
QUADRANT COMPONENTS, INC.

CHOICE 33.6 VOICE

Card Type                    Modem (asynchronous)
Chipset                      U.S. Robotics
I/O Options                  Microphone in, speaker out, voice,
                             speakerphone
Maximum Data Rate            33.6Kbps
Maximum Fax Rate             14.4Kbps
Data Modulation              Bell 103A, 212A

                             ITU-T V.21, V.22, V.22bis, V.32, V.32bis,
                             V.34
Fax Modulation               Unidentified
Error Correction/Compression MNP5, V.42, V.42bis
Fax Class                    Class I & II
Data Bus                     8-bit ISA
Card Size                    Full height, half length

[Image]

                                CONNECTIONS

        Function           Label             Function             Label

  Telephone line            CN1       Speaker out or               CN3
                                      microphone in

  Telephone line            CN2       Speaker out or               CN4
                                      microphone in

            Note: It is not known which one of CN3 and CN4 is the speaker
            out and which is the microphone in.

                        USER CONFIGURABLE SETTINGS

                      Setting                        Label     Position

  Speaker out connector is stereo                     JP5       Closed

  Speaker out connector is mono                       JP5        Open

                 SERIAL PORT ADDRESS SELECTION

    Setting          JP1/A           JP1/B          JP1/C

  3F8h (COM1:)      Closed          Closed          Closed

  2F8h (COM2:)       Open           Closed          Closed

  3E8h (COM3:)      Closed           Open           Closed

  2E8h (COM4:)       Open            Open           Closed

  Plug-N-Play        Open            Open            Open

                            INTERRUPT SELECTION

    Setting       JP2/A       JP2/B       JP2/C       JP2/D       JP2/E

       2         Closed       Open        Open        Open        Open

       3          Open       Closed       Open        Open        Open

       4          Open        Open       Closed       Open        Open

       5          Open        Open        Open       Closed       Open

       7          Open        Open        Open        Open       Closed

  Plug-N-Play     Open        Open        Open        Open        Open

                      SUPPORTED STANDARD COMMANDS

                           Basic AT Commands

  +++, comma, A/

  A, B, C, E, F, H, L, M, O, P, T, V, X

  &C, &D, &G, &P, &R, &S, &T, &W, &Z

                              S-Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S38

            Note: See MHI help file for complete information.

                         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.

           DR            Answer mode enabled; originate mode disabled
                         following handshake initiation.

          DSn            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.

           D/            Dialing paused for 1/8 second.

           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;            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.

                       FLOW CONTROL - MODEM-TO-MODEM

  Type:                 Configuration

  Format:               AT [cmds] &In [cmds]

  Description:          Selects the type of modem-to-modem flow control
                        used.

       Command                              Function

         &I0            Software flow control disabled.

         &I1            XON/XOFF pass-through enabled.

         &I2            XON/XOFF pass-through disabled.

         &I3            Hewlett-Packard ENQ/ACK host mode enabled.

         &I4            Hewlett-Packard ENQ/ACK terminal mode enabled.

         &I5            XON/XOFF pass-through enabled in normal mode and
                        disabled in error-correcting mode.

                              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=2      Modem will operate in fax class II mode.

     #CLS=8      Modem will operate in voice mode.

                            PROFILE ON POWER-UP

  Type:            Configuration

  Format:          AT [cmds] Yn [cmds]

  Description:     Selects the profile that the modem will reset to on
                   power-up.

     Command                              Function

        Y0         Modem resets to user profile 0 on power-up.

        Y1         Modem resets to user profile 1 on power-up.

        Y2         Modem resets to factory generic profile on power-up.

        Y3         Modem resets to factory hardware flow control profile
                   on power-up.

        Y4         Modem resets to factory software flow control profile
                   on power-up.

        Y6         Displays link diagnostics.

                            STATUS REGISTER BIT

  Type:          Configuration

  Format:        Write: AT [cmds] Sn.m=0 or 1 [cmds]

                 Read: AT [cmds] Sn.m? [cmds]

  Description:   Sets/clears or reads bit m of register n.

                              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, #, *; x 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 BUFFER SPACE

  Type:                  Configuration

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

  Default:               255

  Range:                 0 - 255

  Unit:                  1 byte

  Description:           Sets the amount of data the modem can send into
                         the buffer after the XOFF signal is sent.

                               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:               Unidentified

  Range:                 Unidentified

  Unit:                  Unidentified

  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.

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

        Command                              Function

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

         #VBS=3          Modem records 3 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.

    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 TIME

  Type:           Configuration

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

  Default:        Unidentified

  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 TRANSMIT

  Type:          Immediate

  Format:        AT [cmds] #VTX

  Description:   Commands the modem to begin transmitting voice data.

                         Proprietary AT Command Set

   See QUADRANT COMPONENTS, INC. CHOICE 33.6 for a full command summary.

