Three levels of escalation provide up to three opportunities to re-route an alarm notification if the alarm remains unacknowledged:

Each level may be routed to a different alarm recipient. So that if an alarm remains unacknowledged long enough, it may be sent to as many as four different recipients (including the original recipient). If a recipient acknowledges an alarm at any level, the system does not escalate the alarm to the next Level.

In addition to having an Enable property, each alarm escalation level has a Delay property that allows you to set the amount of time that you want to allow an alarm to remain at any level before it is moved to the next escalation level.