Patent ID: 7953111
Filing Date: 2011-05-31
Classification: H04L,H04Q

Abstract:
1. A method of interworking via a state machine for use in interworking between an H.323 based network and a session initiation protocol based network, the method comprising: receiving at an interworking server a set-up request from an H.323 endpoint, wherein the interworking server includes a data processor for call processing and a memory for storing the state machine; transmitting a corresponding invite message to an addressed session initiation protocol endpoint; receiving a ringing response message from the session initiation protocol endpoint; transmitting a corresponding alert message to the H.323 endpoint; receiving an OK message from the session initiation protocol endpoint; transmitting a connect message to the H.323 endpoint; negotiating the connect message utilizing an H.245 protocol; transmitting an ACK message to the session initiation protocol endpoint; and permitting communication between the H.323 endpoint and the session initiation protocol endpoint utilizing a realtime transport protocol, wherein the H.323 based network is adapted to provide realtime mobile multimedia communications and conferencing, wherein a plurality of H.323 mobility gatekeepers are adapted to provide H.323 mobility services; and providing a media switching fabric configured to switch media terminated at the interworking server and carried over realtime transport protocol between the H.323 endpoint and the session initiation protocol endpoint.