Comtrol AT Commands for SmartACFL User Manual
Page 159

Command Reference Manual
100722A
Conexant
6-15
6.2.2.12 +VSM - Compression Method Selection
This command causes the modem to set the voice compression method, the silence compression sensitivity, and the voice
sampling rate.
Syntax
+VSM=
Defined Values
Decimal number identifying the compression method.
signal.
Reporting Current or Selected Values
Command: +VSM?
Response:
Example:
1,8000,0,0
Default
Reporting Supported Range of Parameter Values
Command: +VSM=?
Response:
Decimal number identifying the compression method (1, 129, 130, 140, or 141).
Alphanumeric string describing the compression method (UNSIGNED PCM, IMA ADPCM,
UNSIGNED PCM, 2 Bit ADPCM, or 4 Bit ADPCM).
Decimal number defining the average number of bits in the compressed sample not including
silence compression (2, 4 or 8).
Decimal number (0) reporting the time interval, in units of 0.1 second, between timing marks. A
value of 0 reports that timing marks are not supported.
signal (8000).
indicates not supported.
indicates not supported.
Example:
1,"UNSIGNED PCM",8,0,8000,0,0
129,"IMA ADPCM",4,0,8000,0,0
130,"UNSIGNED PCM",8,0,8000,0,00
140,"2 Bit ADPCM",2,0,8000,0,0
141,"4 Bit ADPCM",4,0,8000,0,0
OK
Result Codes
OK
Valid range.
ERROR
Otherwise, or if not in Voice Mode.