
NETGEAR, INC.

XM128 ISDN

Card Type                         ISDN Modem
Chip Set                          Unidentified
I/O Options                       25-pin serial port, ISDN interface via
                                  RJ-45 connector (U or S/T), power

                                  analog telephone line out (2)
ISDN Data Rate                    128Kbps
ISDN Modulation Protocol          PPP, MLPPP, BACP, X.75, V.110, V.120
Error Correction/Compression      V.42bis
Data Bus                          External

[Image]

                                CONNECTIONS

         Function           Label             Function             Label

  Power                         CN1       Telephone line 1          CN4

  25-pin serial port            CN2       Telephone line 2          CN5

  ISDN interface (RJ-45)        CN3       Power switch              SW1





                                         DIAGNOSTIC LED(S)

      LED           Color               Status                           Condition

         PWR          Yellow              On                            Power is on

         PWR          Yellow             Off                           Power is off

      DCH              Green              On                 ISDN link on D channel is active

      DCH              Green           Blinking                D channel connection is being
                                                                        established

      DCH              Green             Off                ISDN link on D channel is inactive

      B1               Green              On              Connection is established on B-channel 1

      B1               Green             Off                Connection is broken on B-channel 1

      B2               Green              On               Connection is established B-channel 2

      B2               Green             Off                Connection is broken on B-channel 2

      AA               Green              On                 Automatic answer mode is enabled

      AA               Green             Off                 Automatic answer mode is disabled

      CP               Green              On              Data compression is active on B-channel

      CP               Green           Blinking                  Incoming call is ringing

      CP               Green             Off                 Data compression is not active on
                                                                         B-channel

      DTR          Green            On               Terminal/computer ready for operation

         DTR       Green           Off             Terminal/computer not ready for operation

      DSR          Green            On                   Modem is ready for operations

         DSR       Green           Off                 Modem is not ready for operations

      CTS          Green            On               Modem ready to receive data from DTE

      CTS          Green           Off            Modem is not ready to receive data from DTE

      RTS          Green            On                     Sending device is enabled

      RTS          Green           Off                    Sending device is disabled

      TD           Green            On               DTE is transmitting data to the modem

      TD           Green           Off             DTE is not ransmitting data to the modem

         RD        Green            On               DTE is receiving data from the modem

         RD        Green           Off            DTE is not receiving data from to the modem

         PH1       Green            On                   Telephone line 1 is off-hook

         PH1       Green           Off                    Telephone line 1 is on-hook

         PH2       Green            On                   Telephone line 2 is off-hook

         PH2       Green           Off                    Telephone line 2 is on-hook

                   SUPPORTED COMMAND SET

                     Basic AT Commands

  AT, +++, A/

  A, E, L, M, Q, V

  &C, &F, &Z

                        S Registers

  S0, S1, S2, S3, S4, S5, S7, S8, S10, S12, S25



  Note: See MHI Help File for full command documentation.

                         Proprietary AT Command Set

                             ANALOG PHONE PORT

  Type:          Configuration

  Format:        AT [cmds] &Ln [cmds]

  Description:   Selects analog port during call answering

    Command                             Line Type

      &L0        Phone port 1

      &L1        Phone port 2





                            B-CHANNEL DATA RATE

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Description:   Selects data rate on B-channel

    Command                              Function

      &E0         64Kbps

      &E1         56Kbps

                             BUNDLE SELECTION

  Type:          Configuration

  Format:        AT [cmds] &Jn [cmds]

  Description:   Selects bundle options

    Command                             Jack Type

     ? &J0       Bundle connection is disabed

      &J1        Bundle connection is enabled in answer mode only

      &J2        Bundle connection is enabled in call mode only

      &J3        Bundle connection enabled in both directions

                          CONFIGURATION PROFILES

  Type:          Immediate

  Format:        AT [cmds] &V [cmds]

  Description:   Views profile settings

    Command                              Function

      &V0        View current active settings

      &V1        View profile 1

      &V2        View profile 2

      &V3        View profile 3

      &V4        View profile 4

      &V5        View factory default profiles

      &V6        Views settings on phone line 1

      &V7        Views settings on phone line 2

                             DATA COMPRESSION

  Type:           Configuration

  Format:         AT [cmds] &Kn [cmds]

  Description:    Enables/disables V.42bis data compression in V.120/X.75
                  mode

    Command                              Function

      &K00        V.42bis disabled

      &K44        V.42bis enabled

                           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 handshaking or connected





                     D-CHANNEL COMMUNICATION PROTOCOLS

  Type:          Configuration

  Format:        AT [cmds] Pn [cmds]

  Description:   Selects the communication protocol for D-channel calls

    Command                              Protocol

      ? P0       Northern Telecom proprietary selection

       P1        National ISDN 1 (1 SPID)

