
3COM CORPORATION

US ROBOTICS NETSERVER I-MODEM/8

Card Type                    Modem (asynchronous), ISDN
Chip Set                     Unidentified
Maximum Modem Rate           33.6Kbps
Maximum Fax Rate             14.4Kbps
Data Modulation Protocol     Unidentified
Fax Modulation Protocol      Unidentified
Error Correction/Compression Unidentified
Fax Class                    Class I & II
Data Bus                     External

[Image]

                                CONNECTIONS

        Function          Label              Function              Label

  DC power                     CN1       RJ-45 jack channel 5/6     CN7

  RJ-45 jack channel 1/2       CN3       RJ-45 auxiliary            CN8
                                         connector

  RJ-45 jack channel 3/4       CN4       RJ-45 console connector    CN9

  BNC network connector        CN5       RJ-45 jack channel 7/8    CN10

  RJ-45 network connector      CN6       Power switch               SW1

            Note: CN3, CN4, CN7, CN10 jacks accept either RJ-11 or RJ-45
            connectors.





















                        USER CONFIGURABLE SETTINGS

                  Setting                       Label         Position

  Load defaults from NVRAM                      SW1/1            Off

  Load defaults from ROM                        SW1/1            On

  Command odd set recognition disabled          SW1/2            Off

  Command odd set recognition enabled           SW1/2            On

  Factory configured - do not alter             SW1/3        Unidentified

  Factory configured - do not alter             SW1/4        Unidentified

  Use software configured baud rate             SW2/3            Off

  Force DIP switch rate                         SW2/3            On

  Normal flash memory operation                 SW2/4            Off

  Erase flash memory on boot-up                 SW2/4            On

  Factory configured - do not alter            SW2/5-10      Unidentified

  CONSOLE PORT BAUD RATE

  Rate     SW2/1    SW2/2

  9600      Off      Off

  19200     Off      On

  38400     On       Off

  57600     On       On

                             DIAGNOSTIC LED(S)

   LED       Color           Status                   Condition

   LED1       Off              Off                    Power off

   LED1      Green             On                      Power on

   LED1       Red              On                  Critical failure

   LED2       Off              Off                  Channel 1 idle

   LED2      Green             On                 Channel 1 on-line

   LED2      Green          Blinking          Channel 1 testing data link
                                                        layer

   LED2      Yellow        Blinking (8         Channel 1 searching for U
                           times/sec.)                interface

   LED2      Yellow        Blinking (1        Channel 1 searching for S/T
                           times/sec.)                interface

   LED2      Yellow            On                 Channel 1 dialing

   LED2       Red              On              Channel 1 U interface not
                                                        found

   LED2       Red           Blinking           Channel 1 incorrect SPID

   LED3       Off              Off                  Channel 2 idle

   LED3      Green             On                 Channel 2 on-line

   LED3      Green          Blinking          Channel 2 testing data link
                                                        layer

   LED3      Yellow        Blinking (8         Channel 2 searching for U
                           times/sec.)                interface

   LED3      Yellow        Blinking (1        Channel 2 searching for S/T
                           times/sec.)                interface

   LED3      Yellow            On                 Channel 2 dialing

   LED3       Red              On              Channel 2 U interface not
                                                        found

   LED3       Red           Blinking           Channel 2 incorrect SPID











                         DIAGNOSTIC LED(S) (CONT)

   LED       Color           Status                   Condition

   LED4       Off              Off                  Channel 3 idle

   LED4      Green             On                 Channel 3 on-line

   LED4      Green          Blinking          Channel 3 testing data link
                                                        layer

   LED4      Yellow        Blinking (8         Channel 3 searching for U
                           times/sec.)                interface

   LED4      Yellow        Blinking (1        Channel 3 searching for S/T
                           times/sec.)                interface

   LED4      Yellow            On                 Channel 3 dialing

   LED4       Red              On              Channel 3 U interface not
                                                        found

