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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
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Type:
| Immediate
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Format:
| AT [cmds] #VCI? [cmds]
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Description:
| Displays the type of compression currently in use.
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VOICE-LOCAL SERIAL PORT SPEED
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Type:
| Configuration
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Format:
| AT [cmds] #BDR=n [cmds]
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Default:
| 0
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Range:
| 0 - 48
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Unit:
| 2400bps
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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.
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VOICE RE-RING DETECT TIME
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Type:
| Configuration
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Format:
| AT [cmds] #VRA=n [cmds]
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Default:
| 70
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Range:
| 0 -255
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Unit:
| 10 mS
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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.
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VOICE RECEIVE
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Type:
| Immediate
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Format:
| AT [cmds] #VRX
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Description:
| Commands the modem to begin receiving voice data.
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VOICE RING DETECT TIME
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Type:
| Configuration
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Format:
| AT [cmds] #VRN=n [cmds]
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Default:
| 70
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Range:
| 0 - 255
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Unit:
| .1 second
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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.
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VOICE SAMPLE QUALITY
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Type:
| Configuration
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Format:
| AT [cmds] #VBS=n [cmds]
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Description:
| Selects the number of bits per sample that the modem records.
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Note:
| This modem may not support all options listed below. The #VBS? command will display the available options.
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Command
| Function
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#VBS=2
| Modem records 2 bits per sample in ADPCM encoding.
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#VBS=3
| Modem records 3 bits per sample in ADPCM encoding.
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#VBS=4 | Modem records 4 bits per sample in ADPCM encoding.
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#VBS=8
| Modem records 8 bits per sample in PCM encoding.
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#VBS=16
| Modem records 16 bits per sample in PCM encoding.
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VOICE SAMPLING RATE
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Type:
| Configuration
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Format:
| AT [cmds] #VSR=n [cmds]
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Description:
| Sets the sampling rate used when recording voice signals.
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Command
| Function
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#VSR=7200 | Selects a sampling rate of 7.2KHz.
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#VSR=8000
| Selects a sampling rate of 8KHz.
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#VSR=11025
| Selects a sampling rate of 11.025KHz in PCM encoding only.
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VOICE SILENCE DETECTION TIME
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Type:
| Configuration
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Format:
| AT [cmds] #VSP=n [cmds]
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Default:
| 55
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Range:
| 0 - 255
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Unit:
| .1 second
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Description:
| Sets the minimum amount of silence that the modem will detect.
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VOICE SILENCE DETECTION THRESHOLD
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Type:
| Configuration
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Format:
| AT [cmds] #VSS=n [cmds]
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Description:
| Sets the threshold of sensitivity that the modem uses to determine silence detection.
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Command
| Function
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#VSS=0
| Silence detection disabled.
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#VSS=1
| Minimum silence detection sensitivity.
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#VSS=2
| Standard silence detection sensitivity.
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#VSS=3
| Maximum silence detection sensitivity.
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VOICE TIMING MARK
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Type:
| Configuration
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Format:
| AT [cmds] #VTM=n [cmds]
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Description:
| Configures timing mark placement.
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Command
| Function
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#VTM=0
| Timing marks disabled.
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#VTM=1
| Timing marks enabled.
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VOICE TRANSMISSION LEVEL
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Type:
| Configuration
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Format:
| AT [cmds] #TL=hhhh [cmds]
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Default:
| 3FFF
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Range:
| 0000 - 7FFF
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Unit:
| Unidentified (hexadecimal)
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Description:
| Sets the transmission level for sending audio in voice mode.
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VOICE TRANSMIT
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Type:
| Immediate
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Format:
| AT [cmds] #VTX
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Description:
| Commands the modem to begin transmitting voice data.
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VOICE VOLUME LEVEL
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Type:
| Configuration
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Format:
| AT [cmds] #VGT=n [cmds]
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Description:
| Sets the volume level when playing back audio signals.
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Command
| Function
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#VGT=128
| Low volume setting.
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#VGT=129 | Medium volume setting.
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#VGT=130
| High volume setting.
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#VGT=131
| Highest volume setting.
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