User's Manual

Page 75 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.5.2 Call control
2.5.2.1 +CBST - select bearer service type
+CBST – select bearer service type
Execute command
Read command
AT+CBST? Returns current value of the parameters <speed>,<name> and <ce>
Write command
AT+CBST = <speed>,
<name>, <ce>
Selects the bearer service <name> with data rate <speed>, and the
connection element <ce> to be used when data calls are originated.
Values may also be used during mobile terminated data call setup,
especially in case of single numbering scheme calls (refer +CSNS).
Parameters:
The default values of the subparameters are manufacturer specific since
they depend on the purpose of the device and data services provided by
it. Not all combinations of these subparameters are supported. The
supported values are:
<speed>
0 – autobauding (automatic selection of the speed)
1 - 300 bps (V.21)
2 - 1200 bps (V.22)
3 - 1200/75 bps (V.23)
4 - 2400 bps (V.22bis)
6 - 4800 bps (V.32)
7 - 9600 bps (V.32)
14 - 14400 bps (V.34)
65 - 300 bps (V.110)
66 - 1200 bps (V.110)
68 - 2400 bps (V.110 or X.31 flag stuffing)
70 - 4800 bps (V.110 or X.31 flag stuffing)
71 - 9600 bps (V.110 or X.31 flag stuffing)
75 - 14400 bps (V110 or X.31 flag stuffing)
<name>
0 - data circuit asynchronous
<ce>
0 – transparent
1 - non transparent
Default is +CBST = 7,0,1
Test command
AT+CBST=? Returns the supported range of values of the parameters.
Example
Reference GSM 07.07
SW release Version A