   LED4       Red           Blinking           Channel 3 incorrect SPID

   LED5       Off              Off                  Channel 4 idle

   LED5      Green             On                 Channel 4 on-line

   LED5      Green          Blinking          Channel 4 testing data link
                                                        layer

   LED5      Yellow        Blinking (8         Channel 4 searching for U
                           times/sec.)                interface

   LED5      Yellow        Blinking (1        Channel 4 searching for S/T
                           times/sec.)                interface

   LED5      Yellow            On                 Channel 4 dialing

   LED5       Red              On              Channel 4 U interface not
                                                        found

   LED5       Red           Blinking           Channel 4 incorrect SPID

   LED6       Off              Off                  Channel 5 idle

   LED6      Green             On                 Channel 5 on-line

   LED6      Green          Blinking          Channel 5 testing data link
                                                        layer

   LED6      Yellow        Blinking (8         Channel 5 searching for U
                           times/sec.)                interface

   LED6      Yellow        Blinking (1        Channel 5 searching for S/T
                           times/sec.)                interface

   LED6      Yellow            On                 Channel 5 dialing

   LED6       Red              On              Channel 5 U interface not
                                                        found

   LED6       Red           Blinking           Channel 5 incorrect SPID

   LED7       Off              Off                  Channel 6 idle

   LED7      Green             On                 Channel 6 on-line

   LED7      Green          Blinking          Channel 6 testing data link
                                                        layer

   LED7      Yellow        Blinking (8         Channel 6 searching for U
                           times/sec.)                interface

   LED7      Yellow        Blinking (1        Channel 6 searching for S/T
                           times/sec.)                interface

   LED7      Yellow            On                 Channel 6 dialing

   LED7       Red              On              Channel 6 U interface not
                                                        found

   LED7       Red           Blinking           Channel 6 incorrect SPID

   LED8       Off              Off                  Channel 7 idle

   LED8      Green             On                 Channel 7 on-line

   LED8      Green          Blinking          Channel 7 testing data link
                                                        layer

   LED8      Yellow        Blinking (8         Channel 7 searching for U
                           times/sec.)                interface

   LED8      Yellow        Blinking (1        Channel 7 searching for S/T
                           times/sec.)                interface

   LED8      Yellow            On                 Channel 7 dialing

   LED8       Red              On              Channel 7 U interface not
                                                        found

   LED8       Red           Blinking           Channel 7 incorrect SPID











                         DIAGNOSTIC LED(S) (CONT)

   LED      Color          Status                   Condition

   LED9      Off            Off                   Channel 8 idle

   LED9     Green            On                 Channel 8 on-line

   LED9     Green         Blinking          Channel 8 testing data link
                                                      layer

   LED9     Yellow       Blinking (8         Channel 8 searching for U
                        times/sec.)                 interface

   LED9     Yellow       Blinking (1        Channel 8 searching for S/T
                        times/sec.)                 interface

   LED9     Yellow           On                 Channel 8 dialing

   LED9      Red             On           Channel 8 U interface not found

   LED9      Red          Blinking           Channel 8 incorrect SPID

  LED10      Red             On                     POST test

  LED10     Green        Blinking (1      checking for software download
                        times/sec.)

  LED10     Green        Blinking (8       loading NETserver application
                        times/sec.)                  into RAM

  LED10     Green            On                  normal operation

  LED11      Red             On                        POST

  LED11     Green            On                Erasing flash memory

  LED11     Amber            On             Programming flash memmory

  LED11      Off            Off                       Normal

  LED12      Red             On                 Interface failure

  LED12     Green            On                Transmitting packet

  LED12      Off            Off                        Idle

  LED13      Red             On                 Interface failure

  LED13     Green            On                  Receiving packet

  LED13      Off            Off                        Idle

  LED14      Red          Blinking            Collision (1 blink per
                                                    collision)

  LED14     Green            On              10 base-T link detected

  LED14      Off            Off            10 base-2 link connection (If
                                           10 base-T is being used, this
                                              indicates a bad link)

  LED15     Green         Blinking               Characters being
                                           received/transmitted through
                                                   serial port

  LED15      Off            Off                  Serial port idle

                       SUPPORTED COMMAND SET

                         Basic AT Commands

  AT, +++, A/

  A, B, C, E, F, O, V

  &C, &G, &W, &Z

                            S Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S26

  Note: See MHI Help File for full command documentation.

















