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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 (2868 downloads) Popular Download (pdf, 363 KB)
pdf AT&T Spec 3855 - Mar17 Adjustments Substation Apparatus (3022 downloads) Popular Download (pdf, 4.49 MB)
pdf AT&T Spec 3855 - SuppB Sep30 Adjustments Substation Apparatus (2915 downloads) Popular Download (pdf, 2.11 MB)
pdf AT&T Spec 3855 - SuppC Mar31 Adjustments Substation Apparatus (2724 downloads) Popular Download (pdf, 627 KB)
pdf AT&T Spec 3859 - Aug22 - Station Wiring Plans (3193 downloads) Popular Download (pdf, 1.78 MB)
pdf AT&T Spec 3859 - CP Insert Apr31 Station Wiring Plans (2667 downloads) Popular Download (pdf, 374 KB)
pdf AT&T Spec 3859 - SuppB Sep30 Station Wiring Plans (3229 downloads) Popular Download (pdf, 11.43 MB)
pdf AT&T Spec 3859 Aug22 Substation Wiring Plans Ocr R (3003 downloads) Popular Download (pdf, 5.42 MB)
pdf AT&T Spec 4159 - CP Insert Dec24 Maintenance Automatic Electric Dials Substations (2561 downloads) Popular Download (pdf, 342 KB)
pdf AT&T Spec 4159 - Jan22 Maintenance AE Dials Substations (543 downloads) Popular Download (pdf, 2.37 MB)
pdf AT&T Spec 4159 - Jan22 Maintenance Automatic Electric Dials Substations (3304 downloads) Popular Download (pdf, 4.61 MB)
pdf AT&T Spec 4159 - SuppA Jun24 Maintenance Automatic Electric Dials Substations (2733 downloads) Popular Download (pdf, 675 KB)
pdf AT&T Spec 4170 - Apr22 Substation Private Branch Exchange Protector Installation (3251 downloads) Popular Download (pdf, 11.82 MB)
pdf AT&T Spec 4170 - SuppA Dec24 Substation Private Branch Exchange Protector Installation (2701 downloads) Popular Download (pdf, 2.55 MB)
pdf AT&T Spec 4430 - Open Type Booths Tl (2495 downloads) Popular Download (pdf, 794 KB)
pdf AT&T Spec 4448 Mar25 - Stations Apparatus for Deaf Subscribers (1647 downloads) Popular Download (pdf, 824 KB)
pdf AT&T Spec 4455 - Public Telephone Signs Tl (2854 downloads) Popular Download (pdf, 1.05 MB)
pdf AT&T Spec 4465 7-J And 7-K Coin Collectors (2486 downloads) Popular Download (pdf, 815 KB)
pdf AT&T Spec 4566 - CP Insert Oct31 Dial Manual CB Stations (2863 downloads) Popular Download (pdf, 1.42 MB)
pdf AT&T Spec 4566 - SuppB Jun30 Dial Manual CB Stations (2871 downloads) Popular Download (pdf, 1.48 MB)

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Thanks for new documents from Ed Palazzo, 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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