Method and system for identifying calls

1. A method of identifying a call, wherein at least a circuit-switched network element and a packet-switched network element are involved in said call, said method comprising:

in response to a request to originate said call, an originating network element assigning an internetwork call identifier to identify said call;

transmitting said internetwork call identifier between said circuit-switched network element and said packet-switched network element;

generating a first call record that indicates involvement in said call by said circuit-switched network element, said first call record including said internetwork call identifier to identify said call; and

generating a second call record that indicates involvement in said call by said packet-switched network element, said second call record including said internetwork call identifier to identify said call.

2. The method of claim 1 , wherein said circuit-switched network element is said originating network element, further comprising:

transmitting a signaling message to route said call from said circuit-switched network element, said signaling message including said internetwork call identifier and an originating network element identifier, wherein said originating network element identifier identifies said circuit-switched network element.

3. The method of claim 1 , wherein said packet-switched network element is said originating network element, further comprising:

transmitting a signaling message to route said call from said packet-switched network element, said signaling message including said internetwork call identifier and an originating network element identifier, wherein said originating network element identifier identifies said packet-switched network element.

4. The method of claim 1 , further comprising:

a media gateway converting media in said call between a first media format used by said circuit-switched network element and a second media format used by said packet-switched network element; and

generating a third call record that indicates involvement in said call by said media gateway, said third call record including said internetwork call identifier to identify said call.

5. The method of claim 1 , wherein said circuit-switched network element is a service switching point (SSP).

6. The method of claim 1 , wherein said circuit-switched network element is a mobile switching center (MSC).

7. The method of claim 1 , wherein said packet-switched network element is a voice-over-packet (VoP) gateway.

8. The method of claim 1 , wherein said packet-switched network element is a service node including at least one media resource.

9. The method of claim 1 , wherein said first call record includes an identifier of said circuit-switched network element.

10. The method of claim 9 , wherein said first call record identifies said originating network element for said call.

11. The method of claim 9 , wherein said first call record identifies an ingress trunk group carrying said call to said circuit-switched network element.

12. The method of claim 9 , wherein said first call record identifies an egress trunk group carrying said call from said circuit-switched network element.

13. The method of claim 1 , wherein said second call record includes an identifier of said packet-switched network element.

14. The method of claim 13 , wherein said identifier of said packet-switched network element includes an Internet Protocol (IP) address of said packet-switched network element.

15. The method of claim 13 , wherein said second call record identifies said originating network element call record for said call.

16. The method of claim 13 , wherein said second call record includes a source address of packets that said packet-switched network element received for said call.

17. The method of claim 13 , wherein said second call record includes a destination address of packets that said packet-switched network element transmitted for said call.

18. The method of claim 13 , wherein said second call record identifies an application that said packet-switched network element used to process said call.

19. The method of claim 18 , wherein said second call record includes a Uniform Resource Locator (URL) associated with said application.

20. A system for managing call records, comprising: a record repository for storing call records, wherein said call record repository is communicatively coupled to at least one circuit-switched network element and to at least one packet-switched network element, said call records including circuit-switched call records associated with said at least one circuit-switched network element and packet-switched network call records associated with said at least one packet-switched network element, wherein distinct calls are identified in said call records by distinct internetwork call identifiers; a retrieval application for retrieving call records from said at least one call record repository; and a processing application for correlating, based on internetwork call identifier, call records retrieved by said retrieval application.

21. The call record management system of claim 20 , further comprising a call record formatter for formatting call records stored in said call record repository.

22. The call record management system of claim 20 , further comprising:

a user interface, coupled to said retrieval application, for receiving requests to retrieve call records.

23. The call record management system of claim 20 , further comprising:

a billing application for retrieving and processing call records for a billing system.