Motorola Corporation

Robert J Thomas

Thomas G Hallin

William N Shores

Barbara M Desutter

Edward J Neyens

A third generation (3G) gateway provides the facilities for extending a number of internet protocols between a second generation (2G) network and a 3G network. The various messages of a session initiation protocol (SIP) are extended to provide user identification and server identification subfields. The SIP message extensions facilitate the communication of 2G and 3G networks for the purposes of implementing push-to-talk and dispatch service features.

Growing community of inventors

Phoenix, AZ, United States of America

Robert J Thomas