It may be a good idea to expand on the registration section in the 
call-flows document and illustrate message interactions for some of the 
trust combinations to supplement the description in the RFC.

regds
arjun

--
Arjun Roychowdhury @ Hughes Software Systems
11717 Exploration Lane, Germantown MD 20876
(O): 301-212-7860        (M): 240-997-0066




"Brett Tate" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
08/14/2002 04:49 PM
Please respond to brett

 
        To:     "'Clendenan, Dave'" <[EMAIL PROTECTED]>, 
<[EMAIL PROTECTED]>
        cc: 
        Subject:        RE: [Sip-implementors] Third-Party Registration 
call flow example


> Do any of you have call flow examples 
> of Third-Party registration that you
> could share?

It is the same as a normal registration except 
the From reflects the sender and the To reflects 
the party for which the contact modifications 
should apply. 

The authentication and trust relationships
can produce various deferent call flows.
The typical case would be to send the REGISTER
to the To's registrar.  It would challenge
the request using the To party's authentication 
credentials. 

Other flows might involve only/additionally
a proxy authentication based upon the From 
party.  These might involve the From party's
proxy or a 3rd-party authentication validator.

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