Hello, I need to get Freeswitch to detect when the caller has hang up, so it will hang up the ilne also. Especially important for when the caller has left a message, although ideally it should work for all calls. With Asterisk this required the use of automatically detecting the busy signal, at the driver level. How can I do something similar with Freeswitch? Some web pages suggest I use this: <action application="tone_detect" data="busy 425 r 0 hangup 'normal_clearing' 3"/> Unfortunately this has the side affect that it answers the call, I don't want to change the answer behaviour, only the hang up behaviour. 2010-02-27 14:27:52.655081 [DEBUG] switch_core_session.c:1728 Application tone_detect Requires media! pre_answering channel OpenZAP/3:1/0397551926 I also see this message, but so far no solution: http://lists.freeswitch.org/pipermail/freeswitch-users/2008-July/004567.html How do I do this? Thanks -- Brian May <brian@microcomaustralia.com.au>