                         Proprietary AT Command Set

                                   HELP

  Type:           Configuration

  Format:         AT [cmds] #$ [cmds]

  Description:    Display the help pannels for the octothorpe (#) command
                  set

                          ADDITIONAL RESULT CODES

  Type:                Configuration

  Format:              AT [cmds] &An [cmds]

  Description:         Controls the display of the additional result
                       codes

       Command                              Function

         &A0           Do not display ARQ result codes

         &A1           Display ARQ result codes

         &A2           Display ARQ result codes, HST, V.32, V.FC or V.34
                       modulation indicator

         &A3           Display ARQ result codes and error control
                       indicator LAPM, HST, MNP, SYNC, or NONE

                              BREAK HANDLING

  Type:          Configuration

  Format:        AT [cmds] &Yn [cmds]

  Description:   Controls the break handling

    Command                              Function

      &Y0        Destructive, dont send break

      &Y1        Destructive, expedited break sent

      &Y2        Nondestructive, expedited break sent

      &Y3        Nondestructive un-expedited break sent









































                              CONNECTION RATE

  Type:          Configuration

  Format:        AT [cmds] &Nn [cmds]

  Description:   Controls the connection rate

    Command                              Function

      &N0        Variable rate

      &N1        300bps

      &N2        1200bps

      &N3        2400bps

      &N4        4800bps

      &N5        7200bps

      &N6        9600bps

      &N7        12Kbps

      &N8        14.4Kbps

      &N9        16.8Kbps

      &N10       19.2Kbps

      &N11       21.6Kbps

      &N12       24Kbps

      &N13       26.4Kbps

      &N14       28.8Kbps

      &N15       31.2Kbps

      &N16       33.6Kbps

                             DATA COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] &Kn [cmds]

  Description:   Controls the data compression

    Command                              Function

      &K0        Data compression disabled

      &K1        Use auto enable/disable data compression

      &K2        Data compression always enabled

      &K3        Selective data compression

                           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

      &S2        DSR and CTS follows CD when carrier is lost

      &S3        DSR follows CD when carrier is lost

      &S4        Send the computer a DSR signal at the same time as the
                 CD

      &S5        Send DSR normally, and follow CTS with CD







                         DATA TERMINAL READY (DTR)

  Type:                  Configuration

  Format:                AT [cmds] &Dn [cmds]

  Description:           Selects modem response to DTR

            Note: The action each variant of &D causes depends on the
            setting of &Q

        Command                              Function

          &D0            Modem does not respond to DTR

          &D1            Modem goes to command mode after DTR goes is off

          &D2            Modem goes to command mode and disconnects
                         (hangs up) after DTR goes off; Auto-Answer is
                         disabled.

                                   DIAL

  Type:                  Immediate

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

  Description:           Dials telephone number according to any
                         modifiers included in the string

  Note:                  Any combination of modifiers can be used to
                         produce the desired dial functions in sequence.

        Command                              Function

          DL             Re-dial last number

          DP             Pulse dialing enabled

          DR             Reverse frequencies.

         DS=n            Dial stored telephone number n

          DT             Tone dialing enabled/Pulse dialing disabled

          DW             Dialing resumed following dial tone detection

          D,             Dialing paused for amount of time specified in
                         S8 register

        D"WXY"           Optional method of denoting telephone numbers.
                         Letters enclosed in quotes are interpreted as
                         numbers according to the system found on a
                         telephone keypad.

