this SIM5218 AT command manual - Cooking Hacks

SIM5218 Serial AT Command Set
3 – Add the held call to the active calls
4 – Connect two calls and cut off the connection between users and them simultaneously
Examples
AT+CHLD=
+CHLD: (0,1,1x,2,2x,3,4)
OK
9.12 AT+CUSD Unstructured supplementary service data
Description
The command allows control of the Unstructured Supplementary Service Data (USSD). Both
network and mobile initiated operations are supported. Parameter is used to disable/enable the
presentation of an unsolicited result code (USSD response from the network, or network initiated
operation) +CUSD: [,,] to the TE. In addition, value =2 is used to cancel an
ongoing USSD session.
SIM PIN References
YES 3GPP TS 27.007
Syntax
Test Command
AT+CUSD=
Read Command
AT+CUSD
Write Command
AT+CUSD=
[,[,]]
Execution Command
AT+CUSD
Responses
+CUSD: (list of supported s)
OK
Responses
+CUSD:
OK
Responses
OK
ERROR
+CME ERROR:
Responses
Set default value (=0):
OK
Defined values
0 – disable the result code presentation in the TA
1 – enable the result code presentation in the TA
SIM5218_Serial _ATC_V1.36 162
5/15/2012