RE: [Sip] namespaces in RFC 4411, 4412 and draft-ietf-sip-rph-new-namespaces-00

Hi,

I have tried asking these questions on SIP-implementors
but not getting any responses.  Are these silly questions...?

-----Original Message-----
From: sip-implementors-bounces@lists.cs.columbia.edu
[mailto:sip-implementors-bounces@lists.cs.columbia.edu] On Behalf Of
Attila Sipos
Sent: 01 November 2007 08:52
To: sip-implementors@lists.cs.columbia.edu
Subject: [Sip-implementors] namespaces in RFC 4411,4412 and
draft-ietf-sip-rph-new-namespaces-00

Are namespaces just a way to group together different users across
different DNS domains?

What if a.com is using namespaces "dsn-000000" to "dsn-000009"
and b.com is using the same namespaces?
Then if A@a.com calls B@b.com, wouldn't the namespaces interfere?

What looks after or checks the namespaces?
Is it that a proxy knows what everyone's namespace should be?
So if someone wants to do "UA Preemption" and tries to use a resource
priority level higher than they should have, then will the domain's
proxy downgrade it back to the correct permitted level?

Regards,

Attila

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