Patent ID: 6014379
Filing Date: 2000-01-11
Classification: H04M,H04Q

Abstract:
A method for using a first telecommunications network including trunked together switching systems maintained and operated by a first telecommunications entity for selectively establishing a connection between a first station connected to a first one of said switching systems in said first telecommunications network and a second station associated with a second switching system in said first telecommunications network but connected to a third switching system maintained and operated by a second telecommunications entity, comprising the steps of:a) storing in a database connected to a public wide area data network not maintained and operated by said first telecommunications entity, a table of information for call routing through said first telecommunications network, said table comprising entries relating to subscribers to at least said first telecommunications network;b) setting in said second switching system a trigger for initiating call set-up signaling;c) receiving from said first station call initiation characters identifying said second station;d) responsive to receipt of said characters in said receiving step, transmitting a signal corresponding to said characters to said second switching system;e) responsive to receipt of said second switching system, formulating a first data message;f) transmitting said first data message from said second switching system to an interface between said first telecommunications network and said public wide area data network;g) responsive to receipt of said first data message by said interface, formulating a second data message containing said identification characters as data;h) transmitting said second data message to said database;i) returning from said database to said interface a response message including routing information derived from said database for routing the call to said second station;j) responsive to receipt of said response message by said interface, formulating a third data message including said routing information;k) transmitting said third data message from said interface to said first telecommunications network; andl) responsive to receipt of said third data message routing said initiated call.