ZyXEL Communications Omni 288S User Manual page 98

OK
AT+VSM=<cml>,<vsr>
This command causes the DCE to select a compression scheme and sample rate as
follows:
<cml> Compression Scheme
2 ZyXEL 2 ADPCM
3 ZyXEL 3 ADPCM
30 ZyXEL 3 ADPCM (new)
4 ZyXEL 4 ADPCM
40 DVI ADPCM
80 A-law PCM
81 u-law PCM
The DCE returns the OK result code if DCE accepts this command, or it returns
the ERROR result code if any of the values are out of range.
Chapter 10 - Voice Mode Operation
Bits/Sample
2
3
3
4
4
8
8
10-19
<vsr> possible values
7200, 8000, 9600, 11025
7200, 8000, 9600, 11025
7200, 8000, 9600, 11025
7200, 8000, 9600, 11025
7200, 8000, 9600, 11025
7200, 8000, 9600, 11025
7200, 8000, 9600, 11025