Patent ID: 7363381
Filing Date: 2008-04-22
Classification: H04L

Abstract:
1. An apparatus comprising: a proxy device configured to support a first protocol for initiation, maintenance, and termination of a communication session between call endpoints, and to support a second protocol for resolving endpoint addresses for the communication session, wherein the proxy device resolves an endpoint address of an endpoint in an egress network in response to receiving a call setup request from a first endpoint in a first network, wherein the call setup request is received via an ingress gatekeeper in an ingress network; a directory gatekeeper configured to receive a location request message from the proxy device, the location request message requesting address information related to the endpoint in the egress network, the directory gatekeeper further configured to request the address information from an egress gatekeeper in the egress network and return the address information to the proxy device, wherein the directory gatekeeper and the proxy device are located in a call routing infrastructure between the ingress network and the egress network, and wherein the egress gatekeeper is associated with a technology prefix that is used to indicate that the egress gatekeeper is the particular egress gatekeeper to be used to complete the call.