Specifications

AT Command Set
TC3X_ATC_01_V04.00 Page 63 of 204 29.05.2002
4.5 AT+CBST Select bearer service type
Test command
AT+CBST=?
Response
+CBST: (list of supported <speed>s),(list of supported <name>s),(list of
supported <ce>s) OK
Parameter
See write command
Read command
AT+CBST?
Response
+CBST: <speed>,<name>,<ce>
OK
Parameter
See write command
Write command
AT+CBST=
<speed>[,<name>
[,<ce>]]
Response
TA selects the bearer service <name>, the data rate <speed> and the
connection element <ce> to be used when data calls are originated. The
settings also apply to mobile terminated data calls, especially when single
numbering scheme calls or calls from analog devices are received (see also
Chapter 4.41).
OK
Parameter
<speed> 0 auto bauding
4 2400 bps( V.22bis)
6 4800 bps( V.32)
7 9600 bps(V.32)
14 14400 bps (V.34)
68 2400 bps (V.110)
70 4800 bps (V.110)
71 9600 bps (V.110)
75 14400 bps (V.110)
<name> 0 asynchronous modem
<ce> 1 non-transparent
Transparent mode is not supported.
Reference
GSM 07.07
Note
· GSM 02.02[1]: List of allowed combinations of subparameters.
· The PLMN influences the second air interface (to the terminator), therefore
another mode may be established by the network.
· In multiplex mode (AT+CMUX Enter multiplex mode, pg. 86), the bearer
capabilities using 14400 bps (14,75) are not available. Incoming calls are
negotiated at 9600bps. If multiplex mode is active, the bearer capability
automatically switches to +CBST=7,0,1.