       P2        National ISDN 1 (2 SPID)

       P4        AT&T custom piont to point

       P5        AT&T custom piont to multipoint (1 SPID)

       P6        AT&T custom piont to multipoint (2 SPID)

                                   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

          D+             Second number string prefix. Used for bundling
                         or MPPP calls

          DW             Dialing resumed following dial tone detection

          D,             Dialing paused for amount of time specified in
                         S6 register

          DY0            Number type unknown

          DY1            International number

          DY2            National number

          DY3            Network specific number

          DY4            Subscriber number

          DY6            Abbreviated number

          DZ0            Type of subaddress, NSAP with AFI=$50, IA5
                         characters

          DZ2            Type of subaddress, user specified, IA5
                         characters

          DN0            Numbering plan unknown

          DN1            ISDN/Telephony numbering plan (CCITT
                         E.164/E.163)

          DN3            Data numbering plan (CCITT X.121)

          DN8            National standard numbering plan

          DN9            Private numbering plan

          D/             Called pary subaddress delimiters

          DA             Dials number on telephone line 1

          DB             Dials number on telephone line 2

          DI             Dials number for ISDN data call

         DN0=n           User enters USA switches, first phone number

         DN1=n           User enters USA switches, second phone number

          DSn            Dial stored telephone number n. (n = 0-39)

                        DIALING COMMANDS CALL TYPE

  Type:          Configuration

  Format:        AT [cmds] &On [cmds]

  Description:   Selects the call type for conventional dialing commands

    Command                                Mode

      &O0        Analog phone line 2

      &O1        ISDN mode

      &O2        Analog phone line 1





                                DTR SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Dn [cmds]

  Description:   Controls the behavior of the DTR signal.

    Command                              Function

      &D0         DTR forced high.

      &D1         Device enters command mode when DTR goes low.

     ? &D2        Device hangs up and returns to command mode on low DTR.

      &D3         Device resets on low DTR.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Hn [cmds]

  Description:   Disables flow control options

    Command                              Function

      &H0        Flow control disabled

     ? &H3       RTS to CTS flow control disabled

      &H4        XON/XOFF flow control disabled

                               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)

       H3        Phone line 1 commanded to go on-hook (hang-up)

       H4        Phone line 2 commanded to go on-hook (hang-up)

                       ISDN COMMUNICATION PROTOCOLS

  Type:                  Configuration

  Format:                AT [cmds] Bn [cmds]

  Description:           Selects the communication protocol for data
                         calls

            Note: The B command allows the simultaneous selection of more
            than one suffix, enabling multiple protocols. B must be
            followed by two digits.

        Command                              Protocol

          B00            X.75 Transparent

          B01            X.75 T.70

          B04            BTX (Data X-J)

          B10            V.110 follows DTE speed (async). V.110
                         determined by in-band negotiation (sync)

          B13            V.110 at 2400bps

          B14            V.110 at 4800bps

          B15            V.110 at 9600bps

          B16            V.110 at 14.4Kbps

          B17            V.110 at 19.2Kbps

          B18            V.110 at 38.4Kbps (sync only)

          B19            V.110 at 57.6Kbps (sync only)

          B20            V.120

          B40            PPP async to sync conversion

          B41            SLIP async to sync conversion



                                  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 with no retraining enabled

                      REPEAT PREVIOUS COMMAND OR CALL

  Type:          Immediate

  Format:        A>

  Description:   Repeats previous command once or last call up to 9
                 times.

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0             Reports product ID

       I1        Reports product information & ROM checksum

       I3        Reports link status

       I9        Reports Microsoft PnP code

                                RING VOLUME

  Type:          Configuration

  Format:        AT [cmds] Nn [cmds]

  Description:   Controls ring volume

    Command                              Function

       N0        Audio ring disabled

       N1        Low volume setting

       N2        Medium volume setting

      ? N3       Highest volume setting

                     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 - 47 enabled.

         X2            Busy tone detection enabled, dial tone detection
                       disabled; result codes 0 - 6,

                       10 - 47 enabled

         X3            Busy tone detection disabled, dial tone detection
                       enabled; result codes 0 - 5,

                       7 - 47 enabled

         X4            Busy and dial tone detection enabled; result codes
                       0 - 47 enabled.

         X5            Busy and dial tone detection enabled; result codes
                       0 - 47 enabled.

         X6            Busy and dial tone detection enabled; result codes
                       0 - 18, 35, 38 - 47 enabled.

