
3COM CORPORATION

US ROBOTICS MP/8 WITH SNMP

Card Type                     Modem (asynchronous)
Chip Set                      Unidentified
I/O Options                   RJ-11 jacks(8), RJ-45 jacks(10), serial port
Maximum Modem Rate            33.6Kbps
Maximum Fax Rate              14.4Kbps
Data Modulation Protocol      Bell 103/212A

                              ITU-T V.34, V.FC, V.32terbo, V.32bis, V.32,
                              V.25, V.23, V.22bis
Fax Modulation Protocol       Unidentified
Error Correction/Compression  MNP5, V.42, V.42bis, V.54
Fax Class                     Class I & II
Data Bus                      External

[Image]

                                CONNECTIONS

        Function           Label             Function              Label

  DC power                      CN1     Unidentified                CN12

  RJ-11 jack channel 1          CN3     Unidentified                CN13

  RJ-11 jack channel 2          CN4     RJ-45 channel 1             CN14

  RJ-11 jack channel 3          CN5     RJ-45 channel 2             CN15

  RJ-11 jack channel 4          CN6     RJ-45 channel 3             CN16

  RJ-11 jack channel 5          CN7     RJ-45 channel 4             CN17

  RJ-11 jack channel 6          CN8     RJ-45 channel 5             CN18

  RJ-11 jack channel 7          CN9     RJ-45 channel 6             CN19

  RJ-11 jack channel 8         CN10     RJ-45 channel 7             CN20

  Unidentified                 CN11     RJ-45 channel 8             CN21























                        USER CONFIGURABLE SETTINGS

                  Setting                        Label        Position

  Power on                                        SW1            On

  Power off                                       SW1            Off

  DTR always on                                  SW2/1           On

  DTR normal operation                           SW2/1           Off

  Numeric result codes                           SW2/2           On

  Verbal result codes                            SW2/2           Off

  Result codes displayed                         SW2/3           On

  Result codes suppressed                        SW2/3           Off

  Command mode local echo disabled               SW2/4           On

  Command mode local echo enabled                SW2/4           Off

  Auto answer disabled                           SW2/5           On

  Auto answer enabled                            SW2/5           Off

  Carrier detect always on                       SW2/6           On

  Normal carrier detect operations               SW2/6           Off

  Result codes in originate mode only            SW2/7           On

  Result codes in originate and answer mode      SW2/7           Off

  Command set recognition enabled                SW2/8           On

  Command set recognition disabled               SW2/8           Off

  Modem maintains connection, returns to         SW2/9           On
  command mode

  Modem hangs up, returns to command mode        SW2/9           Off

  Load factory settings from ROM                SW2/10           On

  Load factory settings from NVRAM              SW2/10           Off

  Factory set - do not alter                  SW3/1 - 10    Unidentified















































                             DIAGNOSTIC LED(S)

   LED         Color              Status                Condition

  LED1      Unidentified       Unidentified      Unit operating normally

  LED1      Unidentified       Unidentified         Unit not operating
                                                         normally

  LED2          Off                Off                Channel 1 idle

  LED2         Amber            Blinking (8       Channel 1 looking for U
                               times/sec.)              interface

  LED2         Amber            Blinking (1        Channel 1 looking for
                               times/sec.)            S/T interface

  LED2         Amber                On            Channel 1 negotiating

  LED2         Green             Blinking           Channel 1 U and S/T
                                                     interfaces found;
                                                    waiting for line to
                                                      become active

  LED2         Green                On           Channel 1 Connection OK

  LED2          Red                 On             Channel 1 U interface
                                                        not found

  LED2          Red             Blinking (1      Channel 1 incorrect SPID
                               times/sec.)

  LED3          Off                Off                Channel 2 idle

  LED3         Amber            Blinking (8       Channel 2 looking for U
                               times/sec.)              interface

  LED3         Amber            Blinking (1        Channel 2 looking for
                               times/sec.)            S/T interface

  LED3         Amber                On            Channel 2 negotiating

  LED3         Green             Blinking           Channel 2 U and S/T
                                                     interfaces found;
                                                    waiting for line to
                                                      become active

  LED3         Green                On           Channel 2 Connection OK

  LED3          Red                 On             Channel 2 U interface
                                                        not found

  LED3          Red             Blinking (1      Channel 2 incorrect SPID
                               times/sec.)

