1. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 1 SIP Call Flows Changes and Plan draft-ietf-speermint-voip-consolidated-usecases.txt Adam Uzelac - Global Crossing Rohan Mahy - Plantronics Yiu L. Lee - Comcast Cable Communications David Schwartz - Kayote Networks Eli Katz - Xconnect Global Networks Otmar Lendl - enum.at GmbH

2. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 2 Note Well All statements related to the activities of the IETF and addressed to the IETF are subject to all provisions of Section 10 of RFC 2026, which grants to the IETF and its participants certain licenses and rights in such statements. Such statements include verbal statements in IETF meetings, as well as written and electronic communications made at any time or place, which are addressed to: –the IETF plenary session, –any IETF working group or portion thereof, –the IESG or any member thereof on behalf of the IESG, –the IAB or any member thereof on behalf of the IAB, –any IETF mailing list, including the IETF list itself, any working group or design team list, or any other list functioning under IETF auspices, –the RFC Editor or the Internet-Drafts function Statements made outside of an IETF meeting, mailing list or other function, that are clearly not intended to be input to an IETF activity, group or function, are not subject to these provisions.

3. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 3 Impetus Renewed focus on Use Cases, and from that unique requirements will be captured. There were 4 (now 5) different documents that were attempting to capture the same data-set. Separate VoIP and Presence/IM Use Case “buckets”

4. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 4 Plan Create common Terminology Create a common “feel” for VoIP Use Cases Capture nuances and differences

5. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 5 Use Case Categories Direct Indirect Assisted

6. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 6 Direct Direct peering describes those cases in which two service providers interconnect without using an intervening layer 5 network.

7. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 7 Indirect Indirect, or transit, peering refers to the establishment of a secure signaling path via one (or more) referral or transit network(s). In this case it is generally required that a trust relationship is established between the originating service provider and the transit network on one side, and the transit network and the termination network on the other side, so there is no requirement for a trust relationship directly between the originating and terminating networks.

8. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 8 Assisted In this case, some entity employs a central SIP proxy (which is not itself a VSP) to facilitate direct calls between participating networks.

9. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 9 Federations A federation is a group of SPs which agree to receive calls from each other. A Federation may use a Peering Service Provider, (in any modes Direct, Indirect, Assisted) to facilitate some or all of the Assisted Peering services.

10. IETF-68draft-ietf-speermint-voip- consolidated-usecases.txt 10 Open Issues There are some nits that folks have brought to my attention (typos and references that are in need of updating) More detail on nuances between the different use cases.