alarm

Alert, Locate, and Report Missiles.

An audible or visual signal at a device, such as a display station or printer, that is used to notify the user that a predefined condition exists. In IBM® Lotus® Notes®, text that displays or a noise that sounds to remind you of an entry on your Calendar. When an alarm goes off, Notes shows a description of the Calendar entry associated with the alarm.

An item that watches a single metric over a specified time period, and triggers an Amazon SNS topic or an Auto Scaling policy if the value of the metric crosses a threshold value over a predetermined number of time periods.

An alerting indication to a condition that may have immediate or potential negative impact on the state of the monitored network element (NE). [T1.226-1992]