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Micro House PC Hardware Library Volume II: Network Interface Cards And Modems Micro House PC Hardware Library Volume II: Network Interface Cards And Modems
by Micro House International, Inc. and Scott Mueller
Que, Macmillan Computer Publishing
ISBN: 078971664x   Pub Date: 06/17/98
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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=0Telephone 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.
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=4Modem 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.


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