System and process for extending the coverage of the port of call of the visitor of a single mobile switching center to a plurality of mobile switching centres within a radio network telecCommunications visited and process for making a call to a mobile subscriber moving within a radio telecommunications network visited

摘要

A system and method are disclosed for extending roamer port coverage from a single mobile switching center (MSC) to a plurality of associated MSCs within a visited radio telecommunications network (70) in which a mobile subscriber (19) is roaming. In a first MSC (73), a roamer port number is defined to cover the associated plurality of MSCs (74, 75) within the visited radio telecommunications network (70). When a call is received through the roamer port number for the roaming mobile subscriber (19), the first MSC (73) simultaneously places calls by seizing trunks (76) to each of the associated plurality of MSCs (74, 75), and instructs each of the associated plurality of MSCs to simultaneously page for the roaming mobile subscriber (19). Alternatively, the first MSC may utilize network signaling messages to notify each of the associated plurality of MSCs (74, 75) that the call is a roamer port call and to instruct each of the MSCs to page for the roaming mobile subscriber (19). Upon receipt of a successful page response in one of the paging MSCs, the call is routed to the MSC with the successful page response.