Digital Alert Systems
EAS HOME : ABOUT EAS <- You Are Here 

Emergency Alert Systems


HISTORY- The current Emergency Alert System (EAS) is an outgrowth of the need to notify the public dating back to 1951, with the establishment of CONELRAD. In 1963 this was replaced by Emergency Broadcast System (EBS), which included the two-tone alert signal. In 1990 President Bush (#1) directed that a system be put in place so that national emergencies could be quickly communicated with the public. This resulted in the current EAS, which brought in broadcasters (1997), large cable systems(1998), small cable sytems(2002, with some waivers out to 2005) and finally satellite and IPTV providers (2007).

REQUIREMENTS- The FCC has outlined in their Part 11 document both the essential operational features of the EAS Encoder/Decoder and the responsibility of the participants. In short your Emergency Alert System must have a certified Encoder/Decoder (or optional Decoder only for systems under 5,000 suds), monitor a primary (LP1) and secondary (LP2) radio station, based on your locale and as assigned in your state EAS plan. It must respond to and pass through a required weekly test (RWT), required monthly test (RMT) and a national emergency (EAN). All other alert types, including weather, Amber, Local, etc., are not mandated by the FCC and are done as a company policy or as requirement of a particular franchise agreement. Events must be logged, either electronically or in print and be available for an FCC inspector. An EAS handbook is available from the FCC here.

Copyright © 1999-2022 Digital Alert Systems Inc., All Rights Reserved