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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

pdf AT&T Spec 4566 - SuppC Nov30 Dial Manual CB Stations Popular

By 2693 downloads

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Spec4566_SuppC_Nov30_Dial_Manual_CB_Stations.pdf

AT&T Spec 4566 - SuppC Nov30 Dial Manual CB Stations
Contributed by Chuck Hensley.

pdf AT&T Spec 4566 - SuppD Dec30 Dial Manual CB Stations Popular

By 1911 downloads

Download (pdf, 3.93 MB)

Spec4566_SuppD_Dec30_Dial_Manual_CB_Stations.pdf

AT&T Spec 4566 - SuppD Dec30 Dial Manual CB Stations
Contributed by Chuck Hensley.

pdf AT&T Spec 4566 Feb26 Machine Switching Stations T Ocr R Popular

By 2903 downloads

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Spec4566_Feb26_Machine_Switching_Stations T ocr r.pdf

AT&T Spec 4566 Feb26 Machine Switching Stations T Ocr R
116 pages. Replaced spec 4160. Covers 51AL, 51CM, 51C, 51CN, desk stands, D-75959 test set, 7A-type coin collector, subsets - 392-type, 534-type, 553-type and 554-type - plus wiring diagrams. Contributed by Chuck Hensley.

[Original Archived]  OCR / Size reduction by Clint Gilliland.

pdf AT&T Spec 4588 - May28 CB Manual Stations [LARGE FILE] Popular

By 2441 downloads

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Spec4588_May28_CB_Manual_Stations.pdf

AT&T Spec 4588 - May28 CB Manual Stations [LARGE FILE]
Replaced parts of specs 3851 and 3854. Covers 40AL, 40CM, 51AL, 51CM, 51CN, 52AB desk sets, 7J-type coin collector, subsets - 392-type, 533-type, 534-type, 553-type and 554-type - plus wiring diagrams. Contributed by Chuck Hensley.

pdf AT&T Spec 4590 - No. 50 Coin Collector - Installation - April 1927 Popular

By 2305 downloads

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Spec4590_Apr27_No50CoinCollectorInst_PageThumbnails2.pdf

AT&T Spec 4590 - No. 50 Coin Collector - Installation - April 1927
Rescanned for clarity.  Replaced Spec 3857 and part of 4160.  Contributed by Steve Cichorsky.

pdf AT&T Spec 4621 - No. 530A Subscriber Set for Outdoor Use - June 1926 Popular

By 2117 downloads

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Spec4621_Jun26_530A_OutdoorSubset_s2.pdf

AT&T Spec 4621 - No. 530A Subscriber Set for Outdoor Use - June 1926
Rescanned for clarity. Includes wiring diagram.  Contributed by Steve Cichorsky.

pdf AT&T Spec 4800 - Telephone Directory Install Tl Popular

By 1864 downloads

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ATTSpec4800TelDirInstall_tl.pdf

AT&T Spec 4800 - Telephone Directory Install Tl

pdf AT&T Spec 4810, Dec 1927 - Stations Hand Telephone Sets Popular

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Spec_4810_Dec27_Station_Hand_Tel_Sets_ABC_Mountings_tci_ocr.pdf

AT&T Spec 4810, Dec 1927 - Stations Hand Telephone Sets

A.T.&T. Specifications 4810, December 1927, Replacing Spec 4732 and Supplement A, 36 pages.
Includes Cording, Connections and Tests for E1A and E1B handserts used on A, B and C handset mountings, including A1-type, A2-type, A3-type, B1-type, B2-type, B3-type and C1-type mountings. (Mounting codes: A1, A2, A3, B1 and B2). OCR and bookmarks by Paul Fassbender.

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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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