INTERNETWORKING BETWEEN A NETWORK CAPABLE OF CARRYING VOICE OVER PACKET ACCESS AND A NETWORK NOT CAPABLE OF CARRYING VOICE OVER PACKET ACCESS

摘要

Systems, methods, and computer program products for interworking messages between a first network capable of carrying voice calls over packet access according to a predetermined criterion and a second network not capable of carrying voice calls over packet access according to the predetermined criterion are disclosed. The location of the user device is determined based on messages received on a plurality of interfaces, and call processing is handled depending on the location of the user device in a first service area of the first network or a second service area of the second network.