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Re: [Enum] I-D Action: New draft - draft-bellis-enum-send-n-00
Lawrence Conroy said:
> Scott has released a draft of rfc3761bis-03.
> NOTE WELL - this has NOT changed the applicability text of 3761 at all.
> Dialing Plans are specifically excluded from ENUM. Thus before the
> esteemed SIP aficionados dive in, ENUM is about numbers, not dialed
> digit strings.
Agreed. This isn't about dialling plans, but about incomplete E.164
numbers. These aren't the same thing.
Simple example: I pick up my office phone and dial 97222. The dialling
plan tells the phone to make an ENUM lookup for +44207222. Someone in the
USA picks up their phone and dials 01144207222. Their phone should be
looking up the same record. Dialling plans are about the difference between
what the two of us dial. This proposal is about the fact that +44207222 is
an incomplete number.
> An ENUM client is also expected to make an ENUM query only where it
> believes it has a complete E.164 number. RFC 3761 goes on to accept
> that a client may not know what constitutes a valid E.164 number (some
> of us call outside the NANP :).
But this is circular. What you're demonstrating is that 3761bis needs to be
*extended* to cope with incomplete numbers.
> In principle only having a partial view of global number plans is not
> good enough. The idea of provisioning every nation state's number plan
> locally into every switch is surely not what was meant. **
Nor is it anything to do with this proposal.
> However, it is pushing this a bit far to send out an ENUM query with a
> partially collected number, in the expectation of getting back an ISUP
> SND style response. This is not something the originating node
> believes is a complete number - it's something it suspects isn't.
Actually, it's something that it doesn't know whether it's a complete
number or not. Which is why "yes it is" or "SND 4" are both sensible
answers.
--
Clive D.W. Feather | Work: <clive at demon.net> | Tel: +44 20 8495 6138
Internet Expert | Home: <clive at davros.org> | Fax: +44 870 051 9937
Demon Internet | WWW: http://www.davros.org | Mobile: +44 7973 377646
THUS plc | |
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