Section of a CB1 manual telephone exchange switchboard with positions for three operators, unknown maker, British, 1925-1960. In use at Enfield Telephone Exchange 22 July 1925 to 5 October 1960 ...
Time is soon beeing called on telephone exchanges (aka Central Offices) all over the world, but these oddities are an important piece of the data center industry's history. Built to serve the original ...
AT an ordinary or manual telephone exchange, as is generally known, the subscribers' lines terminate on “jacks,” and are put through to each other by means of “plugs” and flexible conductors. The ...
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