I would start by evaluating your design, you can get start-talking and stop-talking events from the event socket for the conference, you shouldn’t need to call in for that. https://freeswitch.org/confluence/display/FREESWITCH/mod_conference#mod_conf... From: FreeSWITCH-users [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Bilal Abbasi Sent: Thursday, May 17, 2018 14:10 To: FreeSWITCH Users Help Subject: Re: [Freeswitch-users] [VAD events][conference call] Anybody to help me with this please. Br Abbasi On Thu, 17 May 2018 at 3:14 PM, Bilal Abbasi <bilaln018@gmail.com<mailto:bilaln018@gmail.com>> wrote: Hi Users, I want to get the VAD events on a conference call, i want to join a conference call silently and just wanted to get vad events. What i did is to land the conference call in a context and run echo application.(as vad events appears on b leg) But that caused noise in conference, so i droped the rtp packets using iptables rules. Problem: Everything works great, but now i want to traverse in conference(like pin etc) and i send dtmf 2833 which also get droped by iptables. Question: is there a way i can get vad events and be as a silent listener of conference as well. P.S: previously i used originate conference and landed on park(), but that do not generate vad events. So i switched to echo() Regards Abbasi