The device MA5633 is often offline and shows "Cause of last offline: Power abnormal". The question is if when the device go offline it reports an event or alarm in U2000 and where could this be seen?
1) Check the alarm history of the device
In history alarms is not event reported because of the fact that when a device go offline, it will not report any event or alarm on device. We should check the NMS alarm side, not NE alarm side.
2) Check the U2000 alarm logs