Hi, I'd like to ask a couple of follow-on questions to this.
When a proxy receives a message (e.g. INVITE) with a SIP URI containing an embedded tel URI, and that embedded tel URI has parameters, how is this handled when: 1. The proxy DOES NOT serve the domain in the SIP URI? I think the answer has to be that it simply routes on the domain, and completely ignores the left hand side of the URI. I.e. it does not even look at the embedded tel URI nor its parameters. 2. The proxy DOES serve the domain in the SIP URI? I'd think that in this case since it needs to process the left hand side, that it would take into account also the parameters of the embedded tel URI. Is this correct? Does anyone know of a reference for these? (I think the first case is clear in RFC 3261, not sure about the second one though.) Thanks! Hi, You can refer to Section 9 in RFC 3966. It mentions: "Unless a SIP UA connects directly to a PSTN gateway, one of the SIP proxy servers has to translate the "tel" URI to a SIP URI, with the host part of that URI pointing to a gateway. Typically, the outbound proxy server, as the first proxy server visited by a call request, performs this translation. A proxy server can translate all "tel" URIs to the same SIP host name or select a different gateway for different "tel" prefixes, based, for example, on information learned from TRIP [RFC3219]. However, a proxy server could also delegate this translation task to any other proxy server, as proxy servers are free to apply whatever routing logic they desire. For local numbers, the proxy MUST NOT translate "tel" URIs whose contexts it does not understand." So, as stated above, the proxy can use any mechanism (e.g ENUM) or delegate this task to perform the URI translation task. Regards, Gaurav -----Original Message----- From: sip-implementors-bounces at cs.columbia.edu <https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors> [mailto:sip-implementors-bounces at cs.columbia.edu <https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors>] On Behalf Of Daisaku Shuwa Sent: Friday, February 10, 2006 4:20 PM To: sip-implementors at cs.columbia.edu <https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors> Subject: [Sip-implementors] Proxy handling tel uri?? Hi there; Is there any spec on how proxy should handle tel uri and its parameters? regards Daisaku = = = = = = = = = _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
