On Wed, 2008-09-24 at 16:15 -0400, M. Ranganathan wrote: > If I send an ACK with no body when I see a 200 OK coming back from the > iTSP in response to the RE-INIVITE previously sent to it, with SDP > that does NOT include G711 ( which is what our park server wants ), > what does that signify? > > sipXbridge re-INVITE ( no sdp ) ---> ITSP > sipXbridge <---- ITSP ( OK G729 ) > sipXbridge ----> ACK (no SDP)
That's a protocol error -- a 2xx containing an offer must elicit an ACK containing a response. The problem is that there is no useful response that you can make. See section 2.2 of draft-ietf-sipping-sip-offeranswer-08 for a discussion of what to do. > I ask because I have also come across another flavor of ITSP that sends me > > sipXbridge re-INVITE ( no sdp ) ---> ITSP > sipXbridge <---- ITSP ( OK no SDP ) > > Which I assume is a protocol error (or is it?). Yes -- a 2xx response to an INVITE without an offer must contain an offer. Dale _______________________________________________ sipx-dev mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-dev Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-dev