  LED4          Off                Off                Channel 3 idle

  LED4         Amber            Blinking (8       Channel 3 looking for U
                               times/sec.)              interface

  LED4         Amber            Blinking (1        Channel 3 looking for
                               times/sec.)            S/T interface

  LED4         Amber                On            Channel 3 negotiating

  LED4         Green             Blinking           Channel 3 U and S/T
                                                     interfaces found;
                                                    waiting for line to
                                                      become active

  LED4         Green                On           Channel 3 Connection OK

  LED4          Red                 On             Channel 3 U interface
                                                        not found

  LED4          Red             Blinking (1      Channel 3 incorrect SPID
                               times/sec.)

  LED5          Off                Off                Channel 4 idle

  LED5         Amber            Blinking (8       Channel 4 looking for U
                               times/sec.)              interface

  LED5         Amber            Blinking (1        Channel 4 looking for
                               times/sec.)            S/T interface

  LED5         Amber                On            Channel 4 negotiating

  LED5         Green             Blinking           Channel 4 U and S/T
                                                     interfaces found;
                                                    waiting for line to
                                                      become active

  LED5         Green                On           Channel 4 Connection OK

  LED5          Red                 On             Channel 4 U interface
                                                        not found

  LED5          Red             Blinking (1      Channel 4 incorrect SPID
                               times/sec.)

                         DIAGNOSTIC LED(S) (CONT)

   LED       Color           Status                   Condition

  LED6        Off              Off                  Channel 5 idle

  LED6       Amber         Blinking (8          Channel 5 looking for U
                           times/sec.)                interface

  LED6       Amber         Blinking (1         Channel 5 looking for S/T
                           times/sec.)                interface

  LED6       Green          Blinking            Channel 5 negotiating

  LED6       Green             On                 Channel 5 U and S/T
                                               interfaces found; waiting
                                              for line to become active

  LED6       Amber             On              Channel 5 Connection OK

  LED6        Red              On              Channel 5 U interface not
                                                        found

  LED6        Red          Blinking (1         Channel 5 incorrect SPID
                           times/sec.)

  LED7        Off              Off                  Channel 6 idle

  LED7       Amber         Blinking (8          Channel 6 looking for U
                           times/sec.)                interface

  LED7       Amber         Blinking (1         Channel 6 looking for S/T
                           times/sec.)                interface

  LED7       Green          Blinking              Channel 6 U and S/T
                                               interfaces found; waiting
                                              for line to become active

  LED7       Green             On              Channel 6 Connection OK

  LED7       Amber             On               Channel 6 negotiating

  LED7        Red              On              Channel 6 U interface not
                                                        found

  LED7        Red          Blinking (1         Channel 6 incorrect SPID
                           times/sec.)

  LED8        Off              Off                  Channel 7 idle

  LED8       Amber         Blinking (8          Channel 7 looking for U
                           times/sec.)                interface

  LED8       Amber         Blinking (1         Channel 7 looking for S/T
                           times/sec.)                interface

  LED8       Green          Blinking              Channel 7 U and S/T
                                               interfaces found; waiting
                                              for line to become active

  LED8       Green             On              Channel 7 Connection OK

  LED8       Amber             On               Channel 7 negotiating

  LED8        Red              On              Channel 7 U interface not
                                                        found

  LED8        Red          Blinking (1         Channel 7 incorrect SPID
                           times/sec.)

  LED9        Off              Off                  Channel 8 idle

  LED9       Amber         Blinking (8          Channel 8 looking for U
                           times/sec.)                interface

  LED9       Amber         Blinking (1         Channel 8 looking for S/T
                           times/sec.)                interface

  LED9       Green          Blinking              Channel 8 U and S/T
                                               interfaces found; waiting
                                              for line to become active

  LED9       Green             On              Channel 8 Connection OK

  LED9       Amber             On               Channel 8 negotiating

  LED9        Red              On              Channel 8 U interface not
                                                        found

  LED9        Red          Blinking (1         Channel 8 incorrect SPID
                           times/sec.)



                       SUPPORTED COMMAND SET

                         Basic AT Commands

  AT, +++, A/

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

  &C, &G, &L, &X, &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:          Immediate

  Format:        AT [cmds] $ [cmds]

  Description:   Displays the help screen

                            REPEAT LAST COMMAND

  Type:          Immediate

  Format:        AT [cmds] A> [cmds]

  Description:   Repeat last command until canceled by pressing any key.

                                   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             Answer mode enabled; originate mode disabled
                         following handshake initiation.

         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!             Flash function initiated. Modem commanded to go
                         off-hook for specified time before returning
                         on-hook.