         X7            Busy and dial tone detection enabled; result codes
                       0 - 18, 35, 38 - 47 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 0

          Z1           Restore setting 1

          Z2           Restore setting 3

          Z3           Restore setting 4

          Z4           Restore factory default settings

                           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 stored profile 0

       &W1         Write the active profile to stored profile 1

       &W2         Write the active profile to stored profile 2

       &W3         Write the active profile to stored profile 3

                                TEST MODES

  Type:          Immediate

  Format:        AT [cmds] &Tn

  Description:   Selects test options

    Command                              Function

      &T9        Initiates ISDN loopback test

      &T10       Initiates ISDN loopback with self diagnostic test

                              Special Commands

                               ADD-THRESHOLD

  Type:          Configuration

  Format:        AT [cmds] JAn [cmds]

  Range:         0-255

  Default:       48

  Unit:          Kbps

  Description:   Determines the add-threshold for MNPPP

                             B-CHANNEL NUMBER

  Type:                  Configuration

  Format:                AT [cmds] &Zin=(phone # & subaddress)

  Description:           Assigns the phone numbers for various B-channel
                         protocols. ZI? Displays B-channel phone numbers

        Command                              Protocol

          &ZI0           Assigns MSNs for X.75

          &ZI1           Assigns MSNs for V.110

          &ZI2           Assigns MSNs for V.120

          &ZI3           Assigns MSNs for PPP, MPPP

          &ZI4           Assigns MSNs for ISDN data, protocal auto-detect

          &ZI6           Assigns the phone numbers for analog phone line
                         1

          &ZI7           Assigns the phone numbers for analog phone line
                         2



                           BOD ADD-PERSIST (MIN)

  Type:          Configuration

  Format:        AT [cmds] KAMn [cmds]

  Range:         0-63

  Default:       0

  Unit:          1min

  Description:   Determines the add-persist time interval for BOD

                              BOD ADD-PERSIST

  Type:          Configuration

  Format:        AT [cmds] KAxn [cmds]

  Range (n):     0-63

  Default:       0

  Unit (x):      S=1sec, M=1min

  Description:   Determines the add-persist time interval for BOD

                              BOD SUB-PERSIST

  Type:          Configuration

  Format:        AT [cmds] KSxn [cmds]

  Range (n):     0-63

  Default:       0

  Unit (x)::     S=1sec, M=1min

  Description:   Determines the sub-persist time interval for BOD

                               CALL BUMPING

  Type:          Configuration

  Format:        AT [cmds] CEn [cmds]

  Description:   Enables/disables call bumping

    Command                              Protocol

      CE0        Call bumping disabled

      CE1        Call bumping enabled

                                CALL RESUME

  Type:           Configuration

  Format:         AT [cmds] CRn [cmds]

  Range:          0-3

  Description:    Resumes a previously suspended call; n is the call
                  identifier

  Note:           Command for use in Europe

                               CALL SUSPEND

  Type:          Configuration

  Format:        AT [cmds] CSn [cmds]

  Range:         0-3

  Description:   Suspends a call; n is the call identifier

  Note:          Command for use in Europe





                                 CALLBACK

  Type:          Configuration

  Format:        AT [cmds] *GCn [cmds]

  Description:   Enables/disables callback function

    Command                              Function

      *GC1       Callback function disabled

      *GC2       Callback function enabled

                             CALLBACK LOCATION

  Type:          Configuration

  Format:        AT [cmds] *HCn=x [cmds]

  Description:   Assigns a storage location to callback phone number x

    Command                              Function

      *HC0       Callback number stored in location 0

      *HC1       Callback number stored in location 1

      *HC2       Callback number stored in location 2

      *HC3       Callback number stored in location 3

      *HC4       Callback number stored in location 4

                                 CALLER ID

  Type:          Immediate

  Format:        AT [cmds] *T [cmds]

  Description:   Recalls caller ID information

                             CHARACTER LENGTH

  Type:            Configuration

  Format:          AT [cmds] *Hn [cmds]

  Description:     Sets the character length; including start, stop, and
                   parity bit

     Command                              Function

       *C0         10-bit character length

       *C1         11-bit character length

       *C2         9-bit character length

       *C3         8-bit character length

                                  CHARGE

  Type:          Immediate

  Format:        AT [cmds] CH? [cmds]

  Description:   Displays accumulated charging unit of last call

                             DATA PACKET SIZE

  Type:                Configuration

  Format:              AT [cmds] CLn [cmds]

  Range:               0-2048

  Unit:                8

  Description:         Determines the maximum size of user data in a
                       packet. CL? Queries current setting

                               DIAL POINTER

  Type:            Configuration

  Format:          AT [cmds] *Dn [cmds]

  Range:           0-39

  Default:         0

  Unit:            ASCII

  Description:     Sets the default dial pionter for telephone directory
                   location n





                             FIRMWARE DOWNLOAD

  Type:           Configuration

  Format:         AT [cmds] UPX [cmds]

  Description:    Downloads firmware to the flash EPROM using X-modem
                  protocol

                                LOOPBACK 4

  Type:          Configuration

  Format:        AT [cmds] CPn [cmds]

