Hi All, I want to change the timer B of INVITE Client Transaction. So I set following in conf/sip_profiles/external.xml <param name="timer-T1X64" value="4000"/> Restarted freeswitch and observed following debug line in logs 2018-05-10 16:57:43.799719 [DEBUG] sofia.c:4629 timer-T1X64 [4000] However, INVITE Client Transaction is not timing out in 4 sec. It still takes 32 sec to timed out. What could be the reason? Did I miss anything? Btw I am using external Lua client to control the freeswitch call flow. My Lua script connects to freeswitch over ESL connection and fires following command to make outbound call [DEBUG Thu May 10 17:00:17 2018] : command for outbound call is: lua ~freeswitch.Session('{origination_uuid=197422a3-e29e-452a-bf4e-86a6895a8cd5,sip_invite_route_uri=<sip:148.147.174.99;lr=on;ftag=K9ZF9aXv8ra1e>}sofia/external/ sip:18447770001@domain.com', freeswitch.Session('0b4aaab6-cee8-1236-d897-005056b308ba')) 0b4aaab6-cee8-1236-d897-005056b308ba is call-id of my incoming call to freeswitch. I am using following version of freeswitch freeswitch@as80> version FreeSWITCH Version 1.8.0~64bit ( 64bit) -- BR, Atul