Hi I'm using asterisk 1.8.7.0 on a ContOS 5.6 machine Earlier today I spotted multiple occurrences of the following type of warning handle_response_invite: just did sched_add waitid(1955858) for sip_reinvite_retry for dialog etc... I recognised this as a hung channel, which I've not had since upgrading from 1.8.3.2 When I found the hung channel I noticed the following in the channel info Blocking in: ast_waitfor_nandfds Luckily this hung channel was able to be cleared by doing a channel request ahngup but I was wondering if anyone could shed some light on the issue Thanks in advance Ish -- Ishfaq Malik Software Developer PackNet Ltd Office: 0161 660 3062