
MULTI-TECH SYSTEMS, INC.

MTA128ST

Card Type                    ISDN TA
Chip Set                     Unidentified
I/O Options                  Power, 25-pin DTE serial port, ISDN interface
                             (RJ-45),

                             Auxiliary interface (RJ-11)
ISDN Data Rate               128Kbps
ISDN Modulation Protocol     V.110, V.120, X.75, ML-PPP, SoftBond
Error Correction/Compression Unidentified
Data Bus                     External

[Image]

                                             CONNECTIONS

                 Function                   Label                  Function                   Label

  Power connector                           CN1     Auxiliary interface (RJ-11 connector)      CN3

  25-pin serial port                        CN2     ISDN interface (RJ-45 connector)           CN4

                              DIAGNOSTIC LEDS

  LED        Color           Status                  Condition

   TD     Unidentified      Blinking         Data is being transmitted

   TD     Unidentified        Off          Data is not being transmitted

   RD     Unidentified      Blinking          Data is being received

   RD     Unidentified        Off           Data is not being received

   LS     Unidentified         On           Link with central office is
                                                       good

   LS     Unidentified      Blinking        SPIDS have not been verifies
                             (slow)             with central office

   LS     Unidentified      Blinking      One SPID has been verified with
                             (fast)               central office

   LS     Unidentified        Off           Link with central office is
                                                      broken

   B1     Unidentified         On            Active data connection on
                                                    B-channel 1

   B1     Unidentified      Blinking        Active analog connection on
                             (slow)                 B-channel 1

   B1     Unidentified      Blinking         Connection is being made
                             (fast)

   B1     Unidentified        Off            B-channel 1 connection is
                                                      broken

   B2     Unidentified         On            Active data connection on
                                                    B-channel 2

   B2     Unidentified      Blinking        Active analog connection on
                             (slow)                 B-channel 2

   B2     Unidentified      Blinking         Connection is being made
                             (fast)

   B2     Unidentified        Off            B-channel 2 connection is
                                                      broken

   TR     Unidentified         On             Data terminal is ready

   TR     Unidentified        Off           Data terminal is not ready

   OH     Unidentified         On               Device is off-hook

   OH     Unidentified        Off                Device is on-hook

  128     Unidentified         On               B-channels have been
                                             multiplexed into a single
                                                   128Kbps link

  128     Unidentified        Off             B-channels have not been
                                             multiplexed into a single
                                                   128Kbps link

  Note: LED 128 also indicates what protocol is being used in conjunction
  with P1, and P2

                            DATA PROTOCOL LEDS

      Protocol              128               P1                P2

        V.110               Off               Off               Off

        V.120               Off               Off               On

  X.75 (1 channel)          Off               On                Off

  X.75 (2 channel)          On                On                Off

   PPP (1 channel)          Off               On                On

  MLPPP (2 channel)         On                On                On

  Note: P1 and P2 LEDs blink to indicate active data compression

                   SUPPORTED COMMAND SET

                     Basic AT Commands

  AT, +++

  A, E, H, Q, V

  &S, &Z

                        S Registers

  S0, S1, S2, S3, S4, S5, S25



  Note: See MHI Help File for full command documentation.

                         Proprietary AT Command Set

                            COMMUNICATIONS MODE

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Description:   Selects communications mode.

  Note: &M1 is not currently supported by TA

    Command                                Mode

      &M0        Asynchronous mode

      &M1        Synchronous mode

                             DATA COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] &Kn [cmds]

  Description:   Enables/disables data compression

    Command                              Function

      &K0        Data compression disabled

      &K1        Data compression enabled

                         DATA CARRIER DETECT (DCD)

  Type:            Configuration

  Format:          AT [cmds] &Cn [cmds]

  Description:     Selects whether the DCD option is enabled or disabled

     Command                             Function

       &C0         DCD enabled

       &C1         DCD enabled after carrier signal detected

       &C2         DCD drops after disconnect for a time specified by
                   register S10

