Fast blinking yellow indicates that the card is in the boot state. Red Solid red indicates that the card is in the Reset state, the card has failed, or a back card is missing. Blinking red indicates that the card is downloading new software. Blue Blue indicates a critical alarm in the node, which results from a loss of service. For example, a broken trunk cable generates a critical alarm.
Immediate action is required.
Red Red indicates a Major Network alarm in the node. A Major alarm is used when there is severe degradation in service. Urgent action is required to recover this service. Yellow Yellow indicates a Minor Network alarm in the node. A minor alarm is used when a non-service affecting condition has occurred.