
PHEONIX RESEARCH GROUP, INC.

331CAR

Card Type                    Modem
Chip Set                     Unidentified
I/O Options                  Line out, line in, microphone in, audio in,
                             speaker out,

                             game port
Maximum Modem Rate           33.6Kbps
Maximum Fax Rate             14.4Kbps
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.21, V.22, V.22bis, V.23, V.32,
                             V.32bis, V.34
Fax Modulation Protocol      ITU-T V.17, V.27ter, V.29
Error Correction/Compression MNP10, MNP5, V.42, V.42bis
Fax Class                    Unidentified
Data Bus                     16 -bit ISA

[Image]

                                CONNECTIONS

         Function           Label             Function             Label

  Line in (RJ-11)               CN1       Audio in                  CN4

  Line out (RJ-11)              CN2       Speaker out               CN5

  Microphone in                 CN3       Game/MIDI port            CN6

                           SUPPORTED COMMAND SET

                             Basic AT Commands

  AT, A/

  A, E, H, M, O, P, Q, T, V

  &C, &P, &R, &W, &Z

                           Extended AT Commands

  \A, \B, \N

  %C, %E

                                S Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S26,
  S28



                             Special Commands

  #CID

                              Voice Commands

  #SPK, #TL, #VBT, #VGT, #VRA, #VRN, #VRX, #VSD, #VSP, #VTD, #VTS, #VTX,

  Note: See MHI Help File for full command documentation.



                         Proprietary AT Command Set

                            AUTO-MODE DETECTION

  Type:                  Configuration

  Format:                AT [cmds] Nn [cmds]

  Description:           Selects various options for the automatic
                         detection and negotiation of protocols during
                         the handshake process if the modem is
                         communicating with a remote modem of dissimilar
                         speed.

        Command                              Function

          N0             Auto-mode detection disabled; handshake begins
                         at line speed designated by the S32 register.

          N1             Auto-mode detection enabled; handshake conducted
                         according to automode algorithm.

                          CONNECT MESSAGE FORMAT

  Type:                  Configuration

  Format:                AT [cmds] &An [cmds]

  Description:           Determines CONNECT message format

        Command                              Function

          &A0            Extended result codes disabled

          &A1            Modulation indicator added to CONNECT message

          &A2            Error detection protocol and data compression
                         indicator added CONNECT message

          &A3            Modulation indicator, error detection protocol
                         and data compression indicator added CONNECT
                         message

                                   CONNECT MESSAGE SPEED SOURCE

  Type:              Configuration

  Format:            AT [cmds] &En [cmds]

  Description:       Selects requested source for the speed field in the CONNECT message

      Command                                            Mode

        &E0           DCE speed source

        &E1           DTE speed source

                           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

                                     DATA TERMINAL READY (DTR)

  Type:              Configuration

  Format:            AT [cmds] &Dn [cmds]

  Description:       Selects modem response to DTR

      Command                                            Mode

        &D0           Ignore transition of DTR status

        &D1           Switch to command mode if DTR is low

        &D2           DTR follows DTR curcuit definition

        &D3           Reset on low DTR



                           DEFAULT CONFIGURATION

  Type:          Configuration

  Format:        AT [cmds] Yn [cmds]

  Description:   Selects default user defined configuration

    Command                              Function

       Y0        Select user template 0

       Y1        Select user template 1

       Y2        Select factory setting 0

       Y3        Select factory setting 1

                                   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

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

                                    DISPLAY AMPERSAND COMMANDS

  Type:               Immediate

  Format:             AT [cmds] &$ [cmds]

  Description:        Displays a list of all & commands

                                      FACTORY DEFAULT PROFILE

  Type:               Configuration

  Format:             AT [Cmds] &F [cmds]

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

      Command                                            Mode

        &F0           Select factory setting 0

        &F1           Select factory setting 1

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Hn [cmds]

  Description:   Enables flow control options

    Command                              Function

      &H0        Flow control disabled

      &H1        RTS to CTS flow control enabled



                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I1        Reports vendor

       I2        Reports hardware manufacturer and model information

       I3        Reports software manufacturer and model information

       I4        Reports data connection information

       I5        Reports data connection information

       I6        Reports data connection information

                     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 & 9 - 1212 enabled.

