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ERROR Otherwise.
5.2.2.3 +VTS - Send Voice Tone(s)
This command causes the modem to send DTMF tones, single frequency tone, and,
optionally, double frequency tones.
Syntax
+VTS=<string>
Defined Values
<string> To be added
Reporting Current or Selected Values
Command: +VTS?
Response: +VTS: <freq1>, <freq2>, <dur>
Example: +VTS: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command: +VTS=?
Response: +VTS: (<freq1> range), (<freq2> range), (<dur> range)
Example: +VTS: (???)
Result Codes
OK <string> = 0 or 1.
ERROR Otherwise.
5.2.2.4 +VTX - Start Modem Transmit (Playback)
This command causes the modem to start the voice transmission process.
Syntax
+VTX
Result Codes
CONNECT The modem accepts the command.
ERROR The modem is not connected to at least one off-hook telephone line or one
non-telephone line.
5.2.2.5 +VGR - Voice Gain Receive (Record Gain)
This command causes the modem to set the gain for received voice samples.
Syntax
+VGR=<gain>
Defined Values
<gain> Decimal number between 0 and 255 corresponding to the gain.
Reporting Current or Selected Values
Command: +VGR?
Response: +VGR: <gain>
Example: +VGR: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command: +VGR=?
Response: +VGR: <gain> range
Example: +VGR: 0-255
Result Codes
OK <gain> = 0-255.
ERROR Otherwise.
5.2.2.6 +VGT - Voice Gain Transmit (Playback Volume)
This command causes the modem to set the volume level.
Syntax
+VGT=<level>
Defined Values
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