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Folder AT&T Specifications (pre-BSP) (by Doc #)

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4-digit all numeric codes, used before about 1930.

Documents

Toggle Title Date Download
pdf AT&T Spec 4566 - SuppC Nov30 Dial Manual CB Stations (2706 downloads) Popular Download (pdf, 2.28 MB)
pdf AT&T Spec 4566 - SuppD Dec30 Dial Manual CB Stations (1925 downloads) Popular Download (pdf, 3.93 MB)
pdf AT&T Spec 4566 Feb26 Machine Switching Stations T Ocr R (2913 downloads) Popular Download (pdf, 12.05 MB)
pdf AT&T Spec 4588 - May28 CB Manual Stations [LARGE FILE] (2451 downloads) Popular Download (pdf, 21.13 MB)
pdf AT&T Spec 4590 - No. 50 Coin Collector - Installation - April 1927 (2316 downloads) Popular Download (pdf, 2.59 MB)
pdf AT&T Spec 4621 - No. 530A Subscriber Set for Outdoor Use - June 1926 (2128 downloads) Popular Download (pdf, 2.34 MB)
pdf AT&T Spec 4800 - Telephone Directory Install Tl (1875 downloads) Popular Download (pdf, 830 KB)
pdf AT&T Spec 4810, Dec 1927 - Stations Hand Telephone Sets (2801 downloads) Popular Download (pdf, 1.72 MB)

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Thanks for new documents from Jim Hurtle, Ed Palazzo, Paul Fassbender, Bruce Patterson, Remco Enthoven, Jon Kolger, Paul Ivester, Len Hicken, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), the Connections Museum, Rick Walsh, Jeff Lamb, Jeremy Walters, Alan David, Dennis Hock, and Tim Griffin.

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