> If suppose first INVITE message and To header are of > tel URI type. And the server responds with 416. Should > we not be changing the To header from tel URI to > SIP URI in this case?
According to RFC 3261, the request-URI was the issue. As section 8.1.3.5 indicates, the To SHOULD be the same. However if you want to change the To URI (and/or From URI), I recommend changing the Call-ID since you are effectively acting more like a 3xx processing option (section 8.1.3.4) which indicates that the Call-ID MAY change. RFC 3261 is underspecified concerning the topic since the UAC and proxies theoretically have no idea which request-URI caused the issue. For instance, "tel" might be supported; however the proxy forwarded the call to another server using a "foo" request-URI scheme. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