                                     DATA TERMINAL READY (DTR)

  Type:              Configuration

  Format:            AT [cmds] &Dn [cmds]

  Description:       Selects modem response to DTR

      Command                                            Mode

        &D0           Ignore transition of DTR status

        &D1           Switch to command mode if DTR is low

        &D2           Abort connection if DTR is low, return to command mode and disable
                      auto-answer. If device is off-line, it will neither answer nor dial when DTR
                      is low

        &D3           Abort connection and reinitialize on low DTR

                                   DIAL

  Type:                  Immediate

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

  Description:           Dials ISDN 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

          DS=n           Dial stored telephone number n

                          FACTORY DEFAULT PROFILE

  Type:             Configuration

  Format:           AT [cmds] &F [cmds]

  Description:      Sets values in active profile to values found in the
                    default profile

     Command                              Function

       &F0          Load quick setup profile 0 (modem standard)

       &F1          Load quick setup profile 1 (V.110)

       &F2          Load quick setup profile 2 (V.120)

       &F3          Load quick setup profile 3 (X.75)

       &F4          Load quick setup profile 4 (MLPPP)

                               FLOW CONTROL

  Type:               Configuration

  Format:             AT [cmds] &En [cmds]

  Description:        Enables flow control options

      Command                              Function

        &E3           Flow control disabled

        &E4           RTS to CTS flow control enabled

        &E5           XON/XOFF flow control enabled

        &E6           When pacing is active, XON/XOFF signals are
                      responded to and discarded by TA

        &E7           When pacing is active, XON/XOFF signals are passed
                      through local modem

        &E12          XON/XOFF pacing disabled

        &E13          XON/XOFF pacing enabled

                                  ON-LINE

  Type:           Immediate

  Format:         AT [cmds] On [cmds]

  Description:    Controls on-line command (data transmission) state
                  options.

    Command                              Function

       O0         On-line command mode with no retraining enabled

                            LIST ACTIVE PROFILE

  Type:          Immediate

  Format:        AT [cmds] Ln [cmds]

  Description:   Lists active profile

    Command                              Function

       L5        Lists current operating parameters of TA

       L6        Lists values currently stored in the S registers

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0        Reports product ID

       I1        Reports firmware version number

       I2        MTS internal use

                                  RTS/CTS

  Type:                Configuration

  Format:              AT [cmds] &Rn [cmds]

  Description:         Selects RTS/CTS options

       Command                              Function

         &R0           CTS follows RTS in data mode; RTS is ignored in
                       command mode.

         &R1           CTS forced high, RTS is ignored.

         &R2           CTS is forced high, but drops on disconnect for a
                       time specified by register S10

                     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; result
                         codes 0 - 4 enabled.

           X1            Busy and dial tone detection disabled; result
                         codes 0 - 5 & 10 - 14, 17 - 19, 28, & 32
                         enabled.

           X2            Extended 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.

                           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           Stores all current AT commands and S-register
                      values in NVRAM

        &W1           Deletes custom settings on reset or power down.
                      Factory default profile used

                          Extended AT Command Set

                          ESCAPE SEQUENCE OPTIONS

  Type:          Configuration

  Format:        AT [cmds] %En [cmds]

  Description:   Controls escape sequence options

  Note:          %E1 or %E3 may be entered in conjunction with %E5

    Command                              Function

      %E0        Escape disabled

      %E1        +++ escape option enabled

      %E2        <BREAK> escape option enabled

      %E3        +++ and <BREAK> escape options enabled

      %E4        OK response to +++ disabled

      %E5        OK response to +++ enabled

                              SENDING METHOD

  Type:                  Configuration

  Format:                AT [cmds] %A97=n [cmds]

  Description:           Selects whether a "sending complete indication"
                         signal is sent or overlap sending is implemented

        Command                              Function

         %A97=0          En bloc sending during cal SETUP enabled

         %A97=1          Overlap sending during call SETUP enabled

                             SERIAL PORT MODE

  Type:          Configuration

  Format:        AT [cmds] %Sn [cmds]

