El Wednesday 05 March 2008 10:05:16 Iñaki Baz Castillo escribió: > El Tuesday 04 March 2008 19:07:14 Paul Kyzivat escribió: > > A UAS should not in general know whether it has been called by a gateway > > or some other sip device. And so it should not be adjusting its > > responses based on the kind of thing it thinks is calling. > > > > The response returned by the UAS should best reflect the condition at > > the UAS. The purpose of specs like 3398 is to specify how the sip codes > > should be mapped to/from the pstn by gateways, not to specify how other > > sip devices should behave. > > Thanks, I agree 100% with you, but the fact is that returning a 404 to a > gateway produces an unexpected behaviour in the caller (its PSTN provider > tell him in early media that the callee number doesn't exist). > > The question here (and I'm know more people wondering the same) is how to > differenciate a non existing user and an existing but not registered user. > A registrar will reply "404" in both cases, but 404 produces the wrong real > behaviour explained before. > > RFC 3261 says: > > -------------------------------------------------------------- > 404 Not Found > > The server has definitive information that the user does not exist at > the domain specified in the Request-URI. This status is also > returned if the domain in the Request-URI does not match any of the > domains handled by the recipient of the request. > -------------------------------------------------------------- > > The question is: does a non registered user "exist" or not?
After reading again I find "480" the best reply code whe the user does exist but it's not available: 480 Temporarily Unavailable [...] This status is also returned by a redirect or proxy server that recognizes the user identified by the Request-URI, but does not currently have a valid forwarding location for that user. While 404 means the user doesn't exist. 404 Not Found The server has definitive information that the user does not exist at the domain specified in the Request-URI. [...] Anyway, does someone know a proxy/location server that replies a "480" when an existing user is not registered? -- Iñaki Baz Castillo [EMAIL PROTECTED] _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
