
ZOOM TELEPHONICS, INC.

COMSTAR 33600 SVD

Card Type                    Modem (asynchronous)
Chip Set                     Rockwell
I/O Options                  Voice, speakerphone, SVD, speaker out,
                             microphone in
Maximum Data 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

                             Rockwell V.FC
Fax Modulation Protocol      ITU-T V.17, V.21CH2, V.27ter, V.29, V.33
Fax Class                    Class I
Error Correction/Compression MNP5, MNP10EC, V.42, V.42bis
Data Bus                     16-bit ISA

[Image]

                                CONNECTIONS

          Function            Label            Function             Label

  Telephone line out           CN1     Speaker out                  CN3

  Telephone line in            CN2     Microphone in                CN4

                        USER CONFIGURABLE SETTINGS

                      Setting                        Label     Position

  Speaker jack is monaural                            J16        Open

  Speaker jack is stereo                              J16       Closed

  Microphone is electret                              J25       Closed

  Microphone is dynamic                               J25        Open

  AUDIO OUTPUT LEVEL CONFIGURATION

  Setting        J6          J10

   Lowest       Open       Closed

    Low         Open        Open

   Medium      Closed      Closed

    High       Closed       Open

                        SUPPORTED STANDARD COMMANDS

                             Basic AT Commands

  +++, comma, A/

  A, B, E, H, L, M, N, O, P, Q, T, V, W, X, Y, Z

  &C, &D, &F, &G, &K, &Q, &S, &T, &V, &W, &Y, &Z

                           Extended AT Commands

  \A, \B, \G, \N, \V

  %C, %E, %L, %Q

                            Special AT Commands

  #CID, :E, -K, +MS, -Q

                                S-Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12, S18, S24, S25, S26,
  S29, S30, S32, S33, S36

  S38, S39, S46, S48, S82, S86, S95

            Note: See MHI documentation for complete information.

     UNIDENTIFIED COMMANDS

    Command         Default

       \K        Unidentified

      S14        Unidentified

      S16        Unidentified

      S21        Unidentified

      S22        Unidentified

      S23        Unidentified

      S27        Unidentified

      S28        Unidentified

      S31        Unidentified

      S40        Unidentified

      S41        Unidentified

                         Proprietary AT Command Set

                                   DIAL

  Type:                  Immediate

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

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

        Command                             Function

          DL             Re-dial last number.

          DP             Pulse dialing enabled.

         DS=n            Dial stored telephone number n.

          DT             Tone dialing enabled.

          DW             Dialing resumed following dial tone detection.

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

                               DIAL (CON'T)

      Command                              Function

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

         D@           Wait for Quiet 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^           Calling tone enabled for this call.

         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.

                       DISPLAY CHIPSET MANUFACTURER

  Type:          Immediate

  Format:        AT [cmds] #MFR? [cmds]

  Description:   Displays the voice chipset manufacturers name.

                        DISPLAY CHIPSET MODEL NAME

  Type:          Immediate

  Format:        AT [cmds] #MDL? [cmds]

  Description:   Displays the model name of the modem's voice chipset.

                         DISPLAY CHIPSET REVISION

  Type:          Immediate

  Format:        AT [cmds] #REV? [cmds]

  Description:   Displays the revision level of the modem's voice
                 chipset.

                            DISPLAY INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested about the modem.

    Command                              Function

       I0        Displays product identification code.

       I1        Displays ROM checksum.

       I2        Tests and displays ROM checksum result.

       I3        Displays firmware revision.

       I4        Displays modem identifier.

       I5        Displays country code.

       I6        Displays data pump modem and revision.

                             DISTINCTIVE RING

  Type:            Configuration

  Format:          AT [cmds] $$Rn [cmds]

  Description:     Selects whether the modem will use the Distinctive
                   Ring function.

     Command                              Function

       $$R0        Distinctive Ring disabled.

       $$R2        Distinctive Ring enabled.

                          DISTINCTIVE RING TYPES

  Format:             AT [cmds] -SDR=n [cmds]

  Default:            Unidentified

  Range:              0 - 7

  Description:        Selects which distinctive ring signals the modem
                      will respond to.

     Bit        Value                        Function

      0              0   Do not respond to distinctive ring type 1.

                    1    Respond to distinctive ring type 1.

      1              0   Do not respond to distinctive ring type 2.