  Description:   Selects serial port speed

    Command                              Function

      %S0         Automatic speed selection enabled

      %S1         460.8Kbs

                              Special Commands

                               CONFIGURATION

  Type:                 Configuration

  Format                AT [cmds] @CONFIG [cmds]

  Description:          Starts the internal configuration utility.
                        Command must be entered in terminal mode

                           DATA DIRECTORY NUMBER

  Type:          Configuration

  Format:        AT [cmds] !N1=n [cmds]

  Range:         0  24

  Unit:          0 - 9, *, #

  Description:   Sets the directory number (DN) for the data channel

                                 DATA SPID

  Type:               Configuration

  Format:             AT [cmds] !C6=n [cmds]

  Range:              0  20

  Unit:               ASCII

  Description:        Specifies the data service profile identifier
                      assigned by the ISDN provider

                                 DATA TEI

  Type:                  Configuration

  Format:                AT [cmds] !D3=n [cmds]

  Range:                 0 - 63, 240, 241

  Unit:                  ASCII

  Description:           Sets the terminal endpoint identifier for the
                         data channel. 240 (default) sets to automatic.
                         241 disables

                       DISPLAY NETWORK CONFIGURATION

  Type:            Immediate

  Format:          AT [cmds] !L [cmds]

  Description:     Displays the current DN, SPID, TEI, data protocol; and
                   switch type

                        EMBEDDED PROTOCOL ANALYZER

  Type:          Configuration

  Format:        AT [cmds] >Dn [cmds]

  Description:   Analyzes various protocols

    Command                              Function

      >D0        Display B-channel traffic, decoded as V.120

      >D1        Display D-channel traffic, decoding layers 2 & 3

      >D2        Display D-channel traffic, decoding layers 2

      >D3        Display D-channel traffic, decoding layers 3

      >D4        Display B-channel traffic, decoded as X.75

      >D98       Embedded protocol analyzer disabled

      >D99       Embedded protocol analyzer enabled

                          ISDN D-CHANNEL PROTOCOL

  Type:          Configuration

  Format:        AT [cmds] !C0=n [cmds]

  Description:   Selects network switch type

    Command                              Function

     !C0=0       AT&T 5ESS

     !C0=1       Northern Telecom DMS-100

     !C0=2       Euro-ISDN NET3

     !C0=3       1TR6

     !C0=4       INS64

     !C0=5       US NI-1

     !C0=6       VN4

                          PERSISTANT DTR DIALING

  Type:          Configuration

  Format:        AT [cmds] $Dn [cmds]

  Description:   Enables/disables persistent DTR dialing

    Command                              Function

      $D0        PDD disabled

      $D1        PDD enabled

                            POWER UP DATA BITS

  Type:          Configuration

  Format         AT [cmds] @P4=n [cmds]

  Description:   Sets the data bits at power up

    Command                              Function

     @P4=7       7 bits

     @P4=8       8 bits

                              POWER UP PARITY

  Type:          Configuration

  Format         AT [cmds] @P3=n [cmds]

  Description:   Sets the parity at power up

    Command                              Function

     @P3=0       Odd parity enabled

     @P3=1       Even parity enabled

     @P3=2       Mark parity enabled

     @P3=3       Space parity enabled

     @P3=4       Parity disabled

                              POWER UP SPEED

  Type:                  Configuration

  Format                 AT [cmds] $SBn [cmds]

  Description:           Sets the serial speed negotiated when the TA
                         powers up. If the speed is set to 460.8Kbps than
                         the %S1 mode is initialized. %S1 mode is used
                         for any other rate.

