
ELSA, INC.

MICROLINK ISDN/TL PRO

Card Type                     ISDN TA
Chip Set                      Unidentified
I/O Options                   Power connector power switch, DTE port, ISDN
                              interface (RJ-11)
ISDN Data Rate                230.4Kbps
ISDN Modulation Protocol      V.110, V.120, X.75, PPP, T - online
Error Correction/Compression  MNP5, V.42bis
Data Bus                      External

[Image]

                                CONNECTIONS

        Function           Label             Function            Label

  AC power connector        CN1       ISDN interface (RJ-11       CN3
                                      connector)

  25-pin DTE serial         CN2       Power switch                SW1
  port

                             DIAGNOSTIC LED(S)

   LED          Color          Status                Condition

   PWR       Unidentified        On                 Power is on

   PWR       Unidentified       Off                Power is off

   STS       Unidentified        On              ISDN link is good

   STS       Unidentified     Blinking        ISDN link negotiation in
                                                     progress

   STS       Unidentified       Off             ISDN link is broken

   LNE       Unidentified        On       Connection is being established

   LNE       Unidentified     Blinking     Incoming call is received, but
                               (slow)         incompatible with unit

   LNE       Unidentified     Blinking    Incoming call not yet accepted
                               (fast)

   LNE       Unidentified       Off            Connection is broken

    TX       Unidentified        On           MICROLINK ISDN/TL PRO is
                                           receiving data from remote or
                                                        DTE

    TX       Unidentified       Off         MICROLINK ISDN/TL PRO is not
                                           receiving data from remote or
                                                        DTE

    RX       Unidentified        On           MICROLINK ISDN/TL PRO is
                                           transmitting data from remote
                                                      or DTE

    RX       Unidentified       Off          MICROLINK ISDN/TL PRO not
                                           transmitting data from remote
                                                      or DTE

   DTR       Unidentified        On         Terminal/computer ready for
                                                     operation

       DTR   Unidentified       Off       Terminal/computer not ready for
                                                     operation

   DSR       Unidentified        On       MICROLINK ISDN/TL PRO ready for
                                                     operation

   DSR       Unidentified       Off       MICROLINK ISDN/TL PRO ready for
                                                     operation

   RTS       Unidentified        On          Sending device is enabled

   RTS       Unidentified       Off         Sending device is disabled

   CTS       Unidentified        On        MICROLINK ISDN/TL PRO ready to
                                                     send data

   CTS       Unidentified       Off       MICROLINK ISDN/TL PRO not ready
                                                   to send data

   DCD           Red             On        V.110, V.100 or PPP connection
                                                    established

   DCD          Green            On          V.120, X.75, MNP5, V.42bis
                                            error correction connection
                                                    established

   DCD          Orange           On          Channel building enabled

   DCD           N/A            Off         ISDN modulation protocol not
                                                    established

   TST       Unidentified        On           MICROLINK ISDN/TL PRO is
                                            performing a self diagnostic
                                                       test

   TST       Unidentified       Off         MICROLINK ISDN/TL PRO is not
                                            performing a self diagnostic
                                                       test

                   SUPPORTED COMMAND SET

                     Basic AT Commands

  AT, A/

  A, E, V, Z

  &F, &V, &W

                   Extended AT Commands

  \T, \X

                        S Registers

  S0, S1, S2, S3, S4, S5, S12, S30



  Note: See MHI Help File for full command documentation.

                         Proprietary AT Command Set

                             CHANNEL BUNDLING

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Description:   Selects channel bundling mode

    Command                                Mode

      &N0        Channel bundling disabled

      &N1        Channel bundling enabled

                            COMMUNICATIONS MODE

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Description:   Selects communications mode

    Command                                Mode

      &M0        Asynchronous mode

      &M1        Synchronous connect mode

      &M2        Synchronous connect mode and set DTR high.

                         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 dropped during disconnection

                           DATA SET READY (DSR)

  Type:          Configuration

  Format:        AT [cmds] &Sn [cmds]

  Description:   Selects DSR options

    Command                              Function

      &S0        DSR forced high

      &S1        DSR indicates B-channel switched through

                                     DATA TERMINAL READY (DTR)

  Type:                     Configuration

  Format:                   AT [cmds] &Dn [cmds]

  Description:              Selects modem response to DTR

   Command           Command State         Connection Establishment        Existing Connection

     &D1        No effect                 Connection establishment     ISDN terminal adapter
                                          is aborted                   shifts to command state

     &D2        Existing condition        Connection establishment     ISDN terminal adapter
                terminated; stored        is aborted                   shifts to command state;
                digits are cleared                                     connection terminated

     &D3        Existing condition        Connection establishment     and ISDN terminal adapter
                terminated; stored        is aborted and ISDN          shifts to command state;
                digits are cleared and    terminal adapter is          ISDN terminal adapter is
                ISDN terminal adapter     reinitialized                reinitialized
                is reinitialized

                                   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

      DS=n, D/n         Dial stored telephone number n

        DS, D/          Dial stored telephone number 0

          DN            Establish a modem connection

          DI            Establish a ISDN connection

          D*            Phone number component for controlling PBX
                        systems

          D#            1TR6 protocol: Dialing code for external calls
                        (valid for some ISDN branch exchanges)

