Hi, Call flow is as mentioned A —> Switch —> B All 3 nodes connected with SIP connectivity. A sending INVITE to B but does not contain Require:100REL. Switch forwards Invite to B but has Require:100REL. B responds with 180 without SDP, Switch forwards the same to A. B then sends 183+SDP, which switch sends to A. Then A sends 200OK which Switch does not forward to A. B sends 200OK multiple times as per standard and Switch disconnects session at both the ends with SIP cause code 500.
Seeking reason for such behaviour. Best Regards, Abhishek Phadke +91 9819818418 _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
