Hi, I would suggest you do validation first, and if it succeeds, you send 180 Ringing. But sending 4xx after a 180 is legal. Best example for that is 487 Request Terminated after the caller receives 180 Ringing and sends a CANCEL.
Balint On 13/09/2013 13:14, Kumar, Puneet (Puneet) wrote: > Hi All, > > Can any UAS send 18x response then a 4xx response ? > > Does any section of RFC violate it ? > > In my case a UAS is sending a 180 Ringing followed by a 480 response as it do > not support "sips" URI. > Should I honor this 480 response & retry? > > Thanks, > Puneet > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
