Maybe comfort noise will help you achieve what you are trying to do here? https://freeswitch.org/confluence/display/FREESWITCH/bridge_generate_comfort... https://freeswitch.org/confluence/display/FREESWITCH/send_silence_when_idle Thanks, Branden From: FreeSWITCH-users <freeswitch-users-bounces@lists.freeswitch.org> On Behalf Of sagar malam Sent: Monday, October 08, 2018 8:04 AM To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org> Subject: [Freeswitch-users] No RTP after unholding call Caller A and Caller B are on call.Caller A puts call on hold for 2 mins.During these 2 mins FS does not send any RTP to firewall due to which firewall closes RTP port of caller A due to udp inactivity can we configure FS to send something like empty RTP to caller A ? I did not find any settings in wiki Thanks in advance