User guide

Developers guidelines | AT commands
94 June 2010
Ensemble S3: GSM data/fax
Commands
AT+CBST Select bearer service type (ver. 3)
Description: 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 the case of single numbering scheme calls.
Set command: AT+CBST=[<speed>,[<name>,[<ce>]]]
Read command: AT+CBST? Displays the current setting.
Read command
response: +CBST: <speed>,<name>,<ce>
Test command: AT+CBST=? Shows if the command is supported.
Test command
response: +CBST: (list of supported <speed>s, list of supported <name>s, list of
supported <ce>s)
Parameter:
<speed>:
<speed> Description
0 Auto selection of baud setting. Default value
7 9600 bps V.32
12 9600 bps V.34
14 14400 bps V.34
15 19200 bps V.34
16 28800 bps V.34
39 9600 bps V.120
43 14400 bps V.120
47 19200 bps V.120
48 28800 bps V.120
71 9600 bps V.110 (ISDN)
75 14400 bps V.110 (ISDN)
79 19200 bps V.110 (ISDN)
80 28800 bps V.110 (ISDN)
<name>:
<name> Description
0 Asynchronous connection (UDI or 3.1kHz modem).
Default value
4 Data circuit asynchronous (RDI)