                    1    Respond to distinctive ring type 2.

      2              0   Do not respond to distinctive ring type 3.

                    1    Respond to distinctive ring type 3.

                                LINE SPEED

  Type:                  Register

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

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

        Command                             Function

         S37=0           Attempt to connect at fastest common speed.

         S37=1           Set speed to 300bps.

         S37=2           Set speed to 300bps.

         S37=3           Set speed to 300bps.

         S37=5           Set speed to 1200bps.

         S37=6           Set speed to 2400bps.

         S37=7           Attempt to connect with V.23.

         S37=8           Set speed to 4800bps.

         S37=9           Set speed to 9600bps.

        S37=10           Set speed to 12Kbps.

        S37=11           Set speed to 14.4Kbps.

        S37=12           Set speed to 7200bps.

                              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 1 mode.

     #CLS=8      Modem will operate in voice mode.

                               MNP10EC MODE

  Type:                  Configuration

  Format:                AT [cmds] -SEC=n [cmds]

  Description:           Selects whether the modem will attempt to use
                         MNP10EC mode during the handshaking sequence.

        Command                              Function

         -SEC=0           MNP10EC handshaking disabled unless a V.34
                          connection is attempted via a cellular line.

         -SEC=1           MNP10EC handshaking enabled.

                           SPEAKERPHONE OPTIONS

  Type:               Configuration

  Format:             AT [cmds] #SPK=x,y,z [cmds]

  Description:        Sets various options for speakerphone functions.

       Command                              Function

         x=0           Microphone enabled.

         x=1           Microphone disabled.

         x=2           Microphone enabled with maximum gain, speaker
                       disabled.

          y            Default:            5

                       Range:              0 - 16

                       Unit:               -2 dBm

                       Description:        Sets the attenuation level for
                                           speaker output in voice mode.
                                           A value of 16 will mute the
                                           speaker.

         z=0           Microphone gain set to 0 dBm.

         z=1           Microphone gain set to 6 dBm.

         z=2           Microphone gain set to 9.5 dBm.

         z=3           Microphone gain set to 12 dBm.

                                SVD OPTIONS

  Type:                Configuration

  Format:              AT [cmds] $$ASn =xx [cmds]

  Description:         Selects whether the modem will use SVD mode and
                       selects the line source for it.

       Command                              Function

     $$ASn =OFF        SVD enabled

      $$ASn =ON        SVD disabled.

         n=1           Telephone handset used for voice I/O with high
                       data throughput.

         n=2           Telephone handset used for voice I/O with high
                       voice throughput.

         n=3           Telephone line used for voice I/O with high data
                       throughput.

         n=4           Telephone line used for voice I/O with high voice
                       throughput.

         n=5           Speakerphone used for voice I/O with high data
                       throughput.

         n=6           Speakerphone used for voice I/O with high voice
                       throughput.

                              TONE DETECTION

  Format:                    AT [cmds] #VTD=x,y,z [cmds]

  Default:                   x,y,z 63

  Range:                     0 - 63

  Description:               Sets which tones the tone detection will
                             report.

  Note:                      The value of x sets the tone detection modes
                             in voice transmit mode, y sets them in voice
                             receive mode, and z sets them in voice
                             command mode.

        Bit           Value                     Function

         0                  0   DTMF tones are not detected.

                           1    DTMF tones are detected.

         1                  0   V.25 1300Hz calling tone is not detected.

                           1    V.25 1300Hz calling tone is detected.

         2                  0   T.30 1100Hz fax tone is not detected.

                           1    T.30 1100Hz fax tone is detected.

         3                  0   V.25/T.30 2100Hz answer tone is not
                                detected.
                           1
                                V.25/T.30 2100Hz answer tone is detected.

         4                  0   Bell 2225Hz answer tone is not detected.

                           1    Bell 2225Hz answer tone is detected.

         5                  0   Call progress tones are not detected.

                           1    Call progress tones are detected.

                       TONE GENERATOR - DIRECT ENTRY

  Type:             Immediate

  Format:           AT [cmds] #VTS=[m, n, x]

  Range:            m 200-3000, n 200-3000, x 0-255

  Unit:             m 1 Hz, n 1 Hz, x .1 second

  Description:      Generates a dual-frequency tone for duration x at
                    frequencies m and n.

