I have an exception rule created in CMS for all trunk groups to send out an exception if a trunk has been in use for more than 5400 seconds (90 minutes). Then I can chase down any thing that might come up and find out the reason why.
Not an answer to yoru question, but something that might help out.
Susan
“Before you criticize someone, you should walk a mile in their shoes.
Then, when you criticize them, you are a mile away ...
and you have their shoes.”