Telenetics 56 - Manual (Page 201)

AT Commands
Page 193
+VSM - Compression Method Selection
This command causes the modem to set the voice compression method, the
silence compression sensitivity, and the voice sampling rate.
Reporting Supported Range of Parameter Values
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 For the default setting.
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.