The first instance in the handling of alarms is the NE. Alarms are generated there and then handed over to the FOXMAN-UN.

The NE continuously monitors its input signals and detects if any of them are missing or faulty. Any alarms that are generated as a result of this supervision are stored in the on-board Logbook. They are then uploaded from there by FOXMAN-UN during the next poll of the NE and presented to the operator.