Dear Henning,    Thanks for your quick response you are right ,Freeswitch did't receive ACK from Kamailio , So freeswitch continuously sending 200 to kamailio then hangup the call i fixed this issue thanks. Regard's Murugan Pandian  ---- On Thu, 05 Mar 2020 00:38:30 +0530 Henning Westerholt &lt;hw(a)skalatan.de&gt; wrote ---- Hello Murugan,   this „call ends after 30s” sounds a bit like a missing ACK in the SIP signalization. Make a SIP trace (ngrep, wireshark etc..) and see if the signalization is correct.   Cheers,   Henning   -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com/   From: sr-users <mailto:sr-users-bounces@lists.kamailio.org> On Behalf Of Murugan Pandian Sent: Wednesday, March 4, 2020 2:07 PM To: sr-users <mailto:sr-users@lists.kamailio.org> Subject: [SR-Users] Kamailio Websocket Module call hangup issue with freeswitch   Hello,         We are using Kamailio as a register freeswitch as a Media server for SIP its working fine with out any issue. But when we use Websocket module (WebRTC) i can able to register and make call , Even call also connected from browser to PSTN but call will disconnect after 30 seconds look like ICE gathering issue can i know its NAT issue Proxy issue.     Regard's Murugan Panidan