AT Commands Set

SIM5320 AT Command Set
the active call
2X – Place all active calls except call X on hold
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
6.12 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
SIM5320_ATC_V1.24 119
8/14/2012