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

["Attila Sipos" <attila.sipos at vegastream.com>]

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 at lists.cs.columbia.edu
[mailto:sip-implementors-bounces at lists.cs.columbia.edu] On Behalf Of
Attila Sipos
Sent: 01 November 2007 08:52
To: sip-implementors at 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 at a.com calls B at 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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