AT&T Long Lines: The Wireless Network Before the Internet

This video describes the history of the AT&T Long Lines system from a present-day perspective, mainly focusing on the TD-2 microwave radio relay network.

My follow-up Long Lines videos:
Waveguides and Antennas:    • AT&T Long Lines: The Waveguides and Antennas  
Power Plants, Batteries, and Generators:    • AT&T Long Lines: The Power Plants, Batteri...  

All content used in this video is in the public domain or qualifies as fair use for educational purposes.

Sources and further reading:
https://en.wikipedia.org/wiki/TD-2
https://www.wired.com/2015/03/spencer...
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   • Long Lines Microwave Video Sources  
https://long-lines.net/index.html
https://long-lines.com/
https://www.telecomarchive.com/
https://en.wikipedia.org/wiki/History...
https://en.wikipedia.org/wiki/Vacuum_...

Additional royalty-free stock images obtained from:
https://pixabay.com/collections/long-...

Video Chapters:
0:00 Introduction
1:11 Beginnings of Telecommunication
1:40 Early Radio Communications (HF)
2:26 Wires
3:00 Television and Coaxial Cables
3:47 The Microwave Era Begins (1945)
5:12 TD-2 (1947)
5:42 Cold War Bunkers
6:16 Technical Improvements (1950s-1980s)
9:05 Demise (1970s-1990s)
9:43 Today