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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 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.
1DTMF tones are detected.
1 0 V.25 1300Hz calling tone is not detected.
1V.25 1300Hz calling tone is detected.
2 0 T.30 1100Hz fax tone is not detected.
1T.30 1100Hz fax tone is detected.
3 0 V.25/T.30 2100Hz answer tone is not detected.
1V.25/T.30 2100Hz answer tone is detected.
4 0 Bell 2225Hz answer tone is not detected.
1Bell 2225Hz answer tone is detected.
5 0 Call progress tones are not detected.
1Call 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, #, *; n 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 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.


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