          D@             Wait for Quite Answer function enabled. Modem
                         waits until a "quiet answer," a ring-back signal
                         followed by silence up to the time specified in
                         S7, is received prior to executing the rest of
                         the dial string.

          D$             Wait for prompt tone detection function enabled.
                         Waits for prompt tone for amount of time
                         specified by the S7 command.

          D;             Modem returned to idle state after dialing. The
                         semicolon can only be placed at the end of the
                         dial command.

          D"             Dial the letters that follow

          D/             Pause for 125 milliseconds

                               ERROR CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Description:   Selects the error control protocol

    Command                                Mode

      &M0        Normal mode, no error control

      &M1        Online synchronous mode

      &M4        Normal/ARQ mode,

      &M5        ARQ asynchronous mode

      &M6        V.25bis synchronous mode.

      &M7        V.25bis synchronous mode using HDLC link protocol

                          FACTORY DEFAULT PROFILE

  Type:             Configuration

  Format:           AT [cmds] &F [cmds]

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

     Command                              Function

       &F0          Load No Flow Control template settings

       &F1          Load Hardware Flow Control template settings

       &F2          Load Software Flow Control template settings

                              HARDWARE RESET

  Type:                  Immediate

  Format:                AT [cmds] Z! [cmds]

  Description:           If SW1/1 is on, then revert to the settings in
                         NVRAM. If SW1/1 is off, reset to the &F0
                         configuration template

                                   HELP

  Type:          Immediate

  Format:        AT [cmds] $

  Description:   Display help screens for the AT basic command set

    Command                              Function

       &$        Display help screens for the & command set

       *$        Display help screens for the * command set

                               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)

                                MODEM CLOCK

  Type:                  Configuration

  Format:                AT [cmds] Kn [cmds]

  Description:           Controls the modem clock

        Command                              Function

          K0             If on-line, display current call duration; if
                         off-line, display the last calls duration

          K1             Display the actual time (set clock using
                         ATI3=HH:MM:SS K1)

                         RECEIVE DATA FLOW CONTROL

  Type:                  Configuration

  Format:                AT [cmds] &In [cmds]

  Description:           Controls the receive data flow control

        Command                             Jack Type

          &I0            Disables XON/XOFF flow control

          &I1            Modem acts on typed XON/XOFF commands, Ctrl -S,
                         or Ctrl -Q and passes them to remote device

          &I2            Modem acts on typed XON/XOFF commands but
                         removes them from data stream

          &I3            Hewlett Packard host mode

          &I4            Hewlett Packard terminal mode

          &I5            Enable flow control on the phone link when the
                         connection is not under error control

                        REPEAT LAST ISSUED COMMAND

  Type:           Immediate

  Format:         A>

  Description:    Repeats last issued command until any key is pressed

            Note: Do not precede this command with AT, or follow it with
            <CR>.

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0        Reports 4 digit product code

       I1        Reports results of ROM checksum

       I2        Reports results of RAM test

       I3        Reports the product name

       I4        Reports the current modem settings

       I5        Reports the settings stored in NVRAM

       I6        Reports statistics for the last call

       I7        Reports product configuration

      I10        Reports dial security account status information

      I11        Displays high speed connection report

      I12        Reports ISDN settings

                               RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] Qn [cmds]

  Description:   Enables modem to send result codes to the DTE

    Command                              Function

       Q0        Result code sending enabled

       Q1        Result code sending disabled

       Q2        Suppress result codes when answering

                                  RTS/CTS

  Type:           Configuration

  Format:         AT [cmds] &Rn [cmds]

  Description:    Selects RTS/CTS options

    Command                              Function

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

      &R1         CTS forced high, RTS is ignored.

      &R2         Enable hardware flow control of received data

                     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 enabled.

           X2            Busy tone detection disabled, dial tone
                         detection enabled; result codes 0 - 6 & 10
                         enabled.

           X3            Busy tone detection enabled, dial tone detection
                         disabled; result codes 0 - 5, 7 & 10 enabled.

