Westermo GDW-11 - Manual (Page 276)

276 SIM TOOLKIT 6615-2220
Messages exchanged during a SIM ToolKit operation.
The following scheme shows the SIM Toolkit commands and unsolicited results that are
exchanged.
On the first step, the customer application informs the WESTERMO product which
facilities are supported. This operation is performed with the +STSF (SIM ToolKit Set
Facilities) command, which also allows to activate or deactivate the SIM Toolkit function-
ality.
On the second step, an unsolicited result +STIN (SIM ToolKit indication) is sent by the
product, indicating to the customer application which command type the SIM Application
Toolkit is running on the SIM card. The last SIM Toolkit indication can be requested by
the +STIN? command.
On the third step, the customer application uses the +STGI (SIM ToolKit Get
Information) command to get all the information about the SIM ToolKit command,
returned by a +STIN message.
On the fourth step, the customer application uses the +STGR (SIM Toolkit Give
Response) to send its response (if any) to the SIM ToolKit Application.
The +STCR (SIM Toolkit Control response) indication is an unsolicited result sent by the
SIM when Call control functionality is activated and before the customer application has
performed any outgoing call, SMS, SS, or USSD.
d
i f ti
Step 1: Configuration and Activation
Step 2: SIM sends pro -active
StepP 3: Customer application get all the
Step 4: User response is sent to the SIM
+STSF =X,XXXXXXXX
+STIN=X
+STGI=X
+ STGI response
+STCR:X
+STCR=X,XXXXXX
Westermo
Product
Customer
Application