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The familiar tones that called Station 51 into service were initiated by dispatch using a Motorola Quik Call I unit, a radio listening on a common paging frequency for a pair of special audio tones assigned to that station. For a large incident, one could often hear many sets of tones calling many stations, but only a specific pair would sound ...
Specific Area Message Encoding (SAME) is a protocol used for framing and classification of broadcasting emergency warning messages. It was developed by the United States National Weather Service for use on its NOAA Weather Radio (NWR) network, and was later adopted by the Federal Communications Commission for the Emergency Alert System, then subsequently by Environment Canada for use on its ...
The FCC issued several fines relating to EAS tone usage in August 2019, including ABC being fined $395,000 for using wireless emergency alert tones multiple times during a Jimmy Kimmel Live sketch, AMC Networks being fined $104,000 for using the tones in The Walking Dead episode "Omega", Discovery Inc. being fined $68,000 for including footage ...
Decoders at relay stations would sound an alarm, alerting station personnel to the incoming message. Then, each relay station would broadcast the alert tone and rebroadcast the emergency message from the primary station. The Attention Signal was developed in the mid-1960s.
The use of flashing lights and sirens is colloquially known as blues and twos, which refers to the blue lights and the two-tone siren once commonplace (although most sirens now use a range of tones). In the UK, only blue lights are used to denote emergency vehicles (although other colours may be used as sidelights, stop indicators, etc.).
A limitation of the Local Access Alert system is that operators have to dial out to end transmission. Simply hanging up the phone connected to the system after an emergency broadcast does not work, and viewers may hear other phone noises – such as off-hook tones or dial tones – before cable programming resumes.
The FCC says it received complaints about ESPN transmitting or simulating EAS tones, which ESPN admitted to doing six times on the dates of Oct. 20-24, 2023.
National Emergency Messages are treated the same as any other message transmitted over the Emergency Alert System, except that stations are required to relay them. [2] When a message is received, the receiver is to open an audio channel to the originating source until the End of Message (EOM) tones are received.