Comtrol AT Commands for SmartACFL - 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.
containing the supported range of voice samples per second of the analog
signal.
containing the supported range of sensitivity settings for voice receives.
containing the supported range of expansion values for voice transmits.
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.
containing the supported range of voice samples per second of the analog
signal (8000).
containing the supported range of sensitivity settings for voice receives (0). A 0
indicates not supported.
containing the supported range of expansion values for voice transmits (0). A 0
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.