A technician doing maintenance work on the electromechanical telephone switches in the telephone exchange building at East 30th St., New York City, 1938.
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View Reddit by waleeds23 – View Source
A technician doing maintenance work on the electromechanical telephone switches in the telephone exchange building at East 30th St., New York City, 1938.
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View Reddit by waleeds23 – View Source
He would be working on the Western Electric #1 Crossbar Switch. It was capable of switching 100s of 1000s of local phone calls/hour all without any CPUs or software.
The switch which would become it’s successor, #5 Crossbar, was touted as the most complex relay logic machine ever built. There was once 10s of 1000s of them all over the USA.
Eventually they were all replaced by electronic switches which are now being replaced by packet switches.
So was fixing this mostly synonymous with changing out a blinker relay in a car?
OSHA violation, working aloft w/out a hard hat. /s