           X4            Busy and dial tone detection enabled; result
                         codes 0 - 7 & 10 enabled.

           X5            Busy tone detection enabled, dial tone detection
                         disabled, all result codes enabled

           X6            All result codes enabled

           X7            Voice detection disabled, all result codes
                         enabled

                             SERIAL PORT RATE

  Type:                Configuration

  Format:              AT [cmds] &Bn [cmds]

  Description:         Controls the serial port rate

       Command                              Function

         &B0           Variable serial port rate

         &B1           Fixed serial port rate

         &B2           In answer mode use fixed rate for ARQ calls and
                       variable rate for non ARQ calls.

                              SOFTWARE RESET

  Type:                  Immediate

  Format:                AT [cmds] Z [cmds]

  Description:           If SW1/1 is set to on, revert to the settings in
                         NVRAM. If SW1/1 is set to off, reset to the &F0
                         configuration template

                                TEST MODES

  Type:          Immediate

  Format:        AT [cmds] &Tn

  Description:   Selects test options

    Command                              Function

      &T0        End current test

      &T3        Begin local digital loopback

      &T4        Grant remote digital loopback request

      &T5        Deny remote digital loopback request

      &T6        Request remote digital loopback

      &T7        Request remote digital loopback and self-test

                        TRANSMIT DATA FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Hn [cmds]

  Description:   Controls the transmit data flow

    Command                              Function

      &H0        Flow control disabled

      &H1        Use hardware flow control enabled

      &H2        Use software flow control enabled

      &H3        Use both hardware and software flow control enabled

                            Extended AT Commands

                              ASSIGN PASSWORD

  Type:          Immediate

  Format:        AT [cmds] %V=PWn [cmds]

  Description:   Assign the password in account n in security account

                                 CALL TYPE

  Type:          Configuration

  Format:        AT [cmds] *Vn [cmds]

  Description:   Set the call type for each B-channel

    Command                              Function

      *V0        0-5 for B-channel 1

      *V1        0-5 for B-channel 2

                             DIRECTORY NUMBER

  Type:               Configuration

  Format:             AT [cmds] *Pn [cmds]

  Description:        Set the directory number that was assigned to you
                      by your telephone company

      Command                              Function

        *P1           The DN for B-channel 1

        *P2           The DN for B-channel 2

                          ERASE SECURITY SETTINGS

  Type:            Configuration

  Format:          AT [cmds] %En [cmds]

  Description:     Erases selected security settings

     Command                             Function

       %E1         Erase local access password

       %E2         Erase autopass password

       %E3         Erase passwords in accounts 0-9

       %E4         Erase phone numbers in accounts 0-9

       %E5         Disable account, dialback, and new number fields in
                   accouns 0-9

                           LOCAL ACCESS PASSWORD

  Type:          Configuration

  Format:        AT [cmds] %Ln [cmds]

  Description:   Set local access password

                             PASSWORD SECURITY

  Type:          Immediate

  Format:        AT [cmds] %P [cmds]

  Description:   Disable password security

                         POINT TO POINT SELECTION

  Type:          Configuration

  Format:        AT [cmds] *Mn [cmds]

  Description:   Select point to point or multipoint

    Command                              Function

      *M0        Point to point

      *M1        Multipoint

                           REMOTE CONFIGURATION

  Type:             Configuration

  Format:           AT [cmds] %Cn [cmds]

  Description:      Controls the remote configuration

     Command                              Function

       %C0          Defer configuration changes until the call is ended

       %C1          Cancel configuration changes and restore the original
                    configuration

       %C2          Force configuration changes to take effect
                    immediately

                           REMOTE CONFIGURATION

  Type:          Configuration

  Format:        AT [cmds] %Fn [cmds]

  Description:   Configure another devices data remotely

    Command                              Function

      %F0        No parity, 8 data bits

      %F1        Mark parity, 7 data bits

      %F2        Odd parity, 7 data bits

      %F3        Even parity, 7 data bits

                             SECURITY ACCOUNTS

  Type:          Configuration

  Format:        AT [cmds] %An [cmds]

