Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 151 23.06.2010
Response
MULTISLOT CLASS: <class>
OK
Read Command
AT+CGMSCLA
SS?
Paramete
see write command
Test Command
AT+CGMSCLA
SS=?
Response
MULTISLOT CLASS: (4,8,9,10)
OK
Response
OK
ERROR
Write Command
AT+CGMSCLA
SS=<class>
Parameter
<class> GPRS multislot class
Reference Note
6.2.42 AT+CDEVICE View Current Flash Device Type
AT+CDEVICE View Current Flash Device Type
Response
Device Name: (Current flash device type)
OK
Read Command
AT+CDEVICE?
Parameter
Reference
V.25ter
Note
6.2.43 AT+CCALR Call Ready Query
AT+CCALR Call Ready Query
Response
+CCALR: (list of supported <mode>s)
OK
Test Command
AT+CCALR=?
Parameter
<mode> a numeric parameter which indicates whether the
module is ready for phone call.
0 module is not ready for phone call