           X2            Busy tone detection disabled, dial tone
                         detection enabled; result codes 0 - 6 & 9 - 1212
                         enabled.

           X3            Busy tone detection enabled, dial tone detection
                         disabled; result codes 0 - 5, 7 - 1212 enabled.

           X4            Busy and dial tone detection enabled; result
                         codes 0 - 1212 enabled.

                              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

                                TEST MODES

  Type:          Immediate

  Format:        AT [cmds] &Tn

  Description:   Selects test options

    Command                              Function

      &T0        TBD

      &T1        TBD

      &T2        TBD

      &T3        TBD



                        USER DEFINED CONFIGURATION

  Type:          Immediate

  Format:        AT [cmds] Zn [cmds]

  Description:   Selects user defined configuration

    Command                              Function

       Z0        Restore default user template

       Z1        Restore user template 0

       Z2        Restore user template 1

       Z3        Restore factory setting 0

       Z4        Restore factory setting 1

                            EXTENDED AT COMMANDS

                                BREAK TYPE

  Type:           Configuration

  Format:         AT [cmds] \Kn [cmds]

  Description:    Configures action of break signal

    Command                              Function

      \K0        Online command mode enabled, send no break to remote
                 modem

      \K1        Break sent to remote modem and buffered cleared

      \K2        Online command mode enabled, send no break to remote
                 modem

      \K3        Send break to remote modem immediately

      \K4        Online command mode enabled, send no break to remote
                 modem

      \K5       Send break with transmitted data

                           MODULATION SELECTION

  Type:                  Configuration

  Format:                AT [cmds] +MS=x,y,z,a [cmds]

  Description:           Sets options for active protocol; the transfer
                         rates specified by z and a must be valid for the
                         protocol selected. +MS? queries settings

        Command                              Function

         x=21            V.21

         x=22            V.22

         x=34            V.34

         x=103           Bell 103

         x=122           V.22bis

         x=132           V.32bis

          y=0            Automode disabled

          y=1            Auto-detect highest speed enabled

       z, a=300          Set minimum or maximum transfer rate at 300bps,
                         respectively.

       z, a=1200         Set minimum or maximum transfer rate at 1200bps,
                         respectively.

       z, a=2400         Set minimum or maximum transfer rate at 2400bps,
                         respectively.

       z, a=4800         Set minimum or maximum transfer rate at 4800bps,
                         respectively.

       z, a=7200         Set minimum or maximum transfer rate at 7200bps,
                         respectively.

       z, a=9600         Set minimum or maximum transfer rate at 9600bps,
                         respectively.

      z, a=12000         Set minimum or maximum transfer rate at
                         12000bps, respectively.

      z, a=14400         Set minimum or maximum transfer rate at
                         14400bps, respectively.

      z, a=16800         Set minimum or maximum transfer rate at
                         16800bps, respectively.

      z, a=19200         Set minimum or maximum transfer rate at
                         19200bps, respectively.

      z, a=21600         Set minimum or maximum transfer rate at
                         21600bps, respectively.

      z, a=24000         Set minimum or maximum transfer rate at
                         24000bps, respectively.

      z, a=26400         Set minimum or maximum transfer rate at
                         26400bps, respectively.

      z, a=28800         Set minimum or maximum transfer rate at
                         28800bps, respectively.

      z, a=33600         Set minimum or maximum transfer rate at
                         33600bps, respectively.



                               VOICE COMMANDS

                              MODE SELECTION

  Type:          Immediate

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

  Description:   Selects which mode the modem will operate in.

    Command                              Function

     #CLS=0      Modem will operate in data mode.

     #CLS=1      Modem will operate in fax class I mode.

