V.27ter, V.29
Error Correction/Compression       MNP5, V.42, V.42bis
Fax Class                          Unidentified
Data Bus                           External

[Image]

                                CONNECTIONS

        Function           Label             Function              Label

  Line in (RJ-11)               CN1      Microphone in              CN5

  Line out (RJ-11)              CN2      Speaker jack               CN6

  25-pin serial port            CN3      Power switch               SW1

  Power jack                    CN4

                        USER CONFIGURABLE SETTINGS

                  Function                     Label        Position

  Stereo speaker mode enabled                    J8          Closed

  Mono speaker mode enabled                      J8           Open

  Dial mode enabled                             J10         Pins 2 & 3
                                                             closed

  Leased line enabled                           J10         Pins 1 & 2
                                                             closed

  Answer mode mode enabled                      J11         Pins 2 & 3
                                                             closed

  Originate mode enabled                        J11         Pins 1 & 2
                                                             closed





                             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

   56       Unidentified         On         Modem connected in K56flex or
                                                     V.PCM mode

   56       Unidentified        Off           Modem is not connected in
                                               K56flex or V.PCM mode

   33       Unidentified         On         Modem connected in V.34 mode
                                              at speeds up to 33.6Kbps

   33       Unidentified        Off        Modem is not connected in V.34
                                           mode at speeds up to 33.6Kbps

   14       Unidentified         On          Modem connected in V.32bis
                                                  mode at 14.4Kbps

   14       Unidentified        Off           Modem is not connected in
                                              V.32bis mode at 14.4Kbps

   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

   FX          Unidentified      On             Modem is in Fax mode

   FX       Unidentified        Off           Modem is not in Fax mode

                   SUPPORTED COMMAND SET

                     Basic AT Commands

  AT, +++, A/

  A, E, F, H, M, O, P, Q, T, V, W, Y

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

                   Extended AT Commands

  \A, \B, \J, \K, \T, \X

                     Special Commands

  -C

                        S Registers

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



  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

       &Q8          MNP error correction mode. Fallback according to
                    register S36

       &Q9          V.42 or MNP error correction mode. Fallback according
                    to register S36

                           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

         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

                               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

                                  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

        I5         Reports board ID: software version, hardware version,
                   & country ID

        I9         Reports country code

       I11         Reports diagnostic information for the last modem
                   connection

                        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

                               RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] Qn [cmds]

  Description:   Enables modem to send result codes to the DTE

    Command                              Function

       Q0        Result code sending enabled

       Q1        Result code sending disabled

       Q2        Returns OK for backward compatibility

                     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 setting to profile saved by last &W
                       command

          Z1           Restore setting 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

       &W1         Clears user default settings from 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

                             TRANSMIT CARRIER

  Type:          Configuration

  Format:        AT [cmds] Cn [cmds]

  Description:   Controls the transmit carrier switching

    Command                              Function

       C1        Transmit carrier enabled

                            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

                        AUTO-FALLBACK/FALL-FORWARD

  Type:          Configuration

  Format:        AT [cmds] %En [cmds]

  Description:   Controls auto-retrain mode and fallback/fall-forward

    Command                              Function

      %E0        Auto-fallback/fall-forward disabled

      %E1        Auto-fallback enabled; fall-forward disabled

      %E2        Auto-fallback/fall-forward enabled

                                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.

                           EXTENDED RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] \Vn [cmds]

  Description:   Selects extended result codes

    Command                              Function

      \V0        Extended result codes disabled

      \V1        Extended result codes enabled

      \V2        Extended result codes enabled

                               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

                              Special Commands

                               11-BIT PARITY

  Type:          Configuration

  Format         AT [cmds] #Pn [cmds]

  Description:   Sets the 11-bit parity options

    Command                              Function

      #P0        No parity enabled

      #P0        Odd parity enabled

      #P2        Even parity enabled

                         ASYNCHRONOUS WORD LENGTH

  Type:          Configuration

  Format:        AT [cmds] $EBn [cmds]

  Description:   Selects word length in asynchronous mode

    Command                              Function

      $EB0       10-bit word length enabled

      $EB1       11-bit word length enabled

                         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

                             CALLBACK ATTEMPTS

  Type:                  Configuration

  Format                 AT [cmds] #CBAn [cmds]

  Range:                 1-255

  Default:               4

  Unit:                  1 callback

  Description:           Sets the number of callback attempts allowed
                         after passwords have been exchanged between
                         modems



                              CALLBACK DELAY

  Type:                Configuration

  Format               AT [cmds] #CBDn [cmds]

  Range:               0-255

  Default:             15

  Unit:                1 second

  Description:         Sets the length of time that the modem waits
                       before calling back the remote modem

                      CALLBACK FAILED ATTEMPT DISPLAY

  Type:                   Immediate

  Format                  AT [cmds] #CBF? [cmds]

  Description:            Requests the number of failed callback
                          passwords since reset power-up. Number may be
                          stored in NVRAM using &W command

                       CALLBACK FAILED ATTEMPT RESET

  Type:                   Immediate

  Format                  AT [cmds] #CBFR [cmds]

