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 4159 - Jan22 Maintenance AE Dials Substations Popular

545 downloads

Download (pdf, 2.37 MB)

ATT_Spec_4159_Jan22_Maint_AE_Dials_at_Substations_tci.pdf

AT&T Spec 4159 - Jan22 Maintenance AE Dials Substations

16 pages. January 1922. Cleaned up scan of this classic specification, including parts inspection and dial speed adjustment. Contributed by Jeff Lamb. Bookmarked by Paul Fassbender.

pdf AT&T Spec 4448 Mar25 - Stations Apparatus for Deaf Subscribers Popular

1650 downloads

Download (pdf, 824 KB)

Spec4448_Mar25_-_Stations_Apparatus_for_Deaf_Subscribers_tci-ocr.pdf

AT&T Spec 4448 Mar25 - Stations Apparatus for Deaf Subscribers

Includes: Double Head Receiver Installations; Temporary Amplifier Installations w/ #27-A Amplifier; and Permanent Amplifier Installations w/ #23-A Amplifier and #6013-A Key. ATT. Contributed by Steve Cichorsky. Processed by Remco Enthoven and Paul Fassbender.

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

3006 downloads

Download (pdf, 5.42 MB)

ATT_Spec_3859_Aug22_Substation_Wiring_Plans_ocr_r.pdf

AT&T Spec 3859 Aug22 Substation Wiring Plans Ocr R

Contributed by Steve Cichorsky. 

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

3199 downloads

Download (pdf, 1.78 MB)

Spec3859_Aug22_Substation_Wiring_Plans.pdf

AT&T Spec 3859 - Aug22 - Station Wiring Plans
Specification 3859, August 1922.  Contributed by Steve Cichorsky.

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

2904 downloads

Download (pdf, 12.05 MB)

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 4621 - No. 530A Subscriber Set for Outdoor Use - June 1926 Popular

2118 downloads

Download (pdf, 2.34 MB)

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 4590 - No. 50 Coin Collector - Installation - April 1927 Popular

2306 downloads

Download (pdf, 2.59 MB)

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 4588 - May28 CB Manual Stations [LARGE FILE] Popular

2442 downloads

Download (pdf, 21.13 MB)

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 3855 - CP Insert Mar31 Adjustments Substation Apparatus Popular

2873 downloads

Download (pdf, 363 KB)

Spec3855_CP_Insert_Mar31_Adjustments_Substation_Apparatus.pdf

AT&T Spec 3855 - CP Insert Mar31 Adjustments Substation Apparatus
Contributed by Chuck Hensley.

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

3023 downloads

Download (pdf, 4.49 MB)

Spec3855_Mar17_Adjustments_Substation_Apparatus.pdf

AT&T Spec 3855 - Mar17 Adjustments Substation Apparatus
Contributed by Chuck Hensley.

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

2917 downloads

Download (pdf, 2.11 MB)

Spec3855_SuppB_Sep30_Adjustments_Substation_Apparatus.pdf

AT&T Spec 3855 - SuppB Sep30 Adjustments Substation Apparatus
Contributed by Chuck Hensley.

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

2727 downloads

Download (pdf, 627 KB)

Spec3855_SuppC_Mar31_Adjustments_Substation_Apparatus.pdf

AT&T Spec 3855 - SuppC Mar31 Adjustments Substation Apparatus
Contributed by Chuck Hensley.

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

2672 downloads

Download (pdf, 374 KB)

Spec3859_CP_Insert_Apr31_Station_Wiring_Plans.pdf

AT&T Spec 3859 - CP Insert Apr31 Station Wiring Plans
Contributed by Chuck Hensley.

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

3232 downloads

Download (pdf, 11.43 MB)

Spec3859_SuppB_Sep30_Station_Wiring_Plans.pdf

AT&T Spec 3859 - SuppB Sep30 Station Wiring Plans
Contributed by Chuck Hensley.

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

2565 downloads

Download (pdf, 342 KB)

Spec4159_CP_Insert_Dec24_Maintenance_Automatic_Electric_Dials_Substations.pdf

AT&T Spec 4159 - CP Insert Dec24 Maintenance Automatic Electric Dials Substations
Contributed by Chuck Hensley.

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

3310 downloads

Download (pdf, 4.61 MB)

Spec4159_Jan22_Maintenance_Automatic_Electric_Dials_Substations.pdf

AT&T Spec 4159 - Jan22 Maintenance Automatic Electric Dials Substations
Contributed by Chuck Hensley.

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

2736 downloads

Download (pdf, 675 KB)

Spec4159_SuppA_Jun24_Maintenance_Automatic_Electric_Dials_Substations.pdf

AT&T Spec 4159 - SuppA Jun24 Maintenance Automatic Electric Dials Substations
Contributed by Chuck Hensley.

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

3254 downloads

Download (pdf, 11.82 MB)

Spec4170_Apr22_Substation_Private_Branch_Exchange_Protector_Installation.pdf

AT&T Spec 4170 - Apr22 Substation Private Branch Exchange Protector Installation
Contributed by Chuck Hensley.

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

2705 downloads

Download (pdf, 2.55 MB)

Spec4170_SuppA_Dec24_Substation_Private_Branch_Exchange_Protector_Installation.pdf

AT&T Spec 4170 - SuppA Dec24 Substation Private Branch Exchange Protector Installation
Contributed by Chuck Hensley.

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

2865 downloads

Download (pdf, 1.42 MB)

Spec4566_CP_InsertOct31_Dial_Manual_CB_Stations.pdf

AT&T Spec 4566 - CP Insert Oct31 Dial Manual CB Stations
Contributed by Chuck Hensley.

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