Hi Bogdan, Many thanks for your immediate help:) Best wishes, Chen-Che -- View this message in context: http://opensips-open-sip-server.1449251.n2.nabble.com/invoke-set-rtp-proxy-set-upon-the-failure-of-a-call-setup-tp7589572p7589601.html Sent from the OpenSIPS - Users mailing list archive at Nabble.com.