     #CLS=8      Modem will operate in voice mode.

                                RECORD GAIN

  Type:          Configuration

  Format:        AT [cmds] #RG=hhhh [cmds]

  Default:       7FFF

  Range:         0000 - 7FFF

  Unit:          Unidentified (hexadecimal)

  Description:   Sets the record gain. #RG? queries value

                      VOICE - LOCAL SERIAL PORT SPEED

  Type:           Configuration

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

  Range:          0-48

  Unit:           2400bps

  Description:    Sets the speed of the local serial port when in voice
                  mode.

                               VOICE DEVICE

  Type:          Configuration

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

  Description:   Selects the I/O device for the DSP chip.

    Command                              Function

     #VLS=0      Telephone line and handset used for voice I/O.

     #VLS=2      Internal speaker only used for voice I/O.

     #VLS=3      External microphone only used for voice I/O.

     #VLS=6      Speakerphone used for voice I/O.

                          VOICE INACTIVITY TIMER

  Type:                  Configuration

  Format                 AT [cmds] #VIT=n [cmds]

  Range:                 0-255

  Unit:                  1 ms

  Description:           Maximum duration of voice inactivity allowed
                         prior to initiating hang-up process.

            Note: #VIT=0 disables the timer and allows indefinite
            inactivity. #VIT? queries current setting. #VIT=? lists
            available options

                             VOICE PARAMETERS

  Type:          Configuration

  Format:        AT [cmds] #VIP [cmds]

  Description:   Initializes voice parameters



                                       VOICE SAMPLE QUALITY

  Type:               Configuration

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

  Description:        Selects the number of bits per sample that the modem records.

      Command                                          Function

       #VBS=2         Modem records 2 bits per sample in ADPCM encoding.

       #VBS=4         Modem records 4 bits per sample in ADPCM encoding.

       #VBS=8         Modem records 8 bits per sample in PCM encoding.

      #VBS=16         Modem records 16 bits per sample in PCM encoding.

                            VOICE SAMPLING RATE

  Type:                Configuration

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

  Description:         Sets the sampling rate used when recording voice
                       signals. #VSR? queries settings

       Command                              Function

      #VSR=7200        Selects a sampling rate of 7.2KHz.

      #VSR=8000        Selects a sampling rate of 8.0KHz.

     #VSR=11025        Selects a sampling rate of 11.025KHz.

                     VOICE SILENCE DETECTION THRESHOLD

  Type:                  Configuration

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

  Range:                 0 - 31

  Unit:                  Unidentified

  Description:           Sets the threshold of sensitivity that the modem
                         uses to determine silence detection. #VSS=0
                         disables. #VSS=31 allows for noisy conditions.
                         #VSS? queries current setting. #VSS=? Lists
                         available options

                             VOICE TIMING MARK

  Type:                  Configuration

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

  Range:                 0 - 10

  Unit:                  .1ms

  Description:           Configures timing mark placement. #VTM? queries
                         current setting. #VTM=? Lists available options

                            S(status) -REGISTERS

                               ACTUAL SPEED

  Type:           Register

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

  Description:    Selects actual line speed. Further information is
                  unavailable

                                       ADPCM BITS PER SAMPLE

  Type:          Register

  Format:        AT [cmds] S76=n [cmds]

  Description:   Selects bits per sample in ADPCM coding. Further information is unavailable



                         AUTO ANSWER CLEAR TIMEOUT

  Type:          Register

  Format         AT [cmds] S27=n [cmds]

  Range:         0-255

  Unit:          1 second

  Description:   Determines auto-answer clear timeout

                            AUTOMODE SELECTION

  Type:                   Register

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

  Description:            Selects automode options

        Command                              Function

         S31=0            Auto-mode detection disabled; handshake begins
                          at line speed designated by the S32 register.

         S31=1           Auto-mode detection enabled; handshake
                          conducted according to automode algorithm.

