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This command causes the modem to set the voice compression method, the silence
compression sensitivity, and the voice
sampling rate.
Syntax
+VSM=<cml>,<vsr>,<sds>,<sel>
Defined Values
<cml> Decimal number identifying the compression method. To be expanded.
<vsr> <range of values> containing the supported range of voice samples per second of
the analog
signal. To be expanded.
<scs> <range of values> containing the supported range of sensitivity settings for voice
receives. To be
expanded. To be expanded.
<sel> <range of values> containing the supported range of expansion values for voice
transmits.
Reporting Current or Selected Values
Command: +VSM?
Response: +VSM: <cml>,<vsr>,<sds>, <sel>
Example: +VSM: 130,UNSIGNED PCM,8,0,(7200,11025),(127-129),(0)"
Reporting Supported Range of Parameter Values
Command: +VSM=?
Response: +VSM: <cml>, <cmid>, <bps>, <tm>,<vsr>,<sds>, <sel>
<cml> Decimal number identifying the compression method.
<cmid> Alphanumeric string describing the compression method.
<bps> Decimal number defining the average number of bits in the compressed sample
not including
silence compression.
<tm> Decimal number (0-X) reporting the time interval, in units of 0.1 second, between
timing marks. A
value of 0 reports that timing marks are not supported. The range is 1 to 60 seconds for
<tm> = 1
to 60.
<vsr> <range of values> containing the supported range of voice samples per second of
the analog
signal.
<scs> <range of values> containing the supported range of sensitivity settings for voice
receives.
<sel> <range of values> containing the supported range of expansion values for voice
transmits.
Example: +VSM: 128, ADPCM,2,0,7200,(127-129),(0)<cr><lf>
129,ADPCM,4,0,7200,(127-129),(0) <cr><lf>
130,UNSIGNED PCM,8,0,(7200,11025),(127-129),(0)
Result Codes
OK Valid range.
ERROR Otherwise.
5.2.2.13 +VTD - Beep Tone Duration Timer
This command causes the modem to set the default DTMF/tone generation duration.
Syntax
+VTD=<dur>
Defined Values
<dur> Decimal number specifying the default DTMF/tone generation duration in units of
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