Motorola Corporation

Barbara M Desutter

Keith Andrew Olds

Thomas G Hallin

William N Shores

Joseph C Sligo

Edward J Neyens

Robert J Thomas

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.

Interface call signaling protocol

A transcoder () includes a method for assigning transcoder channel elements (). The transcoding assignment method selects a DSP () selects a DSP (channel element) of the required type which has available channel elements (). Further, the transcoding assignment method may dynamically reassign () DSPs from one channel element type to another.

Method for assigning transcoding channel elements

Growing community of inventors

Phoenix, AZ, United States of America

Barbara M Desutter