                 AUTO-RETRAIN - AUTO-FALLBACK/FALL-FORWARD

  Type:          Register

  Format:        AT [cmds] S39=n [cmds]

  Description:   Controls auto-retrain mode and fallback/fall-forward

    Command                              Function

     S39=0       Auto-retrain disabled

     S39=1       Auto-retrain enabled

     S39=2       Auto-fallback/fall-forward enabled

                              BEEP TONE TIMER

  Type:          Register

  Format         AT [cmds] S77=n [cmds]

  Range:         0-40

  Unit:          .1 second

  Description:   Determines the beep tone pulse duration.

                                BREAK SEND

  Type:          Register

  Format:        AT [cmds] S21=n [cmds]

  Range:         1-9

  Unit:          100ms

  Description:   Sends break to modem

                                             CALLER ID

  Type:          Register

  Format:        AT [cmds] S75=n [cmds]

  Description:   Enables caller ID function. Further information is unavailable

                                      CONNECT MESSAGE FORMAT

  Type:          Register

  Format:        AT [cmds] S70=n [cmds]

  Description:   Selects CONNECT message format. Further information is unavailable



                                   CONNECT MESSAGE SPEED SOURCE

  Type:          Register

  Format:        AT [cmds] S71=n [cmds]

  Description:   Selects CONNECT message speed source. Further information is unavailable

                               COUNTRY CODE

  Type:          Register

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

  Range:         0-7

  Description:   Selects county type. Further information is unavailable

                                        DATA CARRIER DETECT

  Type:          Register

  Format:        AT [cmds] S68=n [cmds]

  Description:   Selects DCD options. Further information is unavailable

                         DATA CARRIER DETECT (DCD)

  Type:          Register

  Format:        AT [cmds] S60=n [cmds]

  Description:   Selects whether the DCD option is enabled or disabled

    Command                              Function

     S60=0       DCD enabled

     S60=1       DCD enabled after carrier signal detected

                                          DATA SET READY

  Type:          Register

  Format:        AT [cmds] S63=n [cmds]

  Description:   Selects DSR options. Further information is unavailable

                                          DATA SET READY

  Type:          Register

  Format:        AT [cmds] S67=n [cmds]

  Description:   Selects DSR options. Further information is unavailable

                                     DATA TERMINAL READY (DTR)

  Type:          Register

  Format:        AT [cmds] S63=n [cmds]

  Description:   Selects modem response to DTR. Further information is unavailable

                              DEFAULT SETTING

  Type:           Register

  Format:         AT [cmds] S161=n [cmds]

  Range:          0-1

  Description:    Selects default setting. Further information is
                  unavailable

                                 ECHO MODE

  Type:          Register

  Format         AT [cmds] S13=n [cmds]

  Description:   Enables/disables echo mode

    Command                              Function

     S13=0       Echo mode disabled

     S13=1       Echo mode enabled



                           EXTENDED RESULT CODES

  Type:                 Register

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

  Description:          Determines extended result code sending options.
                        Further information is unavailable

                                          FACTORY PROFILE

  Type:               Register

  Format:             AT [cmds] S59=n [cmds]

  Description:        Returns current setting of factory profiles. Further information is
                      unavailable

                                 FAE VALUE

  Type:          Register

  Format:        AT [cmds] S151=n [cmds]

  Range:         0, 1

  Description:   Selects FAE value. Further information is unavailable

                               FCLASS VALUE

  Type:          Register

  Format:        AT [cmds] S150=n [cmds]

  Range:         0, 1, 8

  Description:   Selects FCLASS value. Further information is unavailable

                         FLASH DIAL MODIFIER TIME

  Type:                Register

  Format               AT [cmds] S24=n [cmds]

  Range:               0-255

  Unit:                .01 second

  Description:         Time the modem will go on-hook upon receiving the
                       ! dial modifier in dial string.

