User's Manual

Telit TRIZIUM Product Description
80264ST10007a Rev. 4– 09/09/04
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5.4.2 Call control
5.4.2.1 +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