  Description:   Enables/disables loopback 4

    Command                              Protocol

      CP0        Loopback 4 disabled

      CP1        Loopback 4 enabled

                              PASSWORD TABLE

  Type:          Configuration

  Format:        AT [cmds] *Hn [cmds]

  Range:         0-39

  Unit:          ASCII

  Description:   Modifies user password table at location n

                       PREFIX NUMBER (INTERNATIONAL)

  Type:                  Configuration

  Format:                AT [cmds] CIn [cmds]

  Description:           Determines prefix number string to be added to
                         the calling party number before indicating to
                         the DTE international number type

                         PREFIX NUMBER (NATIONAL)

  Type:                  Configuration

  Format:                AT [cmds] CNn [cmds]

  Description:           Determines prefix number string to be added to
                         the calling party number before indicating to
                         the DTE national number type

                            SECURITY FUNCTIONS

  Type:                  Configuration

  Format:                AT [cmds] *Gn [cmds]

  Description:           Enables type 2 security, sets password check and
                         callback security options

        Command                              Function

          *G3            Type 2 security enabled with password check

          *G4            Type 2 security enabled with password check and
                         callback

          *G5            Type 2 security enabled with password check and
                         callback; remote site enters the callback number

                                SPID NUMBER

  Type:          Configuration

  Format:        AT [cmds] SPIDn=(SPID #)

  Unit:          Unidentified

  Description:   Sets the SPID number for USA switches

    Command                              Protocol

     SPID0        Sets SPID number 1

     SPID1        Sets SPID number 2





                               SUB-THRESHOLD

  Type:          Configuration

  Format:        AT [cmds] JSn [cmds]

  Range:         0-255

  Default:       32

  Unit:          Kbps

  Description:   Determines the sub-threshold for MNPPP

                           SUPERVISORY PASSWORD

  Type:          Configuration

  Format:        AT [cmds] *HS [cmds]

  Description:   Modifies supervisory password. Dafault password is
                 NETGEAR

                               VIEW CALLBACK

  Type:          Immediate

  Format:        AT [cmds] *VC [cmds]

  Description:   Views callback number table

                               VIEW PASSWORD

  Type:          Immediate

  Format:        AT [cmds] *V [cmds]

  Description:   Views password table

                               WRITE NUMBER

  Type:                Configuration

  Format:              AT [cmds] &ZOn=(phone # & subaddress)

  Description:         Writes phone number to be used as the calling
                       party number. ZO? displays setting

       Command                              Protocol

        &ZOI           Calling party number on ISDN interface

        &ZOA           Calling party number on analog phone line 1

        &ZOB           Calling party number on analog phone line 2

                            S(status) -REGISTERS

                          1TR6 OUTGOING SERVICES

  Type:           Register

  Format          AT [cmds] S104x=n [cmds]

  Description:    Determines outgoing service options.

    Command                              Function

      x=0        PHONE 2 service

      x=2        ISDN data service

      x=3        PHONE 1 service

                           ADD-THRESHOLD FOR BOD

  Type:          Register

  Format:        AT [cmds] S126=n [cmds]

  Range:         0-255

  Unit:          Kbps

  Description:   Determines the add-threshold for BOD



                B-CHANNEL 1 ACCUMULATED CHARGING UNIT (MSB)

  Type:           Register

  Format:         AT [cmds] S120=n [cmds]

  Range:          Unidentified

  Unit:           Unidentified

  Description:    Determine the accumulated charging unit (MSB) for
                  B-channel 1

                B-CHANNEL 1 ACCUMULATED CHARGING UNIT(LSB)

  Type:           Register

  Format:         AT [cmds] S121=n [cmds]

  Range:          Unidentified

  Unit:           Unidentified

  Description:    Determine the accumulated charging unit (LSB) for
                  B-channel 1

                B-CHANNEL 2 ACCUMULATED CHARGING UNIT (MSB)

  Type:           Register

  Format:         AT [cmds] S122=n [cmds]

  Range:          Unidentified

  Unit:           Unidentified

  Description:    Determine the accumulated charging unit (MSB) for
                  B-channel 2

                B-CHANNEL 2 ACCUMULATED CHARGING UNIT(LSB)

  Type:           Register

  Format:         AT [cmds] S123=n [cmds]

  Range:          Unidentified

  Unit:           Unidentified

  Description:    Determine the accumulated charging unit (LSB) for
                  B-channel 2

                   B-CHANNEL BUNDLING PROTOCOL SELECTION

  Type:          Register

  Format         AT [cmds] S100=n [cmds]

  Description:   Sets B-channel bundling protocol

    Command                              Function

     S100=0      MLP

     S100=1      Cfos (European models)





                         BIT-MAPPED REGISTER S118

  Format:                   AT [cmds] S118n [cmds]

