Hello Hamed, i’d suggest looking at the media transport level (like SDP, RTP) in this question and compare to the previous browser version. Also have check the browser debug console out. Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com *From:* sr-users <sr-users-bounces(a)lists.kamailio.org> *On Behalf Of *Hamed Rastegar *Sent:* Wednesday, September 16, 2020 10:34 AM *To:* sr-users(a)lists.kamailio.org *Subject:* [SR-Users] webrtc sound problem in version 85.0 google chrome version Hello I am using kamailio 5.1 for WebRTC (websocket) But in the latest version of Google Chrome (85.0) I have a problem, No sound is transmitted between the source and the destination. This problem does not exist in Firefox browser If you have experience in this field, please comment _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users