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Emergency notification system
An emergency notification system is a method of facilitating the one-way dissemination or broadcast of messages to one or many groups of people, alerting them to a pending or existing emergency.
== Notification vs. communication ==
Emergency notification systems constitute a (one-way communication) subset of the types of systems describe by the broader term emergency communication systems which includes systems that provide one-way and two-way communications, between emergency communications staff, first responders, and impacted individuals. Mass automated dialing services such as Reverse 911, and the common town siren systems that are used to alert for tornadoes, tsunami, air-raid, etc., are examples of emergency notification systems.
Many local governments and organizations that hold large, public events are adopting emergency notification systems in order to notify large groups of people in the event of an emergency. For example, in 2013, the very popular Dallas YMCA "Turkey Trot" added a new alert system called RedFlag to the race that 40,000+ people participate in on Thanksgiving.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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