> The above INVITE is getting 403 Failure response > telling Calling user is not registered. > Can this because of IP is different in Contact header?
Maybe. Some outbound devices have services to restrict call origination location. It could be using information from Contact, Via, SDP, et cetera to notice originating from an unexpected/unacceptable location. You might want to ask the operator or vendor who is returning the 403. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