                        DSS1 protocol: Sending complete (additional
                        information required in some countries)

          D;            Store digits preceding semicolon in NVRAM and
                        dial them when an ATO command is executed without
                        a data connection

                               HOOK CONTROL

  Type:          Immediate

  Format:        AT [cmds] Hn [cmds]

  Description:   Selects whether the modem is on-hook or off-hook

    Command                              Function

       H0        Modem commanded to go on-hook (hang-up)

                                 LINE TYPE

  Type:          Configuration

  Format:        AT [cmds] &Ln [cmds]

  Description:   Selects line type

    Command                             Line Type

      &L0        Switched line (PSTN/Dial-up)

      &L1        Group 0 leased-line. Manual connection

      &L2        Group 0 leased-line. Automatic connection

                                  ON-LINE

  Type:           Immediate

  Format:         AT [cmds] On [cmds]

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

            Note: The O command must be placed at the end of the command
            string.

     Command                             Function

       O0         On-line command mode enabled

                   REACTION TO BUSY LINE/CONNECT MESSAGE

  Type:               Configuration

  Format:             AT [cmds] Xn [cmds]

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

      Command                              Function

         X0           Busy line reported with NO CARRIER

         X1           Busy line reported with NO CARRIER

         X2           Busy line reported with NO CARRIER

         X3           Busy line reported with BUSY

         X4           Busy line reported with BUSY

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0        Reports model number in nnn format

       I1        Reports ROM checksum

       I2        Tests and reports ROM checksum

       I3        Reports firmware version number and release date

       I4        Reports current parameter settings

       I5        Reports serial number

       I6        Reports product name and hardware release

       I7        Reports plug and play ID text

                               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 from ISDN terminal adapter enabled

       Q1        Result code sending from ISDN terminal adapter disabled

       Q2        Result code sending in answer mode disabled

                                  RTS/CTS

  Type:          Configuration

  Format:        AT [cmds] &Rn [cmds]

  Description:   Selects RTS/CTS options

    Command                              Function

      &R0        CTS follows RTS

      &R1        CTS forced high, RTS is ignored.

                               STORE NUMBERS

  Type:                Configuration

  Format:              AT [cmds] &Zm=n

  Description:         Writes selected ISDN numbers n into the
                       non-volatile memory at location m (0-9)

            Note: Telephone numbers can include up to 36 characters.

                          Extended AT Command Set

                        BIT RATE (POST CONNECTION)

  Type:          Configuration

  Format:        AT [cmds] \Jn [cmds]

  Description:   Determines fixed or variable bit rate

    Command                              Function

      \J0        Computer line bit rate remains unchanged

      \J1        DTE rate matches DCE rate

                     BIT RATE ADAPTION IN ANSWER MODE

  Type:                  Configuration

  Format:                AT [cmds] %Ln [cmds]

  Description:           Determines whether V.110 mode line bit rate is
                         adapted to the bit rate of the remote system

        Command                              Function

          %L0            Bit rate is adapted to remote system

          %L1            Bit rate is adapted to remote system

          %L2            Bit rate is not adapted; connection is
                         terminated

          %L3            Bit rate is adapted to remote system

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Description:   Selects data compression

    Command                              Function

      %C0        Data compression disabled

      %C1        V.42bis enabled

      %C2        V.42bis enabled

      %C3        V.42bis enabled

                               CONNECT MODE

  Type:                  Configuration

  Format:                AT [cmds] \Nn [cmds]

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

        Command                              Function

          \N0            V.110 normal mode enabled

          \N1            V.110 direct mode enabled

          \N2            X.75 error correction mode enabled. Connection
                         is aborted if modem does not support X.75

          \N3            X.75 error correction mode enabled. Modem
                         fallback to V.110 if modem does not support X.75

          \N4            V.120 error correction mode enabled. Connection
                         is aborted if modem does not support V.120

          \N5            V.120 error correction mode enabled. Modem
                         fallback to V.110 if modem does not support
                         V.120

          \N6            V.120 or X.75 error correction mode enabled for
                         incoming calls. Outgoing calls are performed
                         with X.75 (Europe) or V.120 (America)

          \N7            V.120 or X.75 error correction mode enabled for
                         incoming calls. Outgoing calls are performed
                         with X.75 (Europe) or V.120 (America). Modem
                         fallback to V.110 if connection cannot be
                         established

          \N8            German T-Online service error correction mode
                         enabled. VT-100 pages may be displayed with a
                         VT-100 compatible terminal

          \N9            German T-Online service error correction mode
                         enabled. Btx and KIT graphics pages may be
                         displayed with Btx or KIT decoder

          \N10           HDLC transparent mode enabled (PPP conversion
                         required)

                              DSR/CTS CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Dn [cmds]

  Description:   Controls DSR and CTS lines

    Command                              Function

      \D0        DSR and CTS forced high

      \D1        DSR indicates B-channel switched through, CTS forced
                 high

      \D2        DSR forced high, CTS follows DCD

      \D3        DSR indicates B-channel switched through, CTS follows
                 DCD

                     ERROR CORRECTION CONNECT MESSAGES

  Type:             Configuration

  Format:           AT [cmds] \Vn [cmds]

  Description:      Determines the comprehensiveness of error correction
                    CONNECT messages

     Command                              Function

       \V0          Extended result codes disabled

       \V1          Identifies error corrected connections

       \V2          Identifies error corrected connections and types

       \V8          Comprehensive CONNECT messages

                              FIRMWARE UPLOAD

  Type:                   Immediate

  Format:                 AT [cmds] UPX [cmds]

  Description:            Readies device to receive firmware upload in
                          flash ROM at transfer rate last used, up to
                          57.6Kbps

                             FIRMWARE VERSION

  Type:          Immediate

  Format:        AT [cmds] %V [cmds]

  Description:   Displays firmware version of the ISDN TA on the monitor

                             FLOW CONTROL TYPE

  Type:                Configuration

  Format:              AT [cmds] \Qn [cmds]

  Description:         Sets type of flow control used by TA

       Command                              Function

         \Q0           Flow control disabled

         \Q1           Bi-directional XON/XOFF flow control enabled

         \Q2           CTS flow control by DCE enabled

         \Q3           Bi-directional RTS/CTS flow control enabled

         \Q4           Unidirectional XON/XOFF flow control by DCE
                       enabled

         \Q5           CTS flow control by DCE enabled. CTS low until
                       connection established

         \Q6           Bi-directional RTS/CTS flow control enabled. CTS
                       low until connection established

                           ISDN BIT RATE (V.110)

  Type:          Configuration

  Format:        AT [cmds] %Bn [cmds]

  Description:   Selects ISDN bit rate in V.110 mode

    Command                              Function

     %B1200      1200bps

     %B2400      2400bps

     %B4800      4800bps

     %B9600      9600bps

    %B19200      19.2Kbps

    %B38400      38.4Kbps

    %B48000      48.0Kbps

    %B56000      56.0Kbps

    %B64000      64.0Kbps

                     ISDN BIT RATE (V.120, X.75, HDLC)

  Type:          Configuration

  Format:        AT [cmds] %Sn [cmds]

  Description:   Selects ISDN bit rate in V.110 mode

    Command                              Function

      %S0        64Kbps

      %S1        56Kbps

                               LINE BIT RATE

  Type:          Configuration

  Format:        AT [cmds] %Gn [cmds]

  Description:   Selects line bit rate control

    Command                              Function

      %G0        Line bit rate determined by serial port rate

      %G1        Line bit rate set by %B

                         PPP ASYNC/SYNC CONVERSION

  Type:                Configuration

  Format:              AT [cmds] %Pn [cmds]

  Description:         Enables/disables asynchronous/synchronous
                       conversion for point-to-point protocol

       Command                              Function

         %P0           Asynchronous/synchronous conversion for
                       point-to-point protocol disabled

         %P1           Asynchronous/synchronous conversion for
                       point-to-point protocol enabled

                         REGISTER CONTENT DISPLAY

  Type:          Configuration

  Format:        AT [cmds] %Sn [cmds]

  Description:   Selects number of registers displayed per line

    Command                              Function

      %R0        Display two registers per line

      %R1        Display one register per line

                               STORE NUMBERS

  Type:                 Configuration

  Format:               AT [cmds] \Pmn [cmds]

  Range:                m = 0-9

  Description:          Up to ten ISDN numbers can be stored in NVRAM.
                        Numbers n may have up to 36 characters

                              STORED NUMBERS

  Type:          Immediate

  Format:        AT [cmds] \F [cmds]

  Description:   Displays ISDN numbers stored with the /P or &Z commands

                              Special Commands

                           AUTOMATIC DTR DIALING

  Type:          Configuration

  Format:        AT [cmds] $Dn [cmds]

  Description:   Enables/disables automatic DTR dialing

    Command                              Function

      $D0        DTR dialing disabled

      $D1        DTR dialing enabled

                                 DUMB MODE

  Type:          Configuration

  Format:        AT [cmds] -Hn [cmds]

  Description:   Suppresses message echoing

    Command                              Function

      -H0        Normal operation

      -H1        Dumb mode

                      EXTENDED CONFIGURATION PROFILE

  Type:                  Configuration

  Format:                AT [cmds] *Wn [cmds]

  Description:           Saves extended configuration profile

        Command                              Function

          *W0            Saves extended configuration profile 0 to NVRAM
                         and values in registers, S2, S3, S4, S5 & S12

          *W1            Saves extended configuration profile 1 to NVRAM
                         and values in registers, S2, S3, S4, S5 & S12

                          INVALID ESCAPE MESSAGES

  Type:          Configuration

  Format:        AT [cmds] *Qn [cmds]

  Description:   Enables/disables CONNECT message after invalid escape

    Command                              Function

      *Q0        CONNECT message after invalid escape enabled

      *Q1        CONNECT message after invalid escape disabled

                         SET/DISPLAY ACCEPTED MSN

  Type:          Configuration

  Format:        AT [cmds] +IMSN(n, ?)=(s) [cmds]

  Range:         n=0,1

  Description:   Limits acceptance to incoming calls with target MSN

    Command                              Function

    +IMSNn=s      Store MSN

    +IMSNn=       Clear MSN

     +IMSN?       Display stored MSN

                  SET/DISPLAY D CHANNEL PROTOCOL (EUROPE)

  Type:          Configuration

  Format:        AT [cmds] +IDP=(xxxx) [cmds]

