Comments inline... Thanks & Regards, Nataraju A.B.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sachin Srivastava Sent: Monday, May 15, 2006 5:30 PM To: [email protected] Subject: [Sip-implementors] A Query from RFC 3262 Hi, I have a query regarding the following excerpt from the RFC 3262. "An element that can act as a proxy can also send reliable provisional responses. In this case, it acts as a UAS for purposes of that transaction. However, it MUST NOT attempt to do so for any request that contains a tag in the To field. That is, a proxy cannot generate reliable provisional responses to requests sent within the context of a dialog." [ABN] this may not be the complete answer to your question but partly goes like this... If this request is WITHIN a dialog, it does mean that the target is some downstream and hence only UAS can send any provisional responses reliably and proxies will do the functionality of 'proxy' alone. Q1. In which condition/scenario can a Proxy server send reliable provisional response? [ABN] If this is a request outside a dialog then it might so happen that proxy may need to send the provisional response before actually the UAS can reply to this request. For instance, consider the following scenario... 1. Proxy got multiple contacts to tryout after LS query (assuming this is a inbound-proxy) 2. Received user busy response from one of the contact, 3. User had set the call forwarding on busy feature. In this scenario proxy might decide to send the provisional response reliably to the caller and in the mean time it can retry to other contacts. [ABN] Please correct me if I am wrong here... Q2. Is there any specific implementation needed for Proxy from this RFC? [ABN] Not sure Thanks & Regards, Sachin Srivastava _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