                     TONE GENERATOR - TIMED PHONE KEYS

  Type:           Immediate

  Format:         AT [cmds] #VTS={a, n}

  Range:          a 0-9, A-D, #, *; n 0-255

  Unit:           x .1 second

  Description:    Generates the DTMF tone for duration x for the
                  character a.

                        TONE GENERATOR - PHONE KEYS

  Type:                  Immediate

  Format:                AT [cmds] #VTS=a

  Range:                 0-9, A-D, #, *

  Description:           Generates the DTMF tones for the characters in
                         the string for the duration set with +VBT.

                           TONE GENERATOR LENGTH

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

  Default:       10

  Range:         0 - 40

  Unit:          0.1 second

  Description:   Sets the length of DTMF tones that are generated.

                               VOICE DEVICE

  Type:                  Configuration

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

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

  Note:                  This modem may not support all options listed
                         below. The #VLS? command will display the
                         available options.

        Command                              Function

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

        #VLS=1           Telephone 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=4           Telephone line and handset used for voice I/O;
                         internal speaker enabled.

        #VLS=5           Headset used for voice I/O.

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

        #VLS=7           Handset muted by disconnecting handset or
                         speakerphone from telephone line.

        #VLS=8           Connects caller ID relay for recording of
                         conversation over handset.

        #VLS=9           Connects handset (or speakerphone) to DSP chip
                         for recording or playback.

                        VOICE - DISPLAY BUFFER SIZE

  Type:          Immediate

  Format:        AT [cmds] #VBQ? [cmds]

  Description:   Displays the size of the voice buffer.

                     VOICE - DISPLAY COMPRESSION TYPE

  Type:          Immediate

  Format:        AT [cmds] #VCI? [cmds]

  Description:   Displays the type of compression currently in use.

                      VOICE - LOCAL SERIAL PORT SPEED

  Type:                  Configuration

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

  Default:               0

  Range:                 0 - 48

  Unit:                  2400bps

  Description:           Sets the speed of the local serial port when in
                         voice mode. A value of 0 indicates that the
                         modem should auto-detect the correct serial port
                         speed.

                         VOICE RE-RING DETECT TIME

  Type:                  Configuration

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

  Default:               70

  Range:                 0 -255

  Unit:                  10 mS

  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 RECEIVE

  Type:          Immediate

  Format:        AT [cmds] #VRX

  Description:   Commands the modem to begin receiving voice data.

                          VOICE RING DETECT TIME

  Type:                  Configuration

  Format:                AT [cmds] #VRN=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 before it assumes
                         that it went off-hook before it rang.

                           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.

                            VOICE SAMPLING RATE

  Type:          Configuration

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

  Description:   Sets the sampling rate used when recording voice
                 signals.

    Command                              Function

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

   #VSR=11025    Selects a sampling rate of 11.025KHz in PCM encoding
                 only.

                          VOICE SILENCE DETECTION

  Type:                  Configuration

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

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

        Command                              Function

         #VSD=0          Silence detection disabled.

         #VSD=1          Silence detection enabled.

                       VOICE SILENCE DETECTION TIME

  Type:           Configuration

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

  Default:        55

  Range:          0 - 255

  Unit:           .1 second

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

                     VOICE SILENCE DETECTION THRESHOLD

  Type:                 Configuration

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

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

       Command                              Function

        #VSS=0          Silence detection disabled.

        #VSS=1          Minimum silence detection sensitivity.

        #VSS=2          Standard silence detection sensitivity.

        #VSS=3          Maximum silence detection sensitivity.

                             VOICE TIMING MARK

  Type:          Configuration

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

  Description:   Configures timing mark placement.

    Command                              Function

     #VTM=0       Timing marks disabled.

    #VTM=10       Timing marks enabled.

                         VOICE TRANSMISSION LEVEL

  Type:           Configuration

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

  Default:        3FFF

  Range:          0000 - 7FFF

  Unit:           Unidentified (hexadecimal)

  Description:    Sets the transmission level for sending audio in voice
                  mode.

                              VOICE TRANSMIT

  Type:          Immediate

  Format:        AT [cmds] #VTX

  Description:   Commands the modem to begin transmitting voice data.

                            VOICE VOLUME LEVEL

  Type:                  Configuration

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

  Default:               153

  Range:                 128 - 228

  Unit:                  Unidentified

  Description:           Sets the volume level when playing back audio
                         signals. Lower numbers indicate a lower volume
                         level.

