Patent ID: 6108332
Filing Date: 2000-08-22
Classification: H04Q

Abstract:
A telecommunications system for performing a local number portability query for a long distance call, comprising:a select one of a plurality of interexchange carriers for receiving said long distance call, each of said plurality of interexchange carriers having a carrier identification code associated therewith; anda local service switching point for routing said long distance call to said select interexchange carrier, said local service switching point having a code list stored therein, said code list including said carrier identification codes associated with requesting ones of said interexchange carriers that have requested said local service switching point to perform local number portability queries for all calls routed to said requesting interexchange carriers, said local service switching point being adapted to compare said carrier identification code associated with said select interexchange carrier with said code list and perform, prior to routing said long distance call to said select interexchange carrier, said local number portability query in response to a determination that said carrier identification code associated with said select interexchange carrier is on said code list.