Patent ID: 8345667

Claim:
A method of establishing a connection between a Public-Switched Telephone Network and an Internet Protocol network, the method comprising: receiving a Dual Tone Multi-Frequency signal corresponding to a dialed sequence at a port of a network access device, the port having a first numerical sequence associated therewith; identifying the dialed sequence as a request for a specified service, wherein the specified service is different than a connection with a port associated with the dialed sequence; populating an origination field of a session initiation protocol message with the first numerical sequence; populating a destination field of the session initiation protocol message with a second numerical sequence that is different from the dialed sequence responsive to identifying the dialed sequence as the request for the specified service; and transmitting the session initiation protocol message including the first numerical sequence and the second numerical sequence from the network access device to a server over a packet-switched network to request the specified service.