Patent ID: 8667150

Claim:
A method for processing a session request in a packet network, comprising: receiving, by a processor, the session request; querying, by the processor, a telephone numbering mapping server for a called party of the session request; determining, by the processor, if a naming authority pointer resource record associated with the called party is received from the telephone numbering mapping server; forwarding, by the processor, the session request to a circuit switched network if the naming authority pointer resource record is not received from the telephone numbering mapping server; determining, by the processor, a session description protocol value of the session request if the naming authority pointer resource record is received from the telephone numbering mapping server, wherein the session description protocol value defines a type of service; and processing, by the processor, the session request in accordance with the session description protocol value if the naming authority pointer resource record is received from the telephone numbering mapping server, wherein the processing the session request comprises forwarding the session request towards the called party over the packet network if the session description protocol value of the session request is for a service provided over the packet network.