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56:22
YouTube
themaritimegirl
Western Electric 1A2 key telephone system, with Seriss Corporation 1A2 KSU
A look at an early key telephone system, and the modern homebrew key service unit that drives this one. Relevant links: http://seriss.com/1a2-ksu/ http://seriss.com/people/erco/1a2/ Greg Ercolano's YouTube channel, where he's posted a few videos of the 1A2 KSU and how it has evolved over time: https://www.youtube.com/channel ...
4.3K views
Mar 26, 2021
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