Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 49 23.06.2010
1 deactivate the unsolicited reporting of CCM
value
2 activate the unsolicited reporting of CCM value
<ccm> string type (string should be included in quotation
marks); three bytes of the current CCM value in
hex-decimal format (e.g. "00001E" indicates decimal
value 30); bytes are similarly coded as ACMmax
value in the SIM
000000-FFFFFF
Reference
GSM 07.07 [13]
Note
3.2.4 AT+CBST Select Bearer Service Type
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
Parameters
see Write Command
Read Command
AT+CBST?
Response
+CBST: <speed>,<name>,<ce>
OK
Parameters
see Write Command
Write Command
AT+CBST=<spee
d>[,<name>[,<ce
>]]
Response
TA selects the bearer service <name> with data rate <speed>, and the
connection element <ce> to be used when data calls are originated.
OK
ERROR
Parameters
<speed> 0 Auto-bauding (automatic selection of the speed; this
setting is possible in case of 3.1kHz modern and
non-transparent service)
7 9600 bps (V.32)
71 9600 bps(V.110 or X.31 flag stuffing)
Supported if UMTS_FTR is activated
<name> 0
Data circuit asynchronous (UDI or 3.1 kHz modem)
<ce> 1 non-transparent