This is a revisit of an old topic with some additional information… in short, calls that come in and get transferred to a ring group that rings all the phones in a department are dropped. This happens infrequently, but in bursts: it’ll happen 2-6 times in 3 minutes, then not recur for another month. (Which makes for great fun troubleshooting.) The calls have never been dropped when transferred to an individual extension in the ring group. There is no commonality to the carriers used by people calling in that this happens to.
I realized something a couple days ago and discussed it with our operators, who confirmed my observation. All of the calls are from the morning… this ONLY happens between 8:45 and 9:15 am! None of the operators can recall a single instance of it happening outside that window. It’s happened on days that the phones have been dead & other times when we’ve been inundated with calls - call volume doesn’t seem to matter.
Thinking that there’s a job running at that time which is somehow causing this behavior, I loaded up the crontabs for both root & asterisk, confident that I would find something that runs around that time frame and that I’d finally be able to solve this lingering issue… only to find nothing that runs specifically at that time of day. There are cron jobs that run throughout the day, but nothing that runs specifically around that time.
As I mentioned in the thread, we’re stuck on an old version - we were sold the high availability while it was already being discontinued; management does not want to waste the money & I don’t want to lose the redundancy it provides. (The HA has already saved us several times.) Because of these factors, this certainly qualifies as a ‘legacy’ install.
I’d appreciate any advice / input on how to track down what’s happening in light of this new information regarding it only occurring in such a small window time-wise. My gut says something is being triggered on the server & having an unexpected effect on transfers, but don’t really know where else to look for something like this but in cron.