How can I monitor channel that "hangup"? I'm using asterisk 1.8.15.1 and there are many times that nobody is using the line but when I run: asterisk -rx "core show channels" it show: Channel Location State Application(Data) SIP/pstn-4444-000000 (None) Up AppDial((Outgoing Line)) SIP/pstn-9998-000000 7807586576 at internal: Up Dial(SIP/97807807586576 at pstn-4 2 active channels 1 active call How can I prevent it or monitor it? At this point I have to hang it up manually or I will not be able to restart the asterisk. -- Joseph