AT&T Specifications (pre-BSP) (by Doc #)

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4-digit all numeric codes, used before about 1930.

Documents

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AT&T Spec 3859 Aug22 Substation Wiring Plans Ocr R AT&T Spec 3859 Aug22 Substation Wiring Plans Ocr R

Date added: 03/16/2013
Date modified: 04/25/2013
Filesize: 5.42 MB
Downloads: 2060

Contributed by Steve Cichorsky. 

AT&T Spec 3859 - Aug22 - Station Wiring Plans AT&T Spec 3859 - Aug22 - Station Wiring Plans

Date added: 05/10/2012
Date modified: 05/10/2012
Filesize: 1.78 MB
Downloads: 2388
Specification 3859, August 1922.  Contributed by Steve Cichorsky.

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

Date added: 01/22/2012
Date modified: 04/25/2013
Filesize: 12.05 MB
Downloads: 3475
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.

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

Date added: 12/18/2011
Date modified: 01/09/2012
Filesize: 2.34 MB
Downloads: 2118
Rescanned for clarity. Includes wiring diagram.  Contributed by Steve Cichorsky.

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

Date added: 12/18/2011
Date modified: 01/09/2012
Filesize: 2.59 MB
Downloads: 2420
Rescanned for clarity.  Replaced Spec 3857 and part of 4160.  Contributed by Steve Cichorsky.

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

Date added: 11/19/2011
Date modified: 01/09/2012
Filesize: 21.13 MB
Downloads: 2187
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.

AT&T Spec 3855 - CP Insert Mar31 Adjustments Substation Apparatus AT&T Spec 3855 - CP Insert Mar31 Adjustments Substation Apparatus

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 363.79 kB
Downloads: 1505
Contributed by Chuck Hensley.

AT&T Spec 3855 - Mar17 Adjustments Substation Apparatus AT&T Spec 3855 - Mar17 Adjustments Substation Apparatus

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 4.49 MB
Downloads: 1944
Contributed by Chuck Hensley.

AT&T Spec 3855 - SuppB Sep30 Adjustments Substation Apparatus AT&T Spec 3855 - SuppB Sep30 Adjustments Substation Apparatus

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 2.11 MB
Downloads: 1879
Contributed by Chuck Hensley.

AT&T Spec 3855 - SuppC Mar31 Adjustments Substation Apparatus AT&T Spec 3855 - SuppC Mar31 Adjustments Substation Apparatus

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 627.33 kB
Downloads: 1769
Contributed by Chuck Hensley.

AT&T Spec 3859 - CP Insert Apr31 Station Wiring Plans AT&T Spec 3859 - CP Insert Apr31 Station Wiring Plans

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 374.61 kB
Downloads: 1630
Contributed by Chuck Hensley.

AT&T Spec 3859 - SuppB Sep30 Station Wiring Plans AT&T Spec 3859 - SuppB Sep30 Station Wiring Plans

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 11.43 MB
Downloads: 2134
Contributed by Chuck Hensley.

AT&T Spec 4159 - CP Insert Dec24 Maintenance Automatic Electric Dials Substations AT&T Spec 4159 - CP Insert Dec24 Maintenance Automatic Electric Dials Substations

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 342.01 kB
Downloads: 1622
Contributed by Chuck Hensley.

AT&T Spec 4159 - Jan22 Maintenance Automatic Electric Dials Substations AT&T Spec 4159 - Jan22 Maintenance Automatic Electric Dials Substations

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 4.61 MB
Downloads: 2650
Contributed by Chuck Hensley.

AT&T Spec 4159 - SuppA Jun24 Maintenance Automatic Electric Dials Substations AT&T Spec 4159 - SuppA Jun24 Maintenance Automatic Electric Dials Substations

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 675.59 kB
Downloads: 1800
Contributed by Chuck Hensley.

AT&T Spec 4170 - Apr22 Substation Private Branch Exchange Protector Installation AT&T Spec 4170 - Apr22 Substation Private Branch Exchange Protector Installation

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 11.82 MB
Downloads: 2126
Contributed by Chuck Hensley.

AT&T Spec 4170 - SuppA Dec24 Substation Private Branch Exchange Protector Installation AT&T Spec 4170 - SuppA Dec24 Substation Private Branch Exchange Protector Installation

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 2.55 MB
Downloads: 1863
Contributed by Chuck Hensley.

AT&T Spec 4566 - CP Insert Oct31 Dial Manual CB Stations AT&T Spec 4566 - CP Insert Oct31 Dial Manual CB Stations

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 1.42 MB
Downloads: 2024
Contributed by Chuck Hensley.

AT&T Spec 4566 - SuppB Jun30 Dial Manual CB Stations AT&T Spec 4566 - SuppB Jun30 Dial Manual CB Stations

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 1.48 MB
Downloads: 1899
Contributed by Chuck Hensley.

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

Date added: 11/11/2011
Date modified: 01/09/2012
Filesize: 2.28 MB
Downloads: 2132
Contributed by Chuck Hensley.

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Thanks for new documents from David Gruger, Jeff Lamb, Walt Aydelotte, Dennis Hock, Steve Flocke, Paul Wills, Sam Etler, Fred Haynes, John Novack, Clint Gilliland, Steve Cichorsky and Karl Brose.

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