Avaya Inc.

Ted Morrow

Robert Mitchell

Don Gillespie

Nancy Schmidt

Scott Hendrick

Won Uk Huh

Rick Windhausen

Charles Farwell

Tim Kaye

Ed Mooney

Cliff Grimes

Tamara Jo Noirot

The present disclosure is directed to a method and system to forcibly unregister and/or prevent registration of a gateway and/or other endpoint in a network region in response to a survivable gatekeeper servicing the network region becoming active.

Method to block split phone and gateway registration

Network timing is derived from the PSTN and distributed through the network to gateways capable of deriving timing from the incoming UDP stream. The derived timing has the correct frequency for voice telephony without using external timing sources or extraneous hardware components. For example, a digital signal processor (DSP) can derive the timing from a timed TDM bus and distribute messages, such as IP messages, to other gateways or port networks. The other gateways and port networks use the incoming stream to extract the timing which is then used to time their TDM bus. The port networks and gateways can also distribute other streams to other gateways in a fan-out type of arrangement. This internally generated timing can be used, for example, for Circuit Emulated Services (CES).

Network synchronization over IP networks

Growing community of inventors

Golden, CO, United States of America

Ted Morrow