Thanks Herle for your answer, And indeed I made it work using your scripts. Where you only rewrite SDP Offer on Orig Invite and SDP Answer on Terminating183 Session Progress. And where it does not work anymore when you try to rewrite SDP offer at both Orig and Term Invite and SDP Answer on both Orig and term 183 Session Progress. Which is what would happen when *IMS *core uses a separate VRF from access. But anyway, thanks for your answer and thank you for the dockerized environment you made available to test VoLTE with Kamailio.
Regards
Le dim. 12 mars 2023 à 13:01, Supreeth Herle ***@***.***> a écrit :