## 22.10.3 Procedure in the VLR

29.0023GPPMobile Application Part (MAP) specificationRelease 15TS

The MAP process invokes macros not defined in this clause; the definitions of these macros can be found as follows:

Check_Indication see subclause 25.2.1;

Check_Confirmation see subclause 25.2.2.

The process in the VLR is shown in figure 22.10.3/1.

MSC Initiated USSD

If a USSD application in the MSC wishes to use the network initiated USSD procedure, and a connection to the MS does not exist then the MSC opens a dialogue with the VLR. This dialogue leads to the VLR performing page or search using the macro Start_USSD_VLR.

Macro Start_USSD_VLR

The macro invokes macros not defined in this clause; the definitions of these macros can be found as follows:

Check_Confirmation see subclause 25.2.1;

Process_Access_Request_VLR see subclause 25.4.2.

The macro is shown in figure 22.10.3/2.