Hi, We now have a fair amount of guidance on how to work with other SDO's in general, which would certainly include ITU-T. Just to summarise: "IAB Processes for Management of IETF Liaison Relationships," BCP 102, RFC 4052, April 2005. "Procedures for Handling Liaison Statements to and from the IETF," BCP 103, RFC 4053, April 2005. "Guidelines for Acting as an IETF Liaison to Another Organization," RFC 4691, October 2006. We also have some specific guidance on extensions, when another SDO sees a need for IETF protocols to be extended to meet their system requirements: draft-carpenter-protocol-extensions-04.txt (approved as a BCP, in RFC queue). A lot of IEPREP work seems to belong in the extensions category. The question in my mind is whether the IEPREP work items are in the category where we can be confident that these mechanisms are sufficient (i.e., we can rely on another SDO to provide realistic requirements in the form of liaisons) or whether we need the requirements to be developed in the IETF to get them right (i.e., realistic in terms of what Internet technology can actually achieve). I think the history of work related to IEPREP shows that it's all too easy for people steeped in the connection-oriented world to come up with unrealisable requirements for a packet network. Brian _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf