Patent ID: 8160068

Claim:
A system for facilitating communication between a cable modem termination system (CMTS) and a voice over IP (VoIP) application server in a cable network comprising: a VoIP enabled-customer premises equipment (CPE) connected to the cable network via a cable modem (CM), wherein the CM comprises subscriber-identifying information; and the CMTS comprising a CMTS interface and CMTS-identifying information, wherein the CMTS comprises instructions for: receiving an IP address-port number tuple of the VoIP application server from an application server datastore; receiving at the CMTS interface a packet from the VoIP-enabled CPE, wherein the packet comprises a header comprising a destination IP address-port number tuple; determining when the destination IP address-port number tuple of the packet matches an IP address-port number tuple of the VoIP application server; and when the destination IP address-port number tuple of the packet matches the IP address-port number tuple of the VoIP application server, then: modifying the header of the packet by adding the CMTS-identifying information and the subscriber-identifying information; and sending the modified packet to the destination IP address-port number tuple.