  Description:   Create and configure security accounts

                             SECURITY ACCOUNTS

  Type:          Configuration

  Format:        AT [cmds] %Sn [cmds]

  Description:   Access security accounts

                             SERIAL PORT RATE

  Type:          Configuration

  Format:        AT [cmds] %Bn [cmds]

  Description:   Remotely configure a modems serial port rate

    Command                              Function

      %B0        110bps

      %B1        300bps

      %B2        600bps

      %B3        1200bps

      %B4        2400bps

      %B5        4800bps

      %B6        9600bps

      %B7        19200bps

      %B8        38400bps

      %B9        57600bps

      %B10       115200bps

                            SERVICE PROFILE ID

  Type:          Configuration

  Format:        AT [cmds] *Sn [cmds]

  Description:   Set the service profile ID

    Command                              Function

      *S1        the SPID for B-channel 1

      *S2        The SPID for B-channel 2

                              SWITCH PROTOCOL

  Type:             Configuration

  Format:           AT [cmds] *Wn [cmds]

  Description:      Set the switch protocol used at the telephone
                    companys central office

      Command                             Jack Type

        *W0         AT&T 5ESS Custom

        *W1         Northern Telecom DMS-100

        *W2         National ISDN-1

        *W3         National ISDN-2

                           TERMINAL ENDPOINT ID

  Type:          Configuration

  Format:        AT [cmds] *T [cmds]

  Description:   Sets the terminal endpoint (TEI)

    Command                              Function

      *T1        0-63 for B-channel 1

      *T2        0-63 for B-channel 2

                             TONE FREQUENCIES

  Type:          Configuration

  Format:        AT [cmds] %Tn [cmds]

  Description:   Enalbes recognition of the tone frequencies

                            S(status) -REGISTERS

                            BIT MAPPED REGISTER

  Type:                  Register

  Format:                AT [cmds] S15=n [cmds]

  Unit:                  Bit-mapped

  Description:           Controls fallback

    Bit       Value                          Function

     0              1    Disable the modems extra high frequency
                         equalization if it causes problems on shorter
                         -link calls- for HST modulation only

     1              2    Disable online fallback

     2              4    Disable 450bps back channel ---HST only

     3              8    Reset non-ARQ mode transmit buffer from
                         1.5Kbytes to 128

     4             16    Disable MNP level 4

     5             32    Set backspace key to delete

     6             64    Alternate MNP setting for some 2400bps MNP
                         modems not made by U.S. Robotics of Microcom.

     7            128    Custom applications only

                          BIT MAPPED REGISTER S16

  Type:            Register

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

  Unit:            Bit-mapped

  Description:     Controls loopback tests and test pattern

   Bit    Value                           Function

    2         4    Test pattern

    3         8    Remote digital loopback

                          BIT MAPPED REGISTER S53

  Type:                 Register

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

  Description:      Bit mapped register

     Bit        Value                       Function

      0             1   Dial security enabled

      1             2   Prompting enabled

      2             4   Local access password protection enabled

                          BIT MAPPED REGISTER S54

  Type:                 Register

  Format:           AT [cmds] S54=n [cmds]

  Description:      Bit mapped register

     Bit        Value                       Function

      0             1   Disable 2400 symbol rate

      1             2   Disable 2743 symbol rate

      2             4   Disable 2800 symbol rate

      3             8   Disable 3000 symbol rate

      4            16   Disable 3200 symbol rate

      5            32   Disable 3429 symbol rate

      6            64   Disable Call Indicate

      7           128   Disable V.8

                          BIT-MAPPED REGISTER S13

  Format:             AT [cmds] S13=n [cmds]

  Default:            170

  Range:              0-174

  Unit:               Bit-mapped

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

   Bit       Value                         Function

    0             1   Reset when DTR drops

    1             2   Reverse normal auto answer mode

    2             4   Disable 250 msec pause before result code display

    3             8   On DTR signal, Autodial the number stored in NVRAM
                      at position 0

