Patent ID: 7565448
Filing Date: 2009-07-21
Classification: H04L

Abstract:
1. A network control system comprising: a first interface configured to receive an update message, wherein the update message indicates a status change of a first gateway of a plurality of gateways, and wherein the plurality of gateways provide an interface between a synchronous network and an asynchronous network, and receive a call request for a call from the asynchronous network to a destination in the synchronous network; and a processing system configured to update a routing table based upon the status change indicated in the update message, wherein the routing table indicates a status of each of the plurality of gateways and a distance vector associated with each of the plurality of gateways, and process the updated routing table to select a one of the plurality of gateways through which to route the call based on the status of each of the plurality of gateways and the distance vector associated with each of the plurality of gateways, wherein the routing table comprises a Telephony Routing over Internet Protocol (TRIP) routing table.