9.2 Functional behaviour of VMSCA

23.0793GPPRelease 17Support of Optimal Routeing (SOR)Technical realizationTS

The functional behaviour of VMSCA is specified in 3GPP TS 23.018 [6]. The only functions specific to optimal routeing are:

– Routeing the call to the associated GMSC function if the gsmSCF indicates that the call is eligible for optimal routeing;

– The transfer of the destination address, if it is received in the indication of the answer event, to the call data record, to allow the correct charge for the call to be made. This function is required only if VMSCA supports optimal routeing of mobile-to-mobile calls.