  Range:                    0-255

  Description:              Enables/disables dial-in call; selects
                            default B-channle speed, incoming call
                            acceptance, and bearer service

        Bit          Value                      Function

         0                 0   Dial-in call enabled

                          1    Dial-in call disabled

         1                0    Not used

         2                 0   64Kbps ISDN B-channel speed

                          1    56Kbps ISDN B-channel speed

         3                0    Not used

         4                 0   3.1KHz bearer service priority on PHONE 2

                          1    Speech bearer service priority on PHONE 2

         5                 0   3.1KHz bearer service priority on PHONE 1

                          1    Speech bearer service priority on PHONE 1

         6                 0   Global call accepted

                          1    Global calls rejected if MSN is unmatched

         7                 0   Analog incoming calls enabled

                          1    analog icoming calls disabled

                         BIT-MAPPED REGISTER S119

  Format:                  AT [cmds] S119n [cmds]

  Range:                   0-255

  Description:             Enables/disables callback function, DDI
                           function, MSN matching; controls V.110 speed

       Bit          Value                      Function

        0                 0   Callback function disabled

                         1    Callback function enabled

        1                 0   DDI point-to-point signaling disabled

                         1    DDI point-to-point signaling enabled

        2                 0   DDI point-to-multipoint signaling disabled

                         1    DDI point-to-multipoint signaling enabled

        3                 0   Inbound call ignored if MSN is unmatched

                         1    Inbound call accepted if MSN is unmatched

        4                 0   V.110 user rate set to 19.2Kbps if DTE
                              speed is greater than 19.2Kbps
                         1
                              V.110 user rate set to 38.4Kbps if DTE
                              speed is greater than 38.4Kbps

        5                 0   Normal MSN function enabled

                         1    Treats number assigned by &ZI=n as a
                              subaddress, and matches it to the called
                              party subaddress

        7                0    Not used

                         BIT-MAPPED REGISTER S125

  Format:             AT [cmds] S125n [cmds]

  Range:              0-255

  Description:        Controls sub-persist time interval

     Bit        Value                        Function

      0              0    Not used

     1-6             ?    Controls sub-persist time interval; further
                          information not available

      7               0   Sub-persist time interval in second unit

                     1    Sub-persist time interval in minute unit





                          BIT-MAPPED REGISTER S15

  Format            AT [cmds] S23=n [cmds]

  Range:            0-255

  Unit:             Bit-mapped

  Description:      Determines parity, stop bits, character length, and
                    power-up profile

   Bit     Value                          Function

   0,1         00   Parity even

               01   Parity odd

              10    Mark or No Parity

    2           0   1stop bit

               1    2 stop bits

   4,3         00   10-bit character length

               01   11-bit character length

               10   9-bit character length

              11    8-bit character length

   7-5         00   Power on profile 1

               01   Power on profile 2

               10   Power on profile 3

              11    Power on factory default profile

                          BIT-MAPPED REGISTER S21

  Format           AT [cmds] S21=n [cmds]

  Range:           0-255

  Unit:            Bit-mapped

  Description:     Enables speaker, controls DTR/DCD/DSR signals & low
                   DTR action

   Bit    Value                           Function

   0-2        00   Speaker always off

              01   Speaker on until carrier is detected

             10    Speaker always on

    3          0   DSR forced high

              1    DSR normal

    4          0   DCD forced high

              1    DCD normal

    5          0   DCD forced high

              1    DCD normal

   6-7        00   DTR assumed on

              01   DTR toggle causes default number to dial

              10   Hang up and return to command mode on low DTR

             11    Hang up and reset to profile 0 on low DTR





                          BIT-MAPPED REGISTER S23

  Format:               AT [cmds] S23=n [cmds]

  Range:                0-255

  Description:          Select command echo, automode and extended result
                        code format.

      Bit         Value                       Function

       0                0   Command echo enabled

                       1    Command echo disabled

       1               0    Not used

       2               00   Insertion not allowed during phone call

                      01    Insertion allowed during phone call

      3-5             000   Busy and dial tone detection disabled; result
                            codes 0 - 4 enabled.
                      001
                            Busy and dial tone detection disabled; result
                      010   codes 0 - 5, 10 - 47 enabled.

                      011   Busy tone detection enabled, dial tone
                            detection disabled; result codes 0 - 6,
                     100
                            10 - 47 enabled.

                            Busy tone detection disabled, dial tone
                            detection enabled; result codes 0 - 5,

                            7 - 47 enabled.

                            Busy and dial tone detection enabled; result
                            codes 0 - 47 enabled.

