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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 (2782 downloads) Popular Download (pdf, 363 KB)
pdf AT&T Spec 3855 - Mar17 Adjustments Substation Apparatus (2929 downloads) Popular Download (pdf, 4.49 MB)
pdf AT&T Spec 3855 - SuppB Sep30 Adjustments Substation Apparatus (2813 downloads) Popular Download (pdf, 2.11 MB)
pdf AT&T Spec 3855 - SuppC Mar31 Adjustments Substation Apparatus (2648 downloads) Popular Download (pdf, 627 KB)
pdf AT&T Spec 3859 - Aug22 - Station Wiring Plans (3081 downloads) Popular Download (pdf, 1.78 MB)
pdf AT&T Spec 3859 - CP Insert Apr31 Station Wiring Plans (2573 downloads) Popular Download (pdf, 374 KB)
pdf AT&T Spec 3859 - SuppB Sep30 Station Wiring Plans (3133 downloads) Popular Download (pdf, 11.43 MB)
pdf AT&T Spec 3859 Aug22 Substation Wiring Plans Ocr R (2919 downloads) Popular Download (pdf, 5.42 MB)
pdf AT&T Spec 4159 - CP Insert Dec24 Maintenance Automatic Electric Dials Substations (2487 downloads) Popular Download (pdf, 342 KB)
pdf AT&T Spec 4159 - Jan22 Maintenance AE Dials Substations (464 downloads) Popular Download (pdf, 2.37 MB)
pdf AT&T Spec 4159 - Jan22 Maintenance Automatic Electric Dials Substations (3231 downloads) Popular Download (pdf, 4.61 MB)
pdf AT&T Spec 4159 - SuppA Jun24 Maintenance Automatic Electric Dials Substations (2662 downloads) Popular Download (pdf, 675 KB)
pdf AT&T Spec 4170 - Apr22 Substation Private Branch Exchange Protector Installation (3176 downloads) Popular Download (pdf, 11.82 MB)
pdf AT&T Spec 4170 - SuppA Dec24 Substation Private Branch Exchange Protector Installation (2640 downloads) Popular Download (pdf, 2.55 MB)
pdf AT&T Spec 4430 - Open Type Booths Tl (2410 downloads) Popular Download (pdf, 794 KB)
pdf AT&T Spec 4448 Mar25 - Stations Apparatus for Deaf Subscribers (1551 downloads) Popular Download (pdf, 824 KB)
pdf AT&T Spec 4455 - Public Telephone Signs Tl (2773 downloads) Popular Download (pdf, 1.05 MB)
pdf AT&T Spec 4465 7-J And 7-K Coin Collectors (2400 downloads) Popular Download (pdf, 815 KB)
pdf AT&T Spec 4566 - CP Insert Oct31 Dial Manual CB Stations (2776 downloads) Popular Download (pdf, 1.42 MB)
pdf AT&T Spec 4566 - SuppB Jun30 Dial Manual CB Stations (2798 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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