          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

















                            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

      I15        Reports caller ID information

                                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)

                              SPEAKER VOLUME

  Type:          Configuration

  Format:        AT [cmds] Ln [cmds]

  Description:   Controls speaker volume

    Command                              Function

       L0        Low volume setting

       L1        Low volume setting

       L2        Medium volume setting

       L3        Highest volume setting



                               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







                     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

                                   RESET

  Type:                  Configuration

  Format:                AT [cmds] &Zn [cmds]

  Description:           Reset the modem. If SW2/10 is set to off, revert
                         to the settings in NVRAM. If SW2/10 is set to
                         on, reset to the &F0 configuration template.

                          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

                             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.

                         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.

                          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

                        TRANSMIT DATA FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Hn [cmds]

  Description:   Controls the transmit data flow

    Command                              Function

      &H0        Flow control disabled

      &H1        Hardware flow control enabled

      &H2        Software flow control enabled

      &H3        Hardware and software flow control enabled

                         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

                             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

                               ERROR CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Description:   Selects the error control protocol

    Command                                Mode

      &M0        Normal mode, no error control

      &M4        Normal/ARQ mode

      &M5        ARQ asynchronous mode

      &M6        V.25bis synchronous mode

                              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

                            PULSE DIALING RATIO

  Type:          Configuration

  Format:        AT [cmds] &Pn [cmds]

  Description:   Selects pulse dial make/break ratio

    Command                              Function

      &P0        39/61ms at 10pps (North America)

      &P1        33/67ms at 10pps (Europe)

                                  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

                           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 & 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

                                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

                           STORE ACTIVE PROFILE

  Type:            Configuration

  Format:          AT [cmds] &Wn [cmds]

  Description:     Writes the values for the active profile into the
                   non-volatile RAM

                              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

                           STORE COMMAND STRING

  Type:              Configuration

  Format:            AT [cmds] &ZCn=(phone # & modifiers)

  Description:       Writes selected command string into the non-volatile
                     memory at location n

            Note: The command string can be up to 30 characters long;
            spaces do not count.

                             SECURITY ACCOUNTS

  Type:          Configuration

  Format:        AT [cmds] %An [cmds]

  Description:   Create and configure 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

                           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



                          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
                   accounts 0-9

                           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

                           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

                             SECURITY ACCOUNTS

  Type:          Configuration

  Format:        AT [cmds] %Sn [cmds]

  Description:   Access security accounts

                             TONE FREQUENCIES

  Type:          Configuration

  Format:        AT [cmds] %Tn [cmds]

  Description:   Enalbes recognition of the tone frequencies

                              ASSIGN PASSWORD

  Type:              Immediate

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

  Description:       Assign the password in account n in security account
                     as autopass password



                                   HELP

  Type:           Configuration

  Format:         AT [cmds] #$ [cmds]

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

                                 CALLER ID

  Type:            Configuration

  Format:          AT [cmds] #CID=n [cmds]

  Description:     Controls the Caller ID function

     Command                              Function

     #CID=0        Caller ID disabled

     #CID=1        Caller ID displays formatted data

     #CID=2        Caller ID displays raw hexadecimal data

     #CID=3        Enable caller ID with formatted output and name
                   suppressed

     #CID=4        Enable caller ID but do not transmit the information
                   to computer

                            S(status) -REGISTERS

                          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

  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 or 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

                             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

                               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

                               XON CHARACTER

  Format         AT [cmds] S22=n [cmds]

  Default:       17

  Range:         Unidentified

  Unit:          ASCII

  Description:   Stores the ASCII code for XON character

                       FLOW CONTROL CHARACTER - XOFF

  Format         AT [cmds] S23=n [cmds]

  Default:       19

  Range:         Unidentified

  Unit:          ASCII

  Description:   Stores the ASCII code for the XOFF character

                                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.

                              DSR RECOGNITION

  Type:          Register

  Format         AT [cmds] S25=n [cmds]

  Default:       5

  Range:         Unidentified

  Unit:          .1 second

  Description:   Sets DTR recognition time

                          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
               32
                    Disable V.42 detection and LAPM
              48
                    Disable detection phase

    5           0   Complete handshaking sequence:V.42 detection, LAPM
                    error control, MNP
               16
                    Disable MNP
               32
                    Disable V.42 detection and LAPM
              48
                    Disable detection phase

    7        128    Unusual software incompatibility

                          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 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

                             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

                          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

                              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.

                               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.

                            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

                    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

                          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 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 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