                               FLOW CONTROL

  Type:          Register

  Format:        AT [cmds] S62=n [cmds]

  Description:   Enables flow control options

    Command                              Function

     S62=0       Flow control disabled

     S62=1       RTS to CTS flow control enabled

                       FLOW CONTROL CHARACTER - XOFF

  Type:          Register

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

  Range:         0-255

  Unit:          ASCII

  Description:   Sets the character used to represent XOFF

                             INACTIVITY TIMER

  Type:                  Register

  Format                 AT [cmds] S19=n [cmds]

  Range:                 0-30

  Unit:                  1 minute

  Description:           Maximum duration of DTE and DCE inactivity
                         allowed prior to initiating hang-up process.

            Note: S30=0 disables the timer and allows indefinite
            inactivity.



                              LINE MODULATION

  Type:           Register

  Format:         AT [cmds] S37=n [cmds]

  Description:    Selects line modulation. Further information is
                  unavailable

                          LINE SELECTION DURATION

  Type:               Register

  Format              AT [cmds] S78=n [cmds]

  Range:              0, 2, 3, 6

  Unit:               Unidentified

  Description:        Determines the duration of line selection. Further
                      information is unavailable

                               MAXIMUM SPEED

  Type:           Register

  Format:         AT [cmds] S34=n [cmds]

  Description:    Selects maximum line speed. Further information is
                  unavailable

                               MINIMUM SPEED

  Type:           Register

  Format:         AT [cmds] S33=n [cmds]

  Description:    Selects minimum line speed. Further information is
                  unavailable

                             ORIGINATE/ANSWER

  Type:          Configuration

  Format:        AT [cmds] S22=n [cmds]

  Description:   Selects originate or answer mode

    Command                              Function

     S22=0       Enables answer mode

     S22=1       Enables originate mode

                                          PLAYBACK VOLUME

  Type:          Register

  Format:        AT [cmds] S74=n [cmds]

  Description:   Determines playback volume. Further information is unavailable

                            PULSE/TONE DIALING

  Type:              Register

  Format             AT [cmds] S16=n [cmds]

  Description:       Selects between tone and pulse dialing. Further
                     information is unavailable

                                PUMP STATUS

  Type:            Register

  Format:          AT [cmds] S36=n [cmds]

  Description:     Displays current pump status. Further information is
                   unavailable

                                QUIET MODE

  Type:          Register

  Format         AT [cmds] S14=n [cmds]

  Description:   Enables/disables quiet mode

    Command                              Function

     S14=0       Quiet mode disabled

     S14=1       Quiet mode enabled



                               RECEIVE SPEED

  Type:          Register

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

  Description:   Selects receive speed. Further information is
                 unavailable

                           RECEIVED SIGNAL LEVEL

  Type:            Register

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

  Description:     Selects receive signal level. Further information is
                   unavailable

                                          REQUEST TO SEND

  Type:          Register

  Format:        AT [cmds] S66=n [cmds]

  Description:   Selects RTS options. Further information is unavailable

                           REQUESTED MODULATION

  Type:           Register

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

  Default:        34

  Description:    Selects line modulation. Further information is
                  unavailable

                               RESULT CODES

  Type:              Register

  Format:            AT [cmds] S43=n [cmds]

  Description:       Determines result code sending options. Further
                     information is unavailable

                           SIGNAL TO NOISE RATIO

  Type:             Register

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

  Unit:             dBM

  Description:      Determines signal to noise ratio. Further information
                    is unavailable

                               SPEAKER MODE

  Type:                Register

  Format:              AT [cmds] S29=n [cmds]

  Description:         Selects various speaker options

       Command                             Function

        S29=0          Speaker disabled

        S29=1          Speaker enabled until carrier signal detected

        S29=2          Speaker enabled

        S29=3          Speaker enabled following dialing, then disabled
                       after carrier signal detected.

