Siemens M20 Terminal Technical Description page 59

Siemens Information and Communication Products
AT+CBST Select Bearer Service Type
Test command Response
AT+CBST=? +CBST: (list of supported <speed>s), (list of supported <name>s), (list of supported <ce>s)
Parameter
see set command
Read command Response
AT+CBST? +CBST: <speed>,<name>,<ce>
OK
Parameter
see set command
Set command Response
AT+CBST= TA selects the bearer service <name> with data rate <speed>, and the connection element <ce>
[<speed>] [,<na- to be used when data calls are originated. Values may also be used during mobile terminated data
me> call setup, especially in case of single numbering scheme calls (refer +CSNS).
[,<ce>]]]
OK
Parameter
<speed>
<name>
<ce>
Reference Note
GSM 07.07 GSM 02.02[1]: list of allowed combinations of the subparameters.
The PLMN influences the second air interface (to the terminator), therefore another mode may be
established from the network.
Version 8 dated 15.03.00
1 300 bps(V.21)
2 1200 bps(V.22)
3 1200/75 bps(V.23)
4 2400 bps(V.22bis)
5 2400 bps(V.26ter)
6 4800 bps(V.32)
7 9600 bps(V.32)
65 300 bps (V.110)
66 1200 bps (V.110)
68 2400 bps(V.110)
70 4800 bps(V.110)
71 9600 bps(V.110)
0 asynchronous modem
0 transparent
1 non-transparent
AT command interface
A
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