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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 (3089 downloads) Popular Download (pdf, 363 KB)
pdf AT&T Spec 3855 - Mar17 Adjustments Substation Apparatus (3258 downloads) Popular Download (pdf, 4.49 MB)
pdf AT&T Spec 3855 - SuppB Sep30 Adjustments Substation Apparatus (3150 downloads) Popular Download (pdf, 2.11 MB)
pdf AT&T Spec 3855 - SuppC Mar31 Adjustments Substation Apparatus (2922 downloads) Popular Download (pdf, 627 KB)
pdf AT&T Spec 3859 - Aug22 - Station Wiring Plans (3437 downloads) Popular Download (pdf, 1.78 MB)
pdf AT&T Spec 3859 - CP Insert Apr31 Station Wiring Plans (2868 downloads) Popular Download (pdf, 374 KB)
pdf AT&T Spec 3859 - SuppB Sep30 Station Wiring Plans (3428 downloads) Popular Download (pdf, 11.43 MB)
pdf AT&T Spec 3859 Aug22 Substation Wiring Plans Ocr R (3209 downloads) Popular Download (pdf, 5.42 MB)
pdf AT&T Spec 4159 - CP Insert Dec24 Maintenance Automatic Electric Dials Substations (2771 downloads) Popular Download (pdf, 342 KB)
pdf AT&T Spec 4159 - Jan22 Maintenance AE Dials Substations (742 downloads) Popular Download (pdf, 2.37 MB)
pdf AT&T Spec 4159 - Jan22 Maintenance Automatic Electric Dials Substations (3520 downloads) Popular Download (pdf, 4.61 MB)
pdf AT&T Spec 4159 - SuppA Jun24 Maintenance Automatic Electric Dials Substations (2940 downloads) Popular Download (pdf, 675 KB)
pdf AT&T Spec 4170 - Apr22 Substation Private Branch Exchange Protector Installation (3437 downloads) Popular Download (pdf, 11.82 MB)
pdf AT&T Spec 4170 - SuppA Dec24 Substation Private Branch Exchange Protector Installation (2901 downloads) Popular Download (pdf, 2.55 MB)
pdf AT&T Spec 4430 - Open Type Booths Tl (2712 downloads) Popular Download (pdf, 794 KB)
pdf AT&T Spec 4448 Mar25 - Stations Apparatus for Deaf Subscribers (1868 downloads) Popular Download (pdf, 824 KB)
pdf AT&T Spec 4455 - Public Telephone Signs Tl (3086 downloads) Popular Download (pdf, 1.05 MB)
pdf AT&T Spec 4465 7-J And 7-K Coin Collectors (2683 downloads) Popular Download (pdf, 815 KB)
pdf AT&T Spec 4566 - CP Insert Oct31 Dial Manual CB Stations (3077 downloads) Popular Download (pdf, 1.42 MB)
pdf AT&T Spec 4566 - SuppB Jun30 Dial Manual CB Stations (3061 downloads) Popular Download (pdf, 1.48 MB)

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Thanks for new documents from Shane Young, David Brown, the Connections Museum, Paul Fassbender, Lou Maffei, Rick Thoensen. Sheila Flory, Tom Hesson, Jim Hurtle, Ed Palazzo, Bruce Patterson, Remco Enthoven, Jon Kolger, Paul Ivester, Len Hicken, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), Rick Walsh, and Jeff Lamb.

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