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

CLICK HERE FOR THE LIST VIEW.

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

Documents

Select Toggle Title Date Download
pdf AT&T Spec 4159 - Jan22 Maintenance AE Dials Substations (345 downloads) Popular Download (pdf, 2.37 MB)
pdf AT&T Spec 4448 Mar25 - Stations Apparatus for Deaf Subscribers (1432 downloads) Popular Download (pdf, 824 KB)
pdf AT&T Spec 3859 Aug22 Substation Wiring Plans Ocr R (2777 downloads) Popular Download (pdf, 5.42 MB)
pdf AT&T Spec 3859 - Aug22 - Station Wiring Plans (2940 downloads) Popular Download (pdf, 1.78 MB)
pdf AT&T Spec 4566 Feb26 Machine Switching Stations T Ocr R (2729 downloads) Popular Download (pdf, 12.05 MB)
pdf AT&T Spec 4621 - No. 530A Subscriber Set for Outdoor Use - June 1926 (1972 downloads) Popular Download (pdf, 2.34 MB)
pdf AT&T Spec 4590 - No. 50 Coin Collector - Installation - April 1927 (2120 downloads) Popular Download (pdf, 2.59 MB)
pdf AT&T Spec 4588 - May28 CB Manual Stations [LARGE FILE] (2309 downloads) Popular Download (pdf, 21.13 MB)
pdf AT&T Spec 3855 - CP Insert Mar31 Adjustments Substation Apparatus (2649 downloads) Popular Download (pdf, 363 KB)
pdf AT&T Spec 3855 - Mar17 Adjustments Substation Apparatus (2805 downloads) Popular Download (pdf, 4.49 MB)
pdf AT&T Spec 3855 - SuppB Sep30 Adjustments Substation Apparatus (2685 downloads) Popular Download (pdf, 2.11 MB)
pdf AT&T Spec 3855 - SuppC Mar31 Adjustments Substation Apparatus (2516 downloads) Popular Download (pdf, 627 KB)
pdf AT&T Spec 3859 - CP Insert Apr31 Station Wiring Plans (2440 downloads) Popular Download (pdf, 374 KB)
pdf AT&T Spec 3859 - SuppB Sep30 Station Wiring Plans (2984 downloads) Popular Download (pdf, 11.43 MB)
pdf AT&T Spec 4159 - CP Insert Dec24 Maintenance Automatic Electric Dials Substations (2361 downloads) Popular Download (pdf, 342 KB)
pdf AT&T Spec 4159 - Jan22 Maintenance Automatic Electric Dials Substations (3105 downloads) Popular Download (pdf, 4.61 MB)
pdf AT&T Spec 4159 - SuppA Jun24 Maintenance Automatic Electric Dials Substations (2525 downloads) Popular Download (pdf, 675 KB)
pdf AT&T Spec 4170 - Apr22 Substation Private Branch Exchange Protector Installation (3060 downloads) Popular Download (pdf, 11.82 MB)
pdf AT&T Spec 4170 - SuppA Dec24 Substation Private Branch Exchange Protector Installation (2520 downloads) Popular Download (pdf, 2.55 MB)
pdf AT&T Spec 4566 - CP Insert Oct31 Dial Manual CB Stations (2651 downloads) Popular Download (pdf, 1.42 MB)

New User?

Read the articles under "Introduction" in the black menu bar above.

Recent Contributors

Thanks for new documents from 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.

Please send a file to add your name to this list!

30 Latest Additions

Who's online

We have 243 guests online

Hints for using the TCI Library

"Menu Bar" for site navigation.
Many menu choices are hidden until you mouse over words in the black Menu Bar (above).  If you want help getting started, see the links under the word "Introduction" in the Menu Bar.
 
The user interface is oriented toward the user’s choice to either Browse or Search for information.  The Browse the Library menu entry offers many quick links to move around the Library quickly.  Try it!

Three search options.
The Library’s keyword-based searches, called Basic Search and Advanced Search, accept keywords as short as 2 characters (WE, AE, etc.) and search strings up to 255 characters.  If you get more than 1,000 items, refine your search or try the Google Search option.
 
When selected from the Menu Bar, Google only searches for files in the TCI Library.
 
Library INBOX.
The INBOX may hold some files that have been submitted but not fully processed into the Library.  These are often topics of current discussion on the TCI Email Group. Items in the INBOX are not found using Basic or advanced searches, but ARE found by a Google Search.
 
Remember to check the INBOX if you don't find something with the other searches.
 
Finding BSPs.
Many BSPs are currently only identified by BSP number. If a text search doesn’t produce a BSP, try looking in one of the many BSP index documents to find a BSP number for the product you are researching just as you would do if referencing a paper library of the BSPs. Then enter the BSP number in the search box.
 
Finding CDs and SDs.
Some related CDs and SDs are filed in different areas. Try searching for just the numeric portion of the name.  Remember to check the INBOX if you don't find something with the Basic or Advanced searches -- or use the Google search.
 
Compact Category Listing.
When browsing, to change the category listing view from normal to compact, click on Browse the Library in the black menu bar.
 
To change from compact to normal view, click on Document Repository in the drop down under Browse the Library.