Patent ID: 8027693

Claim:
A method comprising the steps of: a) receiving a call intended for a designated cellular subscriber unit at a serving MSC having a plurality of border MSCs; (b) accessing records of responses to previous Intersystem Pages at the serving MSC that reflect prior uses of the sewing MSC; (c) determining from the records that the designated cellular subscriber unit, during a recent prior use of the serving MSC, responded to an Intersystem Page (ISPAGE) message from one of the plurality of border MSC identified from the records; (d) transmitting, on a first page attempt to the designated cellular subscriber unit via, the Serving MSC, an ISPAGE message directed toward said identified border MSC; wherein the step (c) of determining from the records that the designated cellular subscriber unit, during a recent prior use of the serving MSC, responded to an Intersystem Page (ISPAGE) message further comprises the step of accessing a database that identifies cellular subscriber units that responded to an ISPAGE message from a border MSC.