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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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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.

VOICE SAMPLING RATE
Type: Configuration
Format: AT [cmds] #VSR=n [cmds]
Description: Sets the sampling rate used when recording voice signals.
Command Function
#VSR=7200Selects a sampling rate of 7.2KHz.
     #VSR=8000 Selects a sampling rate of 8KHz.
     #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: 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=1 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]
Description: Sets the volume level when playing back audio signals.
Command Function
     #VGT=128 Low volume setting.
#VGT=129Medium volume setting.
     #VGT=130 High volume setting.
     #VGT=131 Highest volume setting.


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