Agreed that a charter probably isn't the right place to explain in detail
the delineation between ENUM, TRIP, SIP server location via DNS, and so
on. Personally, I think the text suggested by Jonathan below is useful,
but a more complete description of the difference between these
mechanisms is warranted. An Informational-track document explaining all
of this would be nice - I worked on something along these lines, though I
never completed it (I needed to add text about TRIP). If we need a WG to
take responsibility for producing such a document, I agree that IPTEL
would be a good choice.
Randy had a very short one published as draft-ymbk-enum-trip (July 2001).