  Description:   Selects D channel protocol

    Command                              Function

   +IDP=DSS1      DSS1 protocol enabled

   +IDP=1TR6      1TR6 protocol enabled

                   SET/DISPLAY D CHANNEL PROTOCOL (USA)

  Type:          Configuration

  Format:        AT [cmds] +IDP(?)=(xxxx, ?) [cmds]

  Description:   Selects D channel protocol

    Command                              Function

   +IDP=NI-1      NI-1 protocol enabled

   +IDP=AT&T      AT&T 5ESS protocol enabled

   +IDP=FV2N      Group 2 leased line protocol enabled (network side)

   +IDP=FV2U      Group 2 leased line protocol enabled (user side)

     +IDP?        Display selected protocol

     +IDP=?       Display implemented protocols

                           SET/DISPLAY EAZ DIGIT

  Type:                  Configuration

  Format:                AT [cmds] +IEAZ(?)=(n) [cmds]

  Range                  0-19, 255

  Description:           Sets the EAZ terminal selection digit.
                         Characters 0-9 will select digits 0-9, 10-19
                         will also select digits 0-9. 255 selects any
                         digit for incoming calls, 0 for outgoing calls

  Note:                  Command is valid for German 1TR6 protocol only

        Command                              Function

        +IEAZ=n          Store EAZ

        +IEAZ?           Display EAZ

                       SET/DISPLAY DIRECTORY NUMBER

  Type:                  Configuration

  Format:                AT [cmds] +IDN(n, ?)=(s) [cmds]

  Range:                 n=1,2 (B-channels), s=0-9

  Description:           Sets and displays directory numbers. Directory
                         number s can be up to 12 characters long

        Command                              Function

        +IDNn=s          Set directory number

        +IDNn=           Clear directory number

        +IDNn?           Display directory number

                              SET/DISPLAY MSN

  Type:                  Configuration

  Format:                AT [cmds] +ICLI(n, ?, /)=(s) [cmds]

  Range:                 s=0 - 9

  Description:           Determines which multiple subscriber number is
                         displayed to the remote side in outgoing calls
                         as the originator address

        Command                              Function

        +ICLI=s           Store originator MSN

        +ICLIn=           Clear originator MSN

        +ICLI=/           Clear originator MSN; suppress display to
                          remote side

         +ICLI?           Display stored originator MSN

                             SET/DISPLAY SPID

  Type:          Configuration

  Format:        AT [cmds] +ISPID(n, ?)=(s) [cmds]

  Range:         n=1,2 (B-channels)

  Description:   Sets and displays service profile ID

    Command                              Function

   +ISPIDn=s      Set service profile ID

    +ISPIDn=      Clear service profile ID

    +ISPIDn?      Display service profile ID

                   STORE NUMBERS FOR CLOSED USER GROUPS

  Type:          Configuration

  Format:        AT [cmds] +ICLD(n, ?)=(s) [cmds]

  Range:         n=1 - 3

  Description:   Restricts call acceptance to remote systems

    Command                              Function

    +ICLDn=s      Store a call number

    +ICLDn=       Clear a call number

     +ICDL?       Clear stored numbers

                         VERBOSE CONNECT MESSAGES

  Type:          Configuration

  Format:        AT [cmds] -Mn [cmds]

  Description:   Controls text of verbose CONNECT messages

    Command                              Function

      -M0        Verbose CONNECT messages dependant on AT\V

      -M1        Verbose CONNECT messages independent of AT\V



                            S(status) Registers

                          BIT-MAPPED REGISTER S14

  Format:                 AT [cmds] S14=n [cmds]

  Range:                  0-174

  Unit:                   Bit-mapped

  Description:            Controls echo, result codes and display, dial
                          mode, and answer/originate mode.

   Bit      Dec. Value                       Function

    0                0    Not used

    1                 0   Command echo disabled

                     2    Command echo enabled

    2                 0   Result codes enabled

                     4    Result codes disabled

    3                 0   Display result codes in numeric format

                     8    Display result codes in verbose format

    4                 0   Smart mode

                    16    Dumb mode

    5                 0   Bit rate detection enabled

                    32    Bit rate detection disabled

    6                 0   Polling allowed during connection establishment

                    64    Polling not allowed during connection
                          establishment

    7                 0   Answer mode enabled

                   128    Originate mode enabled

                          BIT-MAPPED REGISTER S21

  Format                   AT [cmds] S21=n [cmds]

  Range:                   0-253

  Unit:                    Bit-mapped

  Description:             Selects jack type, CTS/DCD/DSR signals, low
                           DTR action, and the long space disconnect
                           function.

