by Ciro Santilli (@cirosantilli, 34)
Very interesting story! A predecessor to microwave transmission for trading.
Video 1.
How The First Ever Telecoms Scam Worked by Tom Scott (2018)
Source. Amazing how they used control signals to hide the information from officials on either side.
Video 1.
What happened to America’s Telegraph lines? by IT'S HISTORY
. Source.

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  1. Telecommunication system
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