The Siren Board

Discussion of Outdoor Warning Systems
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PostPosted: Mon Aug 08, 2022 10:48 pm 
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Real Name: Andy M
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Location: Sarnia, Ontario
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This was taken from a Sunoco instructional training video from 1996, showing Sarnia's former system of dual tone Alertronics performing a "long pulse" signal similar to what the ATIs do nowadays.

https://www.youtube.com/watch?v=2V2afg8DEao

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