   Bit       Dec. Value                       Function

   0,1                0    Not used

    2                  0   CTS follows RTS

                      4    CTS forced high

   4, 3                0   DTR signal ignored

                       8   Modem goes to command mode on low DTR

                      16   Modem disconnects on low DTR; Auto-Answer is
                           disabled.
                     24
                           Modem is initialized on low DTR

    5                  0   DCD forced high

                     32    DCD normal

   6,7                0    Not used

                          BIT-MAPPED REGISTER S22

  Format                 AT [cmds] S22=n [cmds]

  Range:                 0-255

  Unit:                  Bit-mapped

  Description:           Limits results codes

   Bit      Dec. Value                       Function

   0-3              0    Not used

  6 - 4              0   Busy line reported with NO CARRIER

                    64   Busy line reported with NO CARRIER

                    80   Busy line reported with NO CARRIER

                    96   Busy line reported with BUSY

                  112    Busy line reported with BUSY

    7               0    Not used

                          BIT-MAPPED REGISTER S27

  Format                AT [cmds] S27=n [cmds]

  Range:                0-111

  Unit:                 Bit-mapped

  Description:          Selects synchronous/asynchronous mode, and line
                        type

   Bit     Dec. Value                       Function

  1, 0              0   Asynchronous mode

                    1   Synchronous mode

                   2    Synchronous operation, DTR dialing

  2, 3              0   Switched line

                    4   Group 0 leased line, manual connection
                        established
                   8
                        Group 0 leased line, automatic connection
                        established

   4-7             0    Not used

                          BIT-MAPPED REGISTER S28

  Format                  AT [cmds] S28=n [cmds]

  Range:                  0-31

  Unit:                   Bit-mapped

  Description:            Controls V.110 rate adaption

    Bit      Dec. Value                      Function

   0, 1              0    Not used

   2, 3               0   V.110 bit rate adaptation enabled

                      4   V.110 bit rate adaptation enabled

                      8   V.110 bit rate adaptation disabled

                    12    V.110 bit rate adaptation enabled

    4-7              0    Not used

                          BIT-MAPPED REGISTER S31

  Format                 AT [cmds] S31=n [cmds]

  Unit:                  Bit-mapped

  Description:           Enables/disables DTR dialing

   Bit      Dec. Value                       Function

   0-4               0   Not used

    5                 0  DTR dialing enabled

                    32   DTR dialing disabled

   6, 7              0   Not used

                          BIT-MAPPED REGISTER S36

  Type:                  Register

  Format                 AT [cmds] S36=n [cmds]

  Description:           Selects the action of the modem if it fails to
                         connect with the error-correction protocol set
                         in &Q.

   Bit      Dec. Value                       Function

   0-3               0   Normal mode (V.110)

                     1   Direct mode (V.110)

                     2   X.75 mode

                     3   X.75; fallback to V.110 mode

                     4   V.120 mode

                     5   V.120; fallback to V.110 mode

                     6   X.75 or V.120 mode

                     7   X.75 or V.120; fallback to V.110 mode

                     8   X.75 VT-100 mode (German T-Online service)

                     9   X.75 CEPT & KIT mode (German T-Online service)

   4-6               0   Reserved

    7                 0  Channel bundling disabled

                   128   Channel bundling enabled

                          BIT-MAPPED REGISTER S37

  Type:                  Register

  Format                 AT [cmds] S37=n [cmds]

  Description:           Sets the maximum allowable ISDN line bit rate in
                         V.110 operation

   Bit      Dec. Value                       Function

   0-4              5    ISDN line bit rate at 1200bps

                    6    ISDN line bit rate at 2400bps

                    7    ISDN line bit rate at 4800bps

                    9    ISDN line bit rate at 9600bps

                   13    ISDN line bit rate at 19.2Kbps

                   21    ISDN line bit rate at 38.4Kbps

                   22    ISDN line bit rate at 48.0Kbps

                   23    ISDN line bit rate at 56.0Kbps

                   24    ISDN line bit rate at 64.0Kbps

    5               0    Reserved

    6                0   ISDN bit rate depends on serial port rate

                   64    ISDN bit rate determined by %B

    7                0   Fixed serial port rate

                  128    serial port rate adapted to ISDN line rate

                          BIT-MAPPED REGISTER S46

  Type:                   Register

  Format:              AT [cmds] S46=n [cmds]

  Description:         Selects active error correction and compression
                       protocols

      Bit        Dec. Value                    Function

      0-3                 0   Data compression disabled

                          1   V.42bis data compression enabled

                          2   V.42bis data compression enabled

                          3   V.42bis data compression enabled

      4-7                 0   Reserved

                          BIT-MAPPED REGISTER S51

  Type:                    Register

  Format                   AT [cmds] S51=n [cmds]

  Description:             Sets flow control options

   Bit      Dec. Value                       Function

   0-3                0    No handshake

                      1    Bi-directional XON/XOFF flow control enabled

                      2    Unidirectional RTS/CTS flow control enabled

                      3    Bi-directional RTS/CTS flow control enabled

                      4    Unidirectional XON/XOFF flow control by DCE
                           enabled

                      5    CTS flow control by DCE enabled. CTS low until
                           connection established

                      6    Bi-directional RTS/CTS flow control enabled.
                           CTS low until connection established

    4                  0   XON/XOFF remote passthrough disabled

                     16    XON/XOFF remote passthrough enabled

   5-7                0    Reserved

                          BIT-MAPPED REGISTER S52

  Type:                    Register

  Format                   AT [cmds] S52=n [cmds]

  Description:             Sets DSR, CTS, DCD options

   Bit      Dec. Value                        Function

   0, 1               0    DSR forced high, CTS forced high

                      1    DSR indicates B-channel switched through, CTS
                           forced high

                      2    DSR forced high, CTS follows DCD

                      3    DSR indicates B-channel switched through, CTS
                           follows DCD

   2, 3                0   DCD either forced high, or indicates existing
                           connection ( depending on S21)
                      8
                           DCD off for .5 seconds during connection

