Contact header in 200 OK

sandip gangakhedkar <[email protected]>
Newsgroups gmane.ietf.sip
Message-ID <[email protected]>
Hi all,

I'd like to know if the Contact header is mandatory for a 200 OK response to
an INVITE request.

The RFC doesnt explicitly mention anything in this regard although a 200 OK
is mandatory for a REGISTER request.

If the originating endpoint receives the Contact header in the 180 Ringing
response (which I assume is mandatory), then it knows the location of the
remote endpoint, in which case the Contact header would be redundant in the
200 OK response.

Waiting for some expert intervention.. :)

Regards,
-- 
Sandip Gangakhedkar
Mobile:+91-97396-99916
Office: +91-80-4363-3899
Profile: http://www.linkedin.com/in/sandipg

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