pdf Pentagon PBX ~ 1942 Popular

Published on 25 January 2010 By Anonymous 1192 downloads

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Pentagon PBX ~ 1942.pdf

November 28, 1942, Telephony (special issue). "World's biggest PBX" serves 20,000 phones. Only 10 jacks per 100 lines. (Contributed by Steve Cichorsky.)

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Thanks for new documents from Bruce Patterson, Jon Kolger, Paul Ivester, Len Hicken, Paul Fassbender, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), the Connections Museum, Rick Walsh, Jeff Lamb, Jeremy Walters, Mark Cuccia, Alan David, Harry Joseph, Charlie Terry, Karl Brose, Dennis Hock, Tim Griffin, Remco Enthoven, and Steve Cichorsky.

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pdf Pentagon PBX ~ 1942 Popular

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