The Digital Emergency Alert System (DEAS) was a system managed by the Federal Emergency Management Agency (FEMA) and designed to alert first-responders and civilians in the event of a national emergency. It was based upon and supplemented the Emergency Alert System (EAS) by sending out text, voice, video, and other digital messages to mobile phones, pagers, radios, and televisions.
Although the Emergency Alert System and its predecessor, the Emergency Broadcast System and an even earlier predecessor CONELRAD, have always allowed the transmission of both video and audio, there have been limitations that would be eliminated by the DEAS. For example, the DEAS allowed the ability to broadcast "bottomless" audio messages (i.e. a message with no definite ending) and streaming video. It also allowed near-instantaneous transmission without the delays that occur as EAS alerts trickle through the system.[1]
^Sarkar, Dibya (2005-04-11). "FEMA tests digital alert system - Technology will send messages to wireless devices, radio, TV and the Internet". Federal Computer Week. Archived from the original on 2008-09-07.
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