Reconnection of a mobile unit to a call session controlled by a first MSC
is supported responsive to a network-initiated or mobile-originated
reconnect attempt even in instances where the mobile unit has roamed to a
border cell controlled by a second MSC. In a network-initiated reconnect
attempt, the first MSC sends a suspended call page request to a second
MSC. The second MSC pages the mobile unit, sets up a bearer channel to
the mobile unit, and sends to the first MSC a suspended call page
response including indicia of the bearer channel set up by the second
MSC. The first MSC establishes a bearer channel to the second MSC thereby
reconnecting the mobile unit to the call session. In a mobile-originated
reconnect attempt, the mobile unit sends a mobile-originated reconnect
message to the second MSC. If the second MSC does not find session
information associated with the call, it sends a suspended call handoff
request to the first MSC causing the first MSC to query a database to
find indicia of the call session, establish a bearer channel to the
second MSC and send to the second MSC a suspended call handoff
acknowledgement including information associated with the call session.
The second MSC establishes a bearer channel to the mobile unit thereby
reconnecting the mobile unit to the call session.