    4            16   At power on/reset, auto dial number stored in NVRAM
                      at position 0

    5            32   Disable HST

    6            64   Disable MNP level 3

    7           128   Hardware reset

                          BIT-MAPPED REGISTER S14

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

  Default:            170

  Range:              0-174

  Unit:               Bit-mapped

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

   Bit       Value                         Function

    0             1   Disconnect on escape code

    1             2   Send result codes only when originating a call

                          BIT-MAPPED REGISTER S28

  Format               AT [cmds] S28=n [cmds]

  Default:             Unidentified

  Range:               8

  Unit:                .1 second

  Description:         Sets the duration of the extra 3000/600 Hz answer
                       tones sent during handshaking.

                          BITMAPPED REGISTER S27

  Format            AT [cmds] S27=n [cmds]

  Default:          Unidentified

  Range:            0

  Unit:             Bit-mapped

  Description:      Selects modulation

   Bit     Value                          Function

    0          1    Enable ITU-T V.21

    1          2    Enable unencoded modulation in V.32 mode

    2          4    Disable V.32 modulation

    3          8    Disabl;e 2100Hz answer tone

    4           0   Complete handshaking sequence:V.42 detection, LAPM
                    error control, MNP
               16
                    Disable MNP
                0
                    Disable V.42 detection and LAPM
              16
                    Disable detection phase

    5           0   Complete handshaking sequence:V.42 detection, LAPM
                    error control, MNP
                0
                    Disable MNP
               32
                    Disable V.42 detection and LAPM
              32
                    Disable detection phase

    7        128    Unusual software incompatibility

                          BITMAPPED REGISTER S29

  Type:          Register

  Format         AT [cmds] S29=n [cmds]

  Default:       20

  Range:         Unidentified

  Unit:          .1 sec

  Description:   Sets the duration of the V.21 answer tone

                          BIT-MAPPED REGISTER S34

  Type:                Register

  Format:              AT [cmds] S34n [cmds]

  Default:             0

  Range:               Unidentified

  Unit:                Unidentified

  Description:         Controls V.32bis

    Bit      Value                          Function

     0            1    Disable V.32bis

     1            2    Disable modems enhanced proprietary V.32bis
                       modulation

     2            4    Disable the faster retrains that occure during
                       proprietary V.32terbo modulation

     3            8    Enable V.23

     4           16    Force the MR LED to show DSR

     5           32    Enable MI/MIC

     6           64    Disable the remote access busy message

     7          128    Disable V.32terbo

                          BIT-MAPPED REGISTER S51

  Format           AT [cmds] S51=n [cmds]

  Default:         0

  Range:           Unidentified

  Unit:            Bit-mapped

  Description:     MNP/V.42 control

   Bit    Value                           Function

    0         1    Disable MNP/V.42 for V.22

    1         2    Disable MNP/V.42 for V.22bis

    2         4    Disable MNP/V.42 for V.32/V.32bis/V.32terbo

    6        64    Disable selective reject

    7       128    Enable handset exclusion delay

                          BIT-MAPPED REGISTER S55

  Type:            Register

  Format           AT [cmds] S55=n [cmds]

  Description:     Bit-mapped register

   Bit    Value                           Function

    0         1    Disable 8S-2D mapping

    1         2    Disable 16S-4D mapping

    2         4    Disable 32S-2D mapping

    3         8    Disable 64S-4D mapping

    7       128    Enable phase roll detection

                          BIT-MAPPED REGISTER S56

  Type:            Register

  Format           AT [cmds] S56 [cmds]

  Description:     Bit-mapped register

   Bit    Value                           Function

    0         1    Disable non-linear coding

    1         2    Disable TX level deviation

    2         4    Disable pre-emphasis

    3         8    Disable precoding

    4        16    Disable shaping

    5        32    Disable 31.2 and 33.6 speeds in V.34

    6        64    Disable V.34

    7       128    Disable V.FC

                          BIT-MAPPED REGISTER S69

  Type:            Register

  Format:          AT [cmds] S69=n [cmds]

