Isn't the "Contact" header more appropriate for Uas to indicate
the transport preference? Contact headers turn into request-URIs on the
way back and the proxies and UAs route on request-URIs/Route headers,
right?. We would obviously use the Via headers to indicate TCP properly
(SIP/2.0/TCP) in the forward direction - guess there is no question
there.
--
Srini
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Stephen Paterson
Sent: Wednesday, January 16, 2008 10:51 AM
To: [email protected]
Subject: [Sip-implementors] Transport=tcp interop problem
Hi all,
When using TCP, we place 'transport=tcp' in both the To and From headers
and it is claimed that the presence of this in the From header is
invalid (interestingly the To header is not causing any grief). It seems
to me that the From and To headers contain URIs and transport=tcp is a
valid URI parameter so there should be no problem.
Can anyone clear this up as I can't find anything definitive in 3261?
Reference to the RFCs would be most appreciated.
Cheers
Steve
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