ENS (Emergency Notification Systems)

General category for any systems used to notify persons or devices of an emergency. May include changeable message signs, sirens, telephone and other media.
 * LAENS (Large Area Emergency Notification System): A communications system used by a public safety agency to notify people in a large area about an emergency condition.
 * WAENS (Wide Area Emergency Notification System): A communications system designed to deliver information (action or knowledge related) regarding a public safety, public service or emergency management event. Message recipients may include first responder staff from multiple jurisdictions, residents living in a small segment of a neighborhood/community or an entire county, motorists traveling on freeways or major thoroughfares or, quite simply, almost anyone anywhere.