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:
Receive_Open_Ind see subclause 25.1.1;
Receive_Open_Cnf see subclause 25.1.2;
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.
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.