[GreenKeys] TYYs and the Emergency Broadcast System

[Paul Birkel]

https://hackaday.com/2017/11/16/radio-apocalypse-the-emergency-broadcast-sys
tem

 

"The EBS system did take cues from CONELRAD, though. The basic architecture
was the same - to create one nationwide network that the government could
use to transmit consistent messages and instructions quickly and
efficiently. Linking the national carriers into a single network was
initiated by a teletype message with codeword authentication to primary
stations like the Big Three networks and news services like UPI and AP. To
get the attention of station employees tasked with monitoring teletypes in
station newsrooms often full of the clattering devices, this Emergency
Action Notification (EAN) was preceded by a line of X characters and a bunch
of control-Gs to sound the teletype's bell."

 

Does that pre-EAN pattern sound right?  Anyone here with hands-on experience
servicing these sorts of messages?

 

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