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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 3855 - CP Insert Mar31 Adjustments Substation Apparatus (2700 downloads) Popular Download (pdf, 363 KB)
pdf AT&T Spec 3855 - Mar17 Adjustments Substation Apparatus (2855 downloads) Popular Download (pdf, 4.49 MB)
pdf AT&T Spec 3855 - SuppB Sep30 Adjustments Substation Apparatus (2741 downloads) Popular Download (pdf, 2.11 MB)
pdf AT&T Spec 3855 - SuppC Mar31 Adjustments Substation Apparatus (2573 downloads) Popular Download (pdf, 627 KB)
pdf AT&T Spec 3859 - Aug22 - Station Wiring Plans (2996 downloads) Popular Download (pdf, 1.78 MB)
pdf AT&T Spec 3859 - CP Insert Apr31 Station Wiring Plans (2490 downloads) Popular Download (pdf, 374 KB)
pdf AT&T Spec 3859 - SuppB Sep30 Station Wiring Plans (3043 downloads) Popular Download (pdf, 11.43 MB)
pdf AT&T Spec 3859 Aug22 Substation Wiring Plans Ocr R (2830 downloads) Popular Download (pdf, 5.42 MB)
pdf AT&T Spec 4159 - CP Insert Dec24 Maintenance Automatic Electric Dials Substations (2411 downloads) Popular Download (pdf, 342 KB)
pdf AT&T Spec 4159 - Jan22 Maintenance AE Dials Substations (390 downloads) Popular Download (pdf, 2.37 MB)
pdf AT&T Spec 4159 - Jan22 Maintenance Automatic Electric Dials Substations (3152 downloads) Popular Download (pdf, 4.61 MB)
pdf AT&T Spec 4159 - SuppA Jun24 Maintenance Automatic Electric Dials Substations (2582 downloads) Popular Download (pdf, 675 KB)
pdf AT&T Spec 4170 - Apr22 Substation Private Branch Exchange Protector Installation (3103 downloads) Popular Download (pdf, 11.82 MB)
pdf AT&T Spec 4170 - SuppA Dec24 Substation Private Branch Exchange Protector Installation (2563 downloads) Popular Download (pdf, 2.55 MB)
pdf AT&T Spec 4430 - Open Type Booths Tl (2333 downloads) Popular Download (pdf, 794 KB)
pdf AT&T Spec 4448 Mar25 - Stations Apparatus for Deaf Subscribers (1468 downloads) Popular Download (pdf, 824 KB)
pdf AT&T Spec 4455 - Public Telephone Signs Tl (2694 downloads) Popular Download (pdf, 1.05 MB)
pdf AT&T Spec 4465 7-J And 7-K Coin Collectors (2328 downloads) Popular Download (pdf, 815 KB)
pdf AT&T Spec 4566 - CP Insert Oct31 Dial Manual CB Stations (2699 downloads) Popular Download (pdf, 1.42 MB)
pdf AT&T Spec 4566 - SuppB Jun30 Dial Manual CB Stations (2723 downloads) Popular Download (pdf, 1.48 MB)

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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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