User's Manual

105
LZT 123 7361 R1A
5. Data - CSD/HSCSD
Note! Since the modem does not support V42bis compression the following
commands have not been implemented:
•AT+DS
•AT+DR
5.1 AT+CBST Select Bearer Service Type
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.
Test command returns values supported by the TA as compound values.
Description Command Possible Responses
Select bearer service
type
AT+CBST=[<speed>,
[<name>,[<ce>]]]
•OK
•ERROR
Read the command AT+CBST? •+CBST:
<speed>,<name>,
<ce>
•OK
•ERROR
Test if the command is
supported
AT+CBST=? • +CBST: (list of supported
<speed>s,list of
supported <name>s, list
of supported <ce>s)
•OK
•ERROR
<speed> Description
0 Auto selection of baud rate
4 2400bps V.22bis
6 4800bps V.32
7 9600bps V.32
12 9600bps V.34
15 19200bps V.34
68 2400bps V.110 (ISDN)
70 4800bps V.110 (ISDN)