       6                0   Result codes displayed in numeric format

                       1    Result codes displayed in verbose format

       7               0    Not used

                          BIT-MAPPED REGISTER S24

  Format:                 AT [cmds] S24=n [cmds]

  Range:                  0-255

  Description:            Selects ring volume, speaker control (S21 bits
                          1-2) ignore function, and speaker volume

       Bit          Value                      Function

       0,1               00   Ring volume at minimum

                         01   Ring volume increased by 1 decimal

                        11    Ring volume increased by 2 decimals

        2                 0   Ignore S21 bits 1-2 speaker enable when
                              phone 1 keypad is dialed
                         1
                              Do not ignore S21 bits 1-2 speaker enable
                              when phone 1 keypad is dialed

        3                 0   Ignore S21 bits 1-2 speaker enable when
                              phone 2 keypad is dialed
                         1
                              Do not ignore S21 bits 1-2 speaker enable
                              when phone 2 keypad is dialed

       5,4               0    Speaker volume control in increments of 16

       6,7               0    Not used

                          BIT-MAPPED REGISTER S35

  Format:             AT [cmds] S35=n [cmds]

  Range:              0-255

  Description:        Enables default dail, extended numeric result codes

     Bit        Value                        Function

     0-3            0    Not used

      4              0   Do not dial default number when Data/Voice is
                         pressed
                    1
                         Dials default number when Data/Voice is pressed

     6-5            0    Not used

      7              0   Extended numeric result codes in error
                         correction mode are disabled
                    1
                         Extended numeric result codes in error
                         correction mode are enabled





                          BIT-MAPPED REGISTER S38

  Format:                    AT [cmds] S38=n [cmds]

  Range:                     0-255

  Description:               Enables repeat dialing, DCD toggle

        Bit           Value                     Function

         0                   0  Repeatedly dials default number

                            1   Does not repeatedly dial default number

         1                  0   Not used

         3                   0  DCD toggle does not follow UNIX standard

                            1   DCD toggle follows UNIX standard. DCD
                                high before connect message is sent, DCD
                                off after last DCE response is sent

        4-7                 0   Not used

                          BIT-MAPPED REGISTER S40

  Format:            AT [cmds] S40=n [cmds]

  Range:             0-255

  Description:       Enables result code display in answer mode

     Bit        Value                       Function

      0             0   Not used

      1              0  Result code display in answer mode enabled

                    1   Result code display in answer mode disabled

     2-7            0   Not used

                          BIT-MAPPED REGISTER S41

  Format:            AT [cmds] S41=n [cmds]

  Range:             0-255

  Description:       Enables CCITT signals 140 & 141 on EIA-232D
                     interface

     Bit        Value                       Function

     0-2            0   Not used

      3              0  CCITT signals 140 & 141 on EIA-232D interface
                        disabled
                    1
                        CCITT signals 140 & 141 on EIA-232D interface
                        enabled

     4-7            0   Not used

                          BIT-MAPPED REGISTER S42

  Format:             AT [cmds] S42=n [cmds]

  Range:              0-255

  Description:        Controls escape sequence Data/Voice button, and
                      <RINGING> result code

     Bit        Value                        Function

      0              0    Not used

      3               0   Escape code sequence in answer mode enabled

                     1    Escape code sequence in answer mode disabled

      4              0    Not used

      5               0   Voice/Data button enabled

                     1    Voice/Data button disabled

      6               0   Ringing result code enabled

                     1    Ringing result code disabled

      7              0    Not used





                          BIT-MAPPED REGISTER S44

  Format:                  AT [cmds] S44=n [cmds]

  Range:                   0-255

  Description:             Controls escape sequence Data/Voice button,
                           and <RINGING> result code

       Bit           Value                      Function

        0                 0    Not used

        3                  0   ATDSn does not initiate auto-dial if the
                               stored numbers cinsecutively until
                          1    connection is made

                               ATDSn does not initiates auto-dial if the
                               stored numbers cinsecutively until
                               connection is made

        4                  0   DSR does not follow DTR

                          1    DSR follows DTR

       5-7                0    Not used

                          BIT-MAPPED REGISTER S80

  Format:             AT [cmds] S80=n [cmds]

  Range:              0-255

  Description:        Controls sending of low-layer compatibility
                      information

     Bit        Value                        Function

     0-3            0    Not used

      4              0   Does not send low-layer compatibility
                         information for PHONE 2
                    1
                         Send low-layer compatibility information for
                         PHONE 2

      5             0    Not used

      6              0   Does not send low-layer compatibility
                         information for ISDN call
                    1
                         Send low-layer compatibility informatin for ISDN
                         call

      7              0   Does not send low-layer compatibility
                         information for PHONE 1
                    1
                         Send low-layer compatibility information for
                         PHONE 1

                          BIT-MAPPED REGISTER S83

  Format:            AT [cmds] S83=n [cmds]