  Description:     Bit-mapped register

   Bit    Value                           Function

    0         1    Disable plug and play signaling

    1         2    Enable carrier loss redial

                          BIT-MAPPED REGISTER S70

  Type             Register or Configuration

  Format           AT [cmds] S70=n [cmds]

  Description      Bit-mapped register

   Bit    Value                           Function

    0         1    Enable recognition of Ring A

    1         2    Enable recognition of Ring B

    2         4    Enable recognition of Ring C

    3         8    Enable recognition of Ring D

                               BREAK LENGTH

  Format              AT [cmds] S21=n [cmds]

  Default:            Unidentified

  Range:              Unidentified

  Unit:               10msec

  Description:        Sets the duration of breaks sent from the modem to
                      the computer or terminal

                              DSR RECOGNITION

  Type:          Register

  Format         AT [cmds] S25=n [cmds]

  Default:       5

  Range:         Unidentified

  Unit:          .1 second

  Description:   Sets DTR recognition time

                                DSR SIGNAL

  Type:                Register

  Format               AT [cmds] S24=n [cmds]

  Default:             150

  Range:               Unidentified

  Unit:                .02 sec

  Description:         Sets the duration between pulsed DSR signals when
                       the modem is set to &S2 or &S3.

                       FLOW CONTROL CHARACTER - XOFF

  Format         AT [cmds] S23=n [cmds]

  Default:       19

  Range:         Unidentified

  Description:   Stores the ASCII code for the XOFF character

                            GUARD TIME DURATION

  Type:            Register

  Format           AT [cmds] S43=n [cmds]

  Default:         200

  Unit:            .02 sec

  Description:     Sets the duration of the guard time for the remote
                   access sequence

                             INACTIVITY TIMER

  Type:                Register

  Format               AT [cmds] S19=n [cmds]

  Default:             Unidentified

  Range:               Unidentified

  Unit:                Minute

  Description:         Sets the duration in minutes for the inactivity
                       timer, S19=0 disables the timer

                    REESTABLISHING CONNECTION INTERVAL

  Format                 AT [cmds] S44=n [cmds]

  Default:               15

  Description:           Sets the duration of the interval between losing
                         carrier and reestablishing a connection

                               REMOTE ACCESS

  Type:                   Register

  Format                  AT [cmds] S41=n [cmds]

  Description:            Sets the number of allowable remote access
                          login attempts, thus enabling or disabling
                          remote access.

                      REMOTE ACCESS ESCAPE CHARACTER

  Type:             Register

  Format            AT [cmds] S42=n [cmds]

  Default:          126

  Range:            Unidentified

  Unit:             Unidentified

  Description:      Stores the ASCII decimal code for the remote access
                    escape character.

                              TRANSMIT BUFFER

  Type:                   Register

  Format                  AT [cmds] S38n [cmds]

  Description:            Sets the time before a forced hang up and
                          clearing of the transmit buffer when DTR drops
                          during an ARQ call.

                             VOICE/DATA SWITCH

  Type:          Register

  Format         AT [cmds] S32=n [cmds]

  Default:       9

  Range:         Unidentified

  Unit:          Unidentified

  Description:   Assign voice/data switch function

     Value                               Function

       0         Disabled

       1         Voice/data - originate mode

       2         Voice/data - answer mode

       3         Radial last number

       4         Dial number stored at position 0

       5         Auto answer on/off toggle

       6         Reset modem

       7         Initiate remote digital loopback

       8         Busy out the phone line toggle

       9         Execute stored command

                               XON CHARACTER

  Format         AT [cmds] S22=n [cmds]

  Default:       17

  Range:         Unidentified

  Unit:          Bit-mapped

  Description:   Stores the ASCII code for XON character

