ComStar SVD Owner’s Manual
26
AT Commands for SVD
The following tables describe the AT commands supported by
simultaneous voice and data (analog SVD). We provide these
commands for the benefit of programmers and other developers
who can use them; if you are not familiar with the special use of
AT commands, we suggest that you not try to use them.
Command
Function
-SMS=0
Data Mode only (default)
-SMS=1
Enables DSVD Mode (not supported by ComStar SVD)
-SMS=2
Enables SVD Mode
-SMS=3
Automatic Mode Select (DSVD/SVD/data only)
-SMS=y or z
(optional)
y or z
Modulation selected (See -SQS command,
below)
value
V.61
ML144
ML288
3 means
enabled
2400
—
—
3 (y default)
4800
3 (y and z
default)
3 (y default)
3
7200
—
3
3
9600
—
3
3
12000
—
3
3
14400
—
3 (z default)
3
16800
—
—
3
21600
—
—
3
24000
—
—
3
26400
—
—
3
28800
—
—
3 (z default)
-SMS=t
(optional)
Where t is the symbol rate for SVD mode (ML288
modulation only)
0 = Auto Selection (default)
1 = 2400 bits/symbol
2 = 2743 bits/symbol
3 = 2800 bits/symbol
4 = 3000 bits/symbol
5 = 3200 bits/symbol
6 = 3429 bits/symbol
-SQS=x,y
Where x selects the modulation mode:
0=V.61
1=ML144
2=ML288 (default)
and where y enables/disables automode:
0=SVD automode disabled (default)
1=SVD automode enabled (default)