Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 149 12/24/2010
Response
MULTISLOT CLASS: (4,8,9,10)
OK
Test Command
AT+CGMSCLA
SS=?
Parameter
See Write Command
Response
MULTISLOT CLASS: <class>
OK
Read Command
AT+CGMSCLA
SS?
Parameter
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CGMSCLA
SS=<class>
Parameter
<class> GPRS multi-slot class
Reference Note
6.2.43 AT+CDEVICE View Current Flash Device Type
AT+CDEVICE View Current Flash Device Type
Read Command
AT+CDEVICE?
Response
Device Name: (Current flash device type)
OK
Reference
V.25ter
Note
6.2.44 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