  Description:            Resets number of failed callback passwords to
                          zero. Does not reset number stored in NVRAM
                          using &W command

                     CALLBACK INACTIVITY TIMER - LOCAL

  Type:                  Configuration

  Format                 AT [cmds] #CBIn [cmds]

  Range:                 0-255

  Default:               20

  Unit:                  1 minute

  Description:           Sets the length of time that the modem waits for
                         a command before requiring the user to reenter
                         the setup password

                              CALLBACK PARITY

  Type:          Configuration

  Format:        AT [cmds] #CBPn [cmds]

  Description:   Sets the parity for callback security messages

    Command                              Function

     #CBP0       No parity enabled

     #CBP1       Odd parity enabled

     #CBP2       Even parity enabled

                     CALLBACK SECURITY ENABLE/DISABLE

  Type:          Configuration

  Format         AT [cmds] #CBSn [cmds]

  Description:   Enables/disables local and remote callback security

    Command                              Function

     #CBS0       Callback security disabled

     #CBS1       Local and remote callback security enabled

     #CBS2       Remote callback security enabled

     #CBS3       Callback security disabled until local hangup or reset



                          CALLBACK SECURITY RESET

  Type:           Configuration

  Format          AT [cmds] #CBRn [cmds]

  Range:          0-29

  Description:    Clears the password and phone number in memory location
                  (n)

                             COMMAND RESPONSE

  Type:          Configuration

  Format:        AT [cmds] %DCn [cmds]

  Description:   Enables/disables AT command response function

    Command                              Function

      %DC0       Modem responds to AT commands

      %DC1       Modem ignores AT 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

                           ENTER SETUP PASSWORD

  Type:              Configuration

  Format             AT [cmds] #Sn [cmds]

  Range:             1-8

  Unit:              ASCII character string (case sensitive)

  Description:       Enters remote configuration setup password. Default
                     password is MTSMODEM

                         ESCAPE SEQUENCE - REMOTE

  Type:                  Immediate

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

  Description:           Initiates remote configuration mode while
                         on-line with remote modem. The remote
                         configuration escape character is defined by
                         register S13

                          SPEAKER CODEC LOOPBACK

  Type:          Configuration

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

  Description:   Provides aloopbcak from the microphone to the speaker.

  Description:   For testing and debugginh purposes only

                          STORE CALLBACK PASSWORD

  Type:            Configuration

  Format           AT [cmds] #CBNn=x [cmds]

  Range (n):       0-29

  Range (x):       6-10

  Unit (x):        ASCII character string (excluding +or -)

  Description:     Sets callback security password (x) for the memory
                   location (n)



                           STORE SETUP PASSWORD

  Type:               Configuration

  Format              AT [cmds] #S=n [cmds]

  Range:              1-8

  Unit:               ASCII character string (case sensitive)

  Description:        Stores a new remote configuration setup password.
                      Default password is MTSMODEM



                            S(STATUS) -REGISTERS

                            56K DCE LINE SPEED

  Type:                Register

  Format               AT [cmds] S38=n [cmds]

  Description:         Sets the maximum allowable 56K downstream rate
                       attempted during handshake process.

       Command                              Function

        S38=0          56K disabled

        S38=1          56K automatic speed select

        S38=2          32.0Kbps

        S38=3          34.0Kbps

        S38=4          36.0Kbps

        S38=5          38.0Kbps

        S38=6          40.0Kbps

        S38=7          42.0Kbps

        S38=8          44.0Kbps

        S38=9          46.0Kbps

        S38=10         48.0Kbps

        S38=11         50.0Kbps

        S38=12         52.0Kbps

        S38=13         54.0Kbps

        S38=14         56.0Kbps

                             56K DIGITAL LOSS

  Type:             Register

  Format:          AT [cmds] S108=n [cmds]

  Description:     Selects the 56Kbps digital loss if using the modem
                   thru a PBX line

     Command                              Function

      S108=0        -0dB digital loss; robbed bit signaling disabled

      S108=1        -3dB PBX digital loss

      S108=2        -2dB digital loss

      S108=3        -3dB digital loss

      S108=6        -6dB digital loss

      S108=7        -0dB digital loss; robbed bit signaling enabled

                            BACKSPACE CHARACTER

  Type:          Register

  Format         AT [cmds] S5=n [cmds]

  Range:         0-127

  Unit:          ASCII

  Description:   Selects a character used for backspace <BS>

            Note: A value greater than 32 will disable backspace



                              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

                       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

                             ESCAPE CHARACTER

  Type:          Register

  Format         AT [cmds] S9=n [cmds]

  Range:         1-127

  Unit:          ASCII

  Description:   Sets ASCII code for remote configuration escape
                 character



                            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] S30=n [cmds]

  Range:                 0-255

  Unit:                  1 minute

  Description:           Maximum duration of DTE and DCE inactivity
                         allowed prior to initiating hang-up process.

            Note: S30=0 disables the timer and allows indefinite
            inactivity.

                             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.

                            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.

