Hopefully there's still someone checking this sub-forum every once in a while who may have some insight into this. I've got an IDS 108 installed in my museum of PBXs, pieced together from parts found at work (I work for a former long time Executone dealer) and have it working the way I like however I'm running into an odd issue that I've exhausted my troubleshooting steps in trying to solve. ACPU is running Eclipse 3.0, InfoStar EVX running 7.5. PRI card installed and connected to my PBX museum network with calls working in/out.
The issue is the system resets itself at fairly frequent but random intervals. Anywhere between an hour to 6 hours. Active calls drop, the keys blink on the phones for about half a second and the EVX card reboots shortly after. I've tried a process of elimination to see if it's one particular card causing the issue, starting with running the system without the voicemail and so far I haven't been able to find a culprit. These systems came long before my time so I'm unsure if there's any sort of diagnostics or logging in the ACPU that may help find the cause.
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I think I may have come up with something, but it's going to take a while to see if it had the intended effect. The manuals describe a flag in the S/W Diagnostics (N menu from the Ctrl-C menu) that when set to Y disables the system resetting every 3 hours when it's idle. I have changed this to Y, and the system held a call up for nearly 12 hours before releasing it but rather than being released due to a system reset, it looks like it was intentionally released by the call processing software.
My testing method has been to leave a phone off hook on a call with a DN on my network that plays streaming radio. When the system would hard reset, the display would get stuck at "Executone Info" until placed back on hook. Since I changed the flag in the S/W DIagnostics menu, it held the call for many hours and when I found the call released the display had the current time, the words **Line Released** and a reorder tone in the handset. This seems like the call was intentionally disconnected due to a time limit or something.