   4,5                 0   DSR forced high, CTS forced high

                     32    DSR indicates B-channel switched through, CTS
                           forced high

   6,7                 0   CTS determined by \D

                      64   CTS follows RTS

                    128    CTS follows RTS after .56 seconds

                          BIT-MAPPED REGISTER S87

  Type:                  Register

  Format                 AT [cmds] S87=n [cmds]

  Description:           Read only register. Reports current bit rate

   Bit      Dec. Value                       Function

   0-4              0    No connection established

                    4    ISDN line bit rate at 1200bps

                    6    ISDN line bit rate at 2400bps

                    7    ISDN line bit rate at 4800bps

                    9    ISDN line bit rate at 9600bps

                   13    ISDN line bit rate at 19.2Kbps

                   21    ISDN line bit rate at 38.4Kbps

                   22    ISDN line bit rate at 48.0Kbps

                   23    ISDN line bit rate at 56.0Kbps

                   24    ISDN line bit rate at 64.0Kbps

    5                0   One-channel connection

                   32    2nd ISDN connection with 128/112Kbps (2nd
                         B-channel with 56/64Kbps)

   6, 7             0    Reserved

                          BIT-MAPPED REGISTER S93

  Type:                  Register

  Format                 AT [cmds] S93=n [cmds]

  Description:           Determines serial port bit rate

   Bit      Dec. Value                       Function

   0-4              0    No connection established

                    5    Serial port bit rate at 1200bps

                    6    Serial port bit rate at 2400bps

                    7    Serial port bit rate at 4800bps

                    9    Serial port bit rate at 9600bps

                   13    Serial port bit rate at 19.2Kbps

                   21    Serial port bit rate at 38.4Kbps

                   22    Serial port bit rate at 48.0Kbps

                   23    Serial port bit rate at 56.0Kbps

                   24    Serial port bit rate at 64.0Kbps

    5               0    Reserved

   6, 7              0   Data format 8N1

                    64   Data format 7E1

                   128   Data format 7O1

                  192    Data format 7N2

                          BIT-MAPPED REGISTER S95

  Type:                  Register

  Format                 AT [cmds] S95=n [cmds]

  Description:           Determines result codes

   Bit      Dec. Value                       Function

   0-3              0    No modified CONNECT messages

                    1    Indicates error-corrected connections

                    2    Indicates error-corrected connections and error
                         correction method

                    8    Extensive CONNECT result codes

    4                0   CONNECT messages with bit rate

                   16    CONNECT messages without bit rate

    5                0   CONNECT messages after invalid escape sequence

                   32    No CONNECT messages after invalid escape
                         sequence

   6, 7              0   Result codes enabled or disabled (depending on
                         S14)
                  128
                         Result codes disabled in answer mode

                          BIT-MAPPED REGISTER S96

  Type:                    Register

  Format                   AT [cmds] S96=n [cmds]

  Description:             Sets AT command interpreter

   Bit      Dec. Value                        Function

   0,1                0    Reserved

    2                 0    Message Press any key to continue enabled

                      4    Message Press any key to continue disabled

   3,4                 0   German user interface (European default)

                       8   English user interface (US default)

                      16   Reserved

                     24    Reserved

   5,6                0    Reserved

    7                  0   Disable error message for access of invalid or
                           protected S register ( OK)
                    128
                           Enable error message for access of invalid or
                           protected S register ( ERROR)

                         BIT-MAPPED REGISTER S151

  Type:                   Register

  Format                  AT [cmds] S151=n [cmds]

  Description:            Controls ISDN D channel

   Bit      Dec. Value                       Function

    0                 0   Send error result code to network if device is
                          busy or not ready
                     1
                          Do not send error result code to network if
                          device is busy or not ready

    1                0    Incoming calls confirmed with ALERT

                     1    No ALERT for incoming calls

    2                 0   V.120: LLC (low layer capability) not signaled
                          in D-channel
                     4
                          V.110: BC (bearer capability) and LLC not
                          signaled in D-channel

                          V.120: LLC (low layer capability) signaled in
                          D-channel

                          V.110: BC (bearer capability) and LLC signaled
                          in D-channel

    3                0    Reserved

    4                 0   Incoming calls on B-channel 1 will be accepted

                    16    Incoming calls on B-channel 1 will be ignored

    5                 0   Incoming calls on B-channel 2 will be accepted

                    32    Incoming calls on B-channel 2 will be ignored

   6,7               0    Reserved

                         BIT-MAPPED REGISTER S153

  Type:                  Register

  Format                 AT [cmds] S153=n [cmds]

  Description:           Controls CONNECT/NO CARRIER message options

   Bit      Dec. Value                       Function

    0                0   Remote number is not displayed after CONNECT

                    1    Remote number is displayed after CONNECT

    1                0   Remote number is not displayed after RING

                    2    Remote number is displayed after RING

    2               0    MSN/EAZ dialed by the remote side is not
                         displayed