                              SPEAKER VOLUME

  Type:          Register

  Format:        AT [cmds] S30=n [cmds]

  Description:   Controls speaker volume

    Command                              Function

     S30=0       Speaker disabled

     S30=1       Low volume setting

     S30=2       Medium volume setting

     S30=3       Highest volume setting



                          SPEAKERPHONE MICROPHONE

  Type:            Register

  Format:          AT [cmds] S90=n [cmds]

  Range:           0 - 3

  Description:     Controls microphione options. Further information is
                   unavailable

                             SPEAKERPHONE MUTE

  Type:          Register

  Format:        AT [cmds] S88=n [cmds]

  Range:         0 - 2

  Description:   Enables mute function. Further information is
                 unavailable

                            SPEAKERPHONE VOLUME

  Type:          Register

  Format:        AT [cmds] S89=n [cmds]

  Range:         0 - 15

  Description:   Controls volume. Further information is unavailable

                                              TONE 0

  Type:               Register

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

  Range:              0 - 3F

  Description:        DTMF tone reports Cap0. Further information is unavailable

                                              TONE 1

  Type:               Register

  Format:             AT [cmds] S85=n [cmds]

  Range:              0 - 3F

  Description:        DTMF tone reports Cap1. Further information is unavailable

                                              TONE 2

  Type:               Register

  Format:             AT [cmds] S86=n [cmds]

  Range:              0 - 3F

  Description:        DTMF tone reports Cap2. Further information is unavailable

                        TRANSMISSION LEVEL - GAIN

  Type:         Register

  Format:       AT [cmds] S45=n [cmds]

  Range:        0-10

  Default:      3

  Unit:         -1 dBm

  Description   Sets the signal level for transmission gain

                               VERBOSE MODE

  Type:             Register

  Format            AT [cmds] S15=n [cmds]

  Description:      Selects word or numeric format for information-text
                    and result codes

     Command                              Function

      S15=0         Numeric format enabled

      S15=1         Verbose (word) format enabled



                         VOICE RE-RING DETECT TIME

  Type:                  Configuration

  Format:                AT [cmds] S79=n [cmds]

  Default:               70

  Range:                 0-255

  Unit:                  .1 second

  Description:           Sets the maximum time the modem will wait for
                         the remote station to ring again before it
                         assumes that it has gone off-hook.

                          VOICE RING DETECT TIME

  Type:                  Configuration

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

  Default:               100

  Range:                 0-255

  Unit:                  .1 second

  Description:           Sets the maximum time the modem will wait for
                         the remote station to ring before it assumes
                         that it went off-hook before it rang.

                             VOICE SAMPLE RATE

  Type:           Register

  Format:         AT [cmds] S91=n [cmds]

  Range:          1, 2

  Description:    Selects voice sample rate. Further information is
                  unavailable

                          VOICE SILENCE DETECTION

  Type:                  Configuration

  Format:                AT [cmds] S81=n [cmds]

  Description:           Selects whether the modem will use silence
                         detection to pause recording during periods of
                         silence.

        Command                              Function

         S81=0           Silence detection disabled.

         S81=1           Silence detection enabled.

                     VOICE SILENCE DETECTION THRESHOLD

  Type:                 Configuration

  Format:               AT [cmds] S82=n [cmds]

  Description:          Sets the threshold of sensitivity that the modem
                        uses to determine silence detection.

       Command                              Function

        S82=0           Silence detection disabled.

        S82=1           Minimum silence detection sensitivity.

        S82=2           Standard silence detection sensitivity.

        S82=3           Maximum silence detection sensitivity.

                       VOICE SILENCE DETECTION TIME

  Type:           Configuration

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

  Default:        Unidentified

  Range:          0 - 255

  Unit:           .1 second

  Description:    Sets the minimum amount of silence that the modem will
                  detect.



                             VOICE TIMING MARK

  Type:             Register

  Format:           AT [cmds] S87=n [cmds]

  Range:            0 - 255

  Unit:             .1ms

  Description:      Configures timing mark placement. Further information
                    is unavailable

                       MISCELLANEOUS TECHNICAL NOTES

  S Registers 170 - 174 are for debug purposes. S registers 197 - 199 are
  for diagnostic use only

