Patent ID: 8401169

Claim:
A method of delivering ringback audio content, the method comprising: receiving a connection request at an originating servicing call session control function network element, the connection request indicating that a caller device has placed a call to a destination device associated with a ringback audio content service subscriber; receiving a plurality of naming authority pointer records at the originating servicing call session control function network element from a telephone number mapping server, wherein the naming authority pointer records include a plurality of ringback audio uniform resource indicators associated with the destination device, and wherein each ringback audio uniform resource indicator includes a sequence indicator that identifies a sequence of the ringback audio uniform resource indicators; modifying the connection request to include the plurality of ringback audio uniform resource indicators; adding, at a terminating servicing call session control function that communicates with the destination device, a first ringback audio uniform resource indicator of the ringback audio uniform resource indicators to a ringing message from the destination device, wherein the adding is based upon the modified connection request; and supplying the first ringback audio resource indicator to the caller in response to receiving the ringing message.