I am having complaints of out CIX670 System "rebooting" suddenly during the day.

Users notice it by droping the current call, and/or hearing a Clicking noise on there DKT's as if they are being unplugged and then re plugged in.

CIX is on a network connected UPS and it is not having any Power issues.

Any suggestions on where to look in Emanager for a log file?
Power supply issue?
Something else?

Could be a PSU in one of the cabinets.
The other thing to try is unplug the CPU LAN cable from the network and monitor to see if it continues or not to reboot (I have had systems reboot when being UDP flood DDoS attacked)