On Thu, 2009-02-26 at 11:27 +0000, Gabor Paller wrote:
> " Interpreting the user-part (left of the '@') in a sip url is not
> possible unless you are authoritative for the domain part (the right
> side). Many implementations attempt to do this, but it's wrong - no
> matter what other attributes there are."
>
> My experience is that the telecom community is obsessed with numbers,
> numbering plans and so on and does not want to grasp that SIP URIs have
> two parts, user and domain. They want to do everything based on
> "numbers" and forget the domain.
One of my mothers favorite sayings:
Wish in one hand and spit in the other and see which one fills
up first.
(charming, eh?)
"Want"ing it to work some way other than how it really does won't change
it. This is fundamental to SIP (indeed to any Internet technology).
You wouldn't think of trying to deliver email based only on the local
part (where would you deliver email to "xmlscott"?).
> >From the interoperability point of view, they are right as all the other
> systems they have are based on "numbers".
Not really - they are based on numbers in some context; it's just that
in the PSTN the context is always implicit (the dial rules for the thing
your phone is connected to). You wouldn't expect the same dial string
to work from any phone anywhere - I need to dial a different 'number' to
dial my home from my next door neighbors house or my uncles house in
another state.
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