  Range:             0-255

  Description:       Controls loopback and dial commands

     Bit        Value                       Function

      0              0  Loopback 4 test disabled

                    1   Lopback 4 test enabled

      2              0  ISDN without V.42bis enabled

                    1   ISDN with 42bis enabled

      3             0   Not used

     4-5            00  ATD, ATDP, and ATDT commands are mapped to ATDM

                    01  ATD, ATDP, and ATDT commands are mapped to ATDI

                   10   ATD, ATDP, and ATDT commands are mapped to ATDB

     6-7            0   Not used





                          BIT-MAPPED REGISTER S84

  Format:             AT [cmds] S84=n [cmds]

  Range:              0-255

  Description:        Controls S-register display format, caller ID, and
                      phone priority

     Bit        Value                        Function

     0-2            0    Not used

      3              0   S-register not displayed in hexidecimal format

                    1    S-register displayed in hexidecimal format

      4              0   Indicates caller ID after first ring message

                    1    Caller ID disabled

      5              0   PHONE 1 given call priority

                    1    PHONE 2 given call priority

     6-7            0    Not used

                          BIT-MAPPED REGISTER S85

  Format:             AT [cmds] S85n [cmds]

  Range:              0-255

  Description:        Controls DCA function, add-persist time interval

     Bit        Value                        Function

      0               0   DCA function enabled

                     1    DCA function disabled

     1-6             ?    Controls add-persist time interval; further
                          information not available

      7               0   Add-persist time interval in secondits

                     1    Add-persist time interval in minute unite

                          BIT-MAPPED REGISTER S87

  Format:            AT [cmds] S87n [cmds]

  Range:             0-255

  Description:       Enables/disables bundle connection

     Bit        Value                       Function

     0-4            0   Not used

     5,6            00  Bundle mode connection disabled

                    01  Bundle connection enabled in answer mode only

                    11  Bundle connection enabled in call mode only

                   10   Bundle connection enabled in both directions

      7             0   Not used

                          BIT-MAPPED REGISTER S89

  Format:            AT [cmds] S89n [cmds]

  Range:             0-255

  Description:       Enables/disables metering pulse

     Bit        Value                       Function

     0-4            0   Not used

      5              0  Metering pulse disabled on PHONE 2

                    1   Metering pulse enabled on PHONE 2

      6              0  Metering pulse disabled on PHONE 1

                    1   Metering pulse enabled on PHONE 1

      7             0   Not used





                       D-CHANNEL PROTOCOL SELECTION

  Type:                Register

  Format               AT [cmds] S86=n [cmds]

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

       Command                              Function

        S86=0          Northern telecom proprietary ISDN

        S86=1          National ISDN 1

        S86=2          National ISDN 2

        S86=3          Reserved

        S86=4          AT&T proprietary point-to-piont

        S86=5          AT&T proprietary point-to-multipoint

        S86=6          AT&T custom point-to-multipoint

                              DTE LINE SPEED

  Type:                Register

  Format               AT [cmds] S20=n [cmds]

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

       Command                              Function

        S20=0          230.4Mbps

        S20=1          115.2Mbps

        S20=3          57.6Kbps

        S20=5          38.4bps

        S20=5          19.2bps

        S20=9          9600bps

       S20=11          4800bps

       S20=12          2400bps

       S20=13          19.2Kbps

       S20=14          460.8Mbps

       S20=15          921.6Mbps

                              FIXED BAUD RATE

  Type:          Register

  Format         AT [cmds] S18=n [cmds]

  Description:   Sets the fixed baud rate at idle

    Command                              Function

     S18=0       230.4Mbps

     S18=1       115.2Mbps

     S18=3       57.6Kbps

     S18=5       38.4bps

     S18=5       19.2bps

     S18=9       9600bps

     S18=11      4800bps

     S18=12      2400bps

     S18=13      19.2Kbps

     S18=14      460.8Mbps

     S18=15      921.6Mbps





                               FLOW CONTROL

  Type:          Register

  Format         AT [cmds] S27 [cmds]

  Description:   Displays the current flow control

     Value                               Meaning

       0         Flow control disabled

       3         RTS/CTS flow control enabled

       4         XON/XOFF flow control enabled

       5         Reserved

                       FLOW CONTROL CHARACTER - XOFF

  Type:          Register

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

  Range:         0-255

  Unit:          ASCII

  Description:   Sets the character used to represent XOFF

                       FLOW CONTROL CHARACTER - XON

  Type:          Register

  Format:        AT [cmds] S31=n [cmds]

  Range:         0-255

  Unit:          ASCII

  Description:   Sets the character used to represent XON

                          HOOK FLASH DETECT TIME

  Type:          Register

  Format:        AT [cmds] S56=n [cmds]

  Range:         0-255

  Unit:          10ms

  Description:   Determines the hook flash detect time for analog adapter

                         I-FIELD DATA LENGTH (LSB)

  Type:          Register

  Format:        AT [cmds] S115=n [cmds]

  Range:         Unidentified

  Unit:          ASCII

  Description:   Sets I-field data length (LSB)

                         I-FIELD DATA LENGTH (MSB)

  Type:          Register

  Format:        AT [cmds] S114=n [cmds]

  Range:         Unidentified

  Unit:          ASCII

  Description:   Sets I-field data length (MSB)

                            IP PACKET INTERVAL

  Type:          Register

  Format:        AT [cmds] S124=n [cmds]

  Range:         0-255

  Unit:          1sec

  Description:   Empties IP packet interval for PPP





                          ISDN B-CHANNEL PROTOCOL

  Type:          Register

  Format         AT [cmds] S82=n [cmds]

  Description:   Determines ISDN B channel protocol

    Command                              Function

     S82=60      V.120 at 64Kbps

     S82=61      V.120 at 56Kbps

     S82=62      X.75 at 64Kbps transparent

     S82=63      X.75 at 56Kbps transparent

     S82=64      X.75 at 64Kbps T.70

     S82=65      X.75 at 56Kbps T.70

     S82=72      V.110 at 64Kbps

     S82=73      V.110 at 56Kbps

     S82=74      PPP async to sync 64Kbps

     S82=75      PPP async to sync 56Kbps

     S82=76      SLIP to sync HDLC conversion at 64Kbps

     S82=77      SLIP to sync HDLC conversion at 56Kbps

                    ISDN B-CHANNEL PROTOCOL (OUTGOING)

  Type:          Register

  Format         AT [cmds] S102=n [cmds]

  Description:   Determines outgoing ISDN B-channel protocol

    Command                              Function

    S102=60      V.120 at 64Kbps

    S102=61      V.120 at 56Kbps

    S102=62      X.75 at 64Kbps transparent

    S102=63      X.75 at 56Kbps transparent

    S102=64      X.75 at 64Kbps T.70

    S102=65      X.75 at 56Kbps T.70

    S102=72      V.110 at 64Kbps

    S102=73      V.110 at 56Kbps

    S102=74      PPP async to sync 64Kbps

    S102=75      PPP async to sync 56Kbps

    S102=76      SLIP to sync HDLC conversion at 64Kbps

    S102=77      SLIP to sync HDLC conversion at 56Kbps

                           PHONE NUMBER POINTER

  Type:          Register

  Format         AT [cmds] S29=n [cmds]

  Range:         0-39

  Unit:          Unidentified

  Description:   Sets the default phone number pointer



                               REGISTER S108

  Type:                  Register

  Format                 AT [cmds] S108x=n [cmds]

  Description:           Determines device mode, stop bits, parity,
                         speed. Values in hexidecimal

        Command                             Function

          x=0           PHONE 2 service

          x=2           ISDN data service

          x=3           PHONE 1 service

      Value (hex)                           Function

          00             Default values: 64kbps. 8 data bits, 1 stop bit,
                         no parity, no high-layer compatibility

          01             ISDN mode

          02             Analog mode, fax group 3

          03             Data mode

          04             BTX mode, fax group 3,4

          08             Even parity

          10             2 stop bits

          20             7 data bits

          28             Teletex service

          31             Teletex service

          32             Information interworking for video

          35             Teletex service

          38             message handling systems

          40             38.4Kbps async mode

          41             OSI application

        A0, C0           V.110 sync mode at 1200bps

        A3, C3           2400bps

        A4, C4           4800bps

        A5, C5           9600bps

        A6, C6           14.4Kbps

        A7, C7           19.2Kbps

          A8             48.0Kbps

          A9             56.0Kbps

          AA             56.oKbps

          AF             In-band negotiation

                             SECURITY CALLBACK

  Type:          Register

  Format:        AT [cmds] S64=n [cmds]

  Range:         0-255

  Unit:          1sec

  Description:   Sets security callback timer

                           SUB-THRESHOLD FOR BOD

  Type:          Register

  Format:        AT [cmds] S127=n [cmds]

  Range:         0-255

  Unit:          Kbps

  Description:   Determines the sub-threshold for BOD



                                TEST MODES

  Type:            Register

  Format:          AT [cmds] S16=n [cmds]

  Range:           0-125

  Unit:            Bit-mapped

  Description:     Controls loopback tests, analog, digital

   Bit    Value                           Function

    0          0   Local analog loopback not in progress

              1    Local analog loopback in progress

    1         0    Not used

    2          0   Local digital loopback not in progress

              1    Local digital loopback in progress

                              V.110 USER RATE

  Type:          Register

  Format:        AT [cmds] S117=n [cmds]

  Range:         Unidentified

  Unit:          Unidentified

  Description:   Sets V.110 user rate