        Command                              Function

          $SB3           300bps

         $SB12           1200bps

         $SB24           2400bps

         $SB48           4800bps

         $SB96           9600bps

         $SB192          19.2Kbps

         $SB384          38.4Kbps

         $SB576          57.6Kbps

        $SB1152          115.2Kbps

        $SB2304          230.4Kbps

        $SB3608          460.8Kbps

                            POWER UP STOP BITS

  Type:          Configuration

  Format         AT [cmds] @P6=n [cmds]

  Description:   Sets the data bits at power up

    Command                              Function

     @P6=1       1 stop bit

     @P6=2       2 stop bits

                          RATE ADAPTION PROTOCOL

  Type:            Configuration

  Format:          AT [cmds] !Z=n [cmds]

  Description:     Select rate adaption protocol used to communicate with
                   another TA

     Command                              Function

      !Z=5         V.120

      !Z=6         V.110

      !Z=9         ML-PPP

      !Z=12        X.75

                               RECEIVE GAIN

  Type:                Configuration

  Format:              AT [cmds] !RXGn [cmds]

  Range:               0 - 10

  Unit:                ASCII

  Description:         Controls the speaker level of an analog telephone
                       device connected to the AUX port

                               TRANSMIT GAIN

  Type:                  Configuration

  Format:                AT [cmds] !TXGn [cmds]

  Range:                 0 - 4

  Unit:                  ASCII

  Description:           Controls microphone amplification of an analog
                         telephone device connected to the AUX port

  Note: Do not adjust the gain unless it is absolutely necessary. It is
  very high at non-zero levels.

                          VOICE DIRECTORY NUMBER

  Type:          Configuration

  Format:        AT [cmds] *!N1=n [cmds]

  Range:         0 - 24

  Unit:          0 - 9, *, #

  Description:   Sets the directory number (DN) for the voice channel

                                VOICE SPID

  Type:               Configuration

  Format:             AT [cmds] *!C6=n [cmds]

  Range:              0 - 20

  Unit:               ASCII

  Description:        Specifies the voice service profile identifier
                      assigned by the ISDN provider

                                 VOICE TEI

  Type:                  Configuration

  Format:                AT [cmds] *!D3=n [cmds]

  Range:                 0 - 63, 240, 241

  Unit:                  ASCII

  Description:           Sets the terminal endpoint identifier for the
                         voice channel. 240 (default) sets to automatic.
                         241 disables

                               XOFF SENDING

  Type:                  Configuration

  Format:                AT [cmds] #Xn [cmds]

  Description:           Determines whether single or multiple XOFF
                         characters are sent

        Command                              Function

          #X0            One XOFF character is sent until the buffer
                         reaches the XON level

          #X1            Multiple XOFF characters are sent for every
                         character received after buffer reaches full
                         level.

                            S(Status) Registers

                          AUTO-PROTOCOL DETECTION

  Type:           Register

  Format          AT [cmds] S52=n [cmds]

  Description:    Enables/disables mechanism for identifying type of
                  protocol

    Command                              Function

     S52=0        Auto-protocol detection disabled

     S52=1        Auto-protocol detection enabled

                              CALLER LINE ID

  Type:               Register

  Format              AT [cmds] S50=n [cmds]

  Description:        Enables/disables mechanism for identifying the two
                      endpoints of a connection

      Command                              Function

       S50=0          CLI feature disabled

       S50=1          CLI feature enabled

                        CARRIER LOSS RESPONSE TIME

  Type:                   Register

  Format                  AT [cmds] S10=n [cmds]

  Range:                  0-255

  Unit:                   .05 second

  Description:            Maximum time allowed by the modem after losing
                          the carrier signal and prior to initiating
                          hang-up process.

                              ESCAPE SEQUENCE

  Type:          Register

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

  Range:         0-255

  Unit:          .1sec

  Description:   Maximum time allowed by the modem in an escape sequence

                            MAXIMUM FRAME SIZE

  Type:          Register

  Format:        AT [cmds] S53=n [cmds]

  Range:         0-2048

  Unit:          ASCII

  Description:   Sets the maximum frame size of data frames in X.75 mode

                            NO CARRIER TIME-OUT

  Type:                  Register

  Format                 AT [cmds] S7=n [cmds]

  Range:                 0-255

  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.
                         Default=45

