Hi All, I am using mod_fifo for park/unpark like application using diaplan below, everything works great, I am able to park/unpark calls, transfer back to the extension that parked the call on timeout and remove FS from signaling path after transfer using uuid_simplify. What I wasn't able to accomplish is to remove FS from signaling path after unparking the call, tried both uuid_simplify and setting sip_auto_simplify variable without luck. Any idea if this is possible? Thanks, George <extension name="ParkOrbitFull"> <condition field="destination_number" expression="^5555$"> <action application="set" data="fifo_music=${hold_music"/> <action application="set" data="fifo_orbit_exten=transferBack${sip_referred_by_user}:30"/> <action application="set" data="fifo_orbit_dialplan=XML"/> <action application="set" data="fifo_caller_exit_key=5"/> <action application="set" data="fifo_caller_exit_to_orbit=true"/> <action application="fifo" data="QPark5555 in"/> <action application="hangup"/> </condition> </extension> <extension name="UnParkFull"> <condition field="destination_number" expression="^\*45555$"> <action application="fifo" data="QPark5555 out nowait"/> </condition> </extension> <extension name="transferBack"> <condition field="destination_number" expression="^transferBack(\d+)$"> <action application="set" data="ringback=${us-ring}"/> <action application="bridge" data="{api_on_answer='uuid_simplify ${uuid}'}sofia/$${domain}/$1@$${domain}"/> </condition> </extension>