                    4    MSN/EAZ dialed by the remote side is displayed
                         if bit 0 and/or 1=1

   3-5              0    Reserved

    6                0   Result codes are not displayed

                   64    Result codes are displayed

    7                0   Disconnect reason not displayed

                  128    Disconnect reason reported after NO CARRIER
                         according to S154/S155

                         BIT-MAPPED REGISTER S158

  Type:                  Register

  Format                 AT [cmds] S158=n [cmds]

  Description:           Controls CONNECT/NO CARRIER message options

   Bit      Dec. Value                       Function

    0               00   No connection was established

                    01   Current/last connection on B-channel 1

                   02    Current/last connection on B-channel 2

                         BIT-MAPPED REGISTER S159

  Type:                  Register

  Format                 AT [cmds] S159=n [cmds]

  Description:           Shows current status of ISDN interface

   Bit      Dec. Value                       Function

    0                0   No power on S0 bus detected

                    1    Normal or restricted power on S0 bus

    1               0    Reserved

    2                0   S0 bus not activated

                    4    S0 bus activated

    3                0   No TEI assigned

                    8    TEI assigned

   4-7              0    Reserved

                         BIT-MAPPED REGISTER S160

  Type:                  Register (read only)

  Format                 AT [cmds] S160=n [cmds]

  Description:           Shows information about last call on ISDN
                         interface

      Value (Hex)                            Function

          00h            No incoming call

          10h            Call is currently being reported

          11h            Call accepted

          12h            Call withdrawn or answered by another device on
                         the S0 bus

          20h            Call had wrong bearer capability or service
                         indicator

          21h            Call had wrong MSN or EAZ

          30h            DTR was off, call was rejected

          31h            ISDN adapter was already connected or
                         establishing another connection

          40h            Number check not OK

          41h            Number check not OK, no number was given

                         BIT-MAPPED REGISTER S162

  Type:                  Register

  Format                 AT [cmds] S162=n [cmds]

  Description:           Selects preferred B-channel

   Bit      Dec. Value                       Function

   0,1               0   Any B-channel is used: Leased line operation: B1
                         channel is used
                     1
                         B1 channel has priority
                    2
                         B2 channel has priority

                         BIT-MAPPED REGISTER S171

  Type:                  Register

  Format                 AT [cmds] S171=n [cmds]

  Description:           Specifies details of X.75 protocol

   Bit      Dec. Value                       Function

   0-2               0   Data block size 128 bytes

                     1   Data block size 256 bytes

                     2   Data block size 512 bytes

                     3   Data block size 1024 bytes

                    4    Data block size 2048 bytes

    3               0    Reserved

    4                0   Async/sync conversion for PPP disabled

                   16    Async/sync conversion for PPP enabled

    5                0   64Kbps (Europe default)

                   32    56Kbps (US default)

   6,7               0   T.70NL header disabled

                    64   T.70NL header disabled

                   128   T.70NL header enabled. Block size reduced by 2
                         bytes
                  192
                         T.70NL header enabled. Block size extended by 2
                         bytes

                         BIT-MAPPED REGISTER S172

  Type:                  Register

  Format                 AT [cmds] S172=n [cmds]

  Description:           Specifies details of V.120 protocol

   Bit      Dec. Value                       Function

    0                0   Data block size 127 bytes

                    1    Data block size 259 bytes

   1-6              0    Reserved

    7                0   64Kbps (Europe default)

                  128    56Kbps (US default)

                         BIT-MAPPED REGISTER S173

  Type:                  Register

  Format                 AT [cmds] S173=n [cmds]

  Description:           Specifies details of V.110 protocol

   Bit      Dec. Value                       Function

    0               0    Reserved

   1-2               0   No parity, asynchronous

                     2   Odd parity, asynchronous

                     4   Even parity, asynchronous

                    6    "1" parity, asynchronous

    3                0   RTS, DCD, DSR normal operations

                    8    V.110 half duplex operation, asynchronous

    4                0   Bit rate tolerance 12.5%, asynchronous

                   16    Bit rate tolerance 25%, asynchronous

    5                0   1 stop bit, asynchronous

                   32    2 stop bit 2, asynchronous

   6-7               0   8 bits/character, asynchronous (no parity bit)

                    64   7 bits/character, asynchronous (no parity bit)

                   128   6 bits/character, asynchronous (no parity bit)

                  192    5 bits/character, asynchronous (no parity bit)

                         BIT-MAPPED REGISTER S175

  Type:                   Register

  Format                  AT [cmds] S175=n [cmds]

  Description:            Controls additional settings for channel
                          bundling

   Bit      Dec. Value                       Function

   0,1               0    Reserved

    2                 0   Static channel bundling (second B-channel
                          always active)
                     4
                          Dynamic channel bundling (second B-channel
                          active when needed)

    3                 0   Connection hold time starts when throughput
                          falls below limit
                     8
                          Connection hold time starts with each charge
                          unit

    4                 0   Secondary connection with the same number as
                          primary connection
                    16
                          Secondary connection with the same number as
                          primary connection without SPC flag

    5                 0   Supplied number not required for identification
                          of second B-channel
                    32
                          Supplied number required for identification of
                          second B-channel

    6                 0   CONNECT reported after primary connection
                          establishment
                    64
                          CONNECT reported after secondary connection
                          establishment

    7                 0   Normal DSR function

                   128    DSR off when secondary connection established

                           CALL INDICATION DELAY

  Type:          Register

  Format         AT [cmds] S152=n [cmds]

  Range:         0-50

  Unit:          10ms

  Description:   Sets the delay for indication of incoming calls

                        CHANNEL BUNDLING HOLD TIME

  Type                   Register

  Format                 AT [cmds] S178=n [cmds]

  Range                  0-255 x 10

  Unit                   10sec

  Description            Defines amount of time the second B channel is
                         held after the throughput falls below the limit
                         set in register S176. Register used only if bit
                         2 of Register S175 is set.

