I have never dealt with ACA before. Today I had someone complain they were getting calls from ACA Long several times through out the day but when he answered no one was there. I searched this forum and found the answer I needed to stop these "prank" calls. But I am curious how this tool can be used. We occasionally have e911 trunks "lock up" for some reason and AT&T will call us about it. We can free up the trunks by busing them out and then releasing them. When the trunks lock up the show "in-service/busy" when the status trunk command is ran. I was wondering if ACA might be able to be used as an "early notifier" for this problem.