Specifications

SIM900 AT Command Manual
the addresses for all defined contexts will be returned.
1..3 PDP Context Identifier, cid 3 is reserved and is always
defined, it cannot be changed by user.
<PDP_addr> String type IP address
Format: "<n>.<n>.<n>.<n>" where <n>=0..255
Reference Note
Write command returns address provided by the network if a connection has
been established.
7.2.8 AT+CGCLASS GPRS Mobile Station Class
AT+CGCLASS GPRS Mobile Station Class
Response
+CGCLASS: (list of supported <class>s)
OK
Test Command
AT+CGCLASS=
?
Parameter
See Write Command
Response
+CGCLASS: <class>
OK
Read Command
AT+CGCLASS?
Parameter
See Write Command
Response
OK
ERROR
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CGCLASS=
<class>
Parameter
<class> a string parameter(string should be included in quotation
marks) which indicates the GPRS mobile class (in
descending order of functionality)
B Class-B mode of operation (A/Gb mode), (not
applicable in I u mode) MT would operate PS and
CS services bu t not simultaneously
CC Class-C mode of operation in CS only mode
SIM900_AT Command Manual_V1.03 164 12/24/2010