                   CHANNEL BUNDLING THROUGHPUT AVERAGING

  Type                  Register

  Format                AT [cmds] S177=n [cmds]

  Range                 0-32

  Unit                  1sec

  Description           Defines time over which the average data
                        throughput is calculated in order to smooth
                        fluctuations throughout. Default=0

                     CHANNEL BUNDLING THROUGHPUT LIMIT

  Type                  Register

  Format                AT [cmds] S176=n [cmds]

  Range                 0-255 x 100

  Unit                  100 bytes/sec

  Description           Defines data throughput limit that must be
                        exceeded for second B-channel to be established.
                        Register used only if bit 2 of Register S175 is
                        set.

                      CHARGE UNITS - CURRENT (EUROPE)

  Type                Register

  Format              AT [cmds] S191=n [cmds]

  Range               10

  Unit                ASCII

  Description         Contains number of charge units or total charge for
                      current or last connection

                       CHARGE UNITS - TOTAL (EUROPE)

  Type                 Register

  Format               AT [cmds] S192=n [cmds]

  Range                10

  Unit                 ASCII

  Description          Contains total number of charge units or total
                       charge for all previous connections.

                       0 resets register

                               CHARGED UNITS

  Type                   Register

  Format                 AT [cmds] S167=n [cmds]

  Range                  0-255

  Unit                   10

  Description            Sets the maximum number of charged units which
                         my be used within a certain number of days set
                         in register S168

                     DATA PACKET REPITITIONS RECEIVED

  Type:                 Register

  Format                AT [cmds] S156=n [cmds]

  Range:                0-255

  Description:          Shows the ratio of repetitions per 250 data
                        packets received on the control channel

                       DATA PACKET REPITITIONS SENT

  Type:                Register

  Format               AT [cmds] S157=n [cmds]

  Range:               0-255

  Description:         Shows the ratio of repetitions per 250 data
                       packets sent on the control channel

                          ERROR CODES (EURO-ISDN)

  Type:          Register (read only)

  Format         AT [cmds] S165=n [cmds]

  Description:   Displays detailed error codes

                              ERROR LOCATION

  Type:                Register (read only)

  Format               AT [cmds] S154=n [cmds]

  Description:         Error code indicates location where the error
                       occurred. Error codes unidentified

                               ERROR REASON

  Type:            Register (read only)

  Format           AT [cmds] S155=n [cmds]

  Description:     Error code indicates reason for failure. Error codes
                   unidentified

                             LAST CALL MSN/EAZ

  Type                   Register

  Format                 AT [cmds] S193=n [cmds]

  Range                  10

  Unit                   ASCII

  Description            Contains the multiple subscriber number (MSN,
                         with DSS1 protocol) or the EAZ (terminal
                         selection digit, with 1TR6 protocol) dialed by
                         remote side for last incoming call. 0 clears
                         register

                       LEASED LINE CONNECTION DELAY

  Type:                  Register

  Format                 AT [cmds] S40=n [cmds]

  Range:                 5-255

  Unit:                  10 secondS

  Description:           Controls the amount of time before the ISDN
                         terminal adapter automatically establishes a
                         group 0 leased line connection

                          REMAINING CHARGED UNITS

  Type                   Register

  Format                 AT [cmds] S169=n [cmds]

  Range                  0-255

  Unit                   10

  Description            Holds the number of charged units which can
                         still be used in the cost monitoring period. 0
                         disables

                           REMAINING TIME PERIOD

  Type                   Register

  Format                 AT [cmds] S170=n [cmds]

  Range                  0-255

  Description            Holds the number of days remaining until the
                         number of charged units is reset to the maximum
                         limit set in S167.

                               REMOTE NUMBER

  Type               Register

  Format             AT [cmds] S190=n [cmds]

  Range              36

  Unit               ASCII

  Description        Contains ISDN number of current or last remote
                     system. 0 resets register

                             SERVICE INDICATOR

  Type:                   Register (read only)

  Format                  AT [cmds] S163=n [cmds]

  Description:            Shows service indicator of last incoming call.
                          007 indicates a bit rate adaptation to 56Kbps.
                          Otherwise, the data transfer occurred at
                          64Kbps.

                             SERVICE INDICATOR

  Type:                   Register (read only)

  Format                  AT [cmds] S164=n [cmds]

  Description:            Shows service indicator of last incoming call.
                          169 indicates a bit rate adaptation to 56Kbps.
                          Otherwise, the data transfer occurred at
                          64Kbps.

                      TIME PERIOD FOR COST MONITORING

  Type               Register

  Format             AT [cmds] S168=n [cmds]

  Range              0-255

  Description        Sets the maximum number of days the charged units
                     set in S167 may be used

