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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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TONE GENERATOR - TIMED PHONE KEYS
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Type:
| Immediate
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Format:
| AT [cmds] #VTS={a, n}
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Range:
| a 0-9, A-D, #, *; x 0-255
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Unit:
| x .1 second
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Description:
| Generates the DTMF tone for duration x for the character a.
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TONE GENERATOR - PHONE KEYS
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Type:
| Immediate
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Format:
| AT [cmds] #VTS=a
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Range:
| 0-9, A-D, #, *
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Description:
| Generates the DTMF tones for the characters in the string for the duration set with +VBT.
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TONE GENERATOR LENGTH
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Format
| AT [cmds] #VBT=n [cmds]
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Default:
| 10
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Range:
| 0 - 40
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Unit:
| 0.1 second
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Description:
| Sets the length of DTMF tones that are generated.
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VOICE BUFFER SPACE
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Type:
| Configuration
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Format:
| AT [cmds] #VSK=n [cmds]
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Default:
| 255
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Range:
| 0 - 255
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Unit:
| 1 byte
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Description:
| Sets the amount of data the modem can send into the buffer after the XOFF signal is sent.
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VOICE DEVICE
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Type:
| Configuration
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Format:
| AT [cmds] #VLS=n [cmds]
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Description:
| Selects the I/O device for the DSP chip.
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Note:
| This modem may not support all options listed below. The #VLS? command will display the available options.
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Command
| Function
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#VLS=0 | Telephone line and handset used for voice I/O.
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#VLS=1
| Telephone handset used for voice I/O.
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#VLS=2
| Internal speaker only used for voice I/O.
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#VLS=3
| External microphone only used for voice I/O.
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#VLS=4
| Telephone line and handset used for voice I/O; internal speaker enabled.
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#VLS=5
| Headset used for voice I/O.
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#VLS=6
| Speakerphone used for voice I/O.
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#VLS=7
| Handset muted by disconnecting handset or speakerphone from telephone line.
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#VLS=8
| Connects caller ID relay for recording of conversation over handset.
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#VLS=9
| Connects handset (or speakerphone) to DSP chip for recording or playback.
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VOICE - DISPLAY BUFFER SIZE
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Type:
| Immediate
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Format:
| AT [cmds] #VBQ? [cmds]
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Description:
| Displays the size of the voice buffer.
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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:
| Unidentified
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Range:
| Unidentified
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Unit:
| Unidentified
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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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