Subject: [SIP] Redirect - 305: Use Proxy

From: Buettner Werner <[email-masked]>
Date: Thu, 5 Apr 2001 16:31:36 +0200

Hello All

Here is a question which I have about the redirection response 305 use proxy.

If I have a redirect server, and an INVITE is received by this server, then the routing table could tell the server which address to use for the next hop.  This info is then passed back in a 3xx response, so that the UA (or requesting server) can resend the INVITE to the next hop.  305 seems a good one to be used, since the contact info about the user has not changed, only the info I have on where to go next.  But the specification confuses me on this point.  In bis02 it is stated that the 305 message MUST ONLY be generated by UAS.  Does this now mean that I as redirect server cannot use this response?  Or should one read the description of UAS/UAC in such a manner that a redirect server also fits the description.  The same question is also applicable if I have a proxy server which occasionaly does a redirection.

Thank you for your time.

Kind Regards

Werner Büttner

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