| 摘要 |
A cellular telephone network (10) including a plurality of service areas (26) each served by a different mobile switching center (12) wherein messages are transmitted between mobile switching centers, accounting for instances of inter-service area handoff of a mobile subscriber cellular call, to identify the public safety answering point (PSAP) system (24) to be utilized in answering an emergency telephone call from the mobile subscriber. When multiple inter-service area handoffs have occurred, the PSAP identification message (32) is sent from the serving mobile switching center (12(2)) or (12(3)) to the anchor mobile switching center (12(1)) to allow for the identification of the appropriate PSAP. This message could be relayed through one or more intermediate tandem mobile switching centers (12(2)).
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