Folder Bell Telephone Quarterly / Bell Telephone Magazine

Renamed from BTQ to BTM in 1941.

Documents

Select Toggle Title Date Download
pdf 74sep BTM p10 - PhoneCenter Concept Grows (236 downloads) Popular Download (pdf, 2.42 MB)
pdf 67 BTM jul p18 - Dreyfuss - Adapting Products to People (448 downloads) Popular Download (pdf, 3.53 MB)
pdf 57Summer BTM P20 Developing Consumer Products (550 downloads) Popular Download (pdf, 623 KB)
pdf 59Winter BTM P6 Area Codes And ANC (722 downloads) Popular Download (pdf, 1.70 MB)
pdf 60Winter BTM P32 Field Trial Telephones (697 downloads) Popular Download (pdf, 245 KB)
pdf 62Winter BTM P10 101 ESS (612 downloads) Popular Download (pdf, 2.26 MB)
pdf 61Winter BTM P65 Magnetic Drum Telephone (580 downloads) Popular Download (pdf, 234 KB)
pdf 62Autumn BTM P10 All Number Calling (606 downloads) Popular Download (pdf, 1.22 MB)
pdf 62Spring BTM P17 Automatic Dialers (571 downloads) Popular Download (pdf, 902 KB)
pdf 65Autumn BTM P8 Trimline Intro (567 downloads) Popular Download (pdf, 1.44 MB)
pdf 65Summer BTM P54 Picturephone Business Experiments (545 downloads) Popular Download (pdf, 2.71 MB)
pdf 55Summer BTM P129 Designing the Telephone (500-series) (587 downloads) Popular Download (pdf, 1.20 MB)
pdf 61Spring BTM P32 Farm Interphone (1070 downloads) Popular Download (pdf, 686 KB)
pdf 61Summer BTM P10 Centrex (762 downloads) Popular Download (pdf, 1.06 MB)
pdf 63Autumn BTM P30 Touch Tone Service is Here (815 downloads) Popular Download (pdf, 943 KB)
pdf 64Spring BTM P14 Developing Picturephone Service (419 downloads) Popular Download (pdf, 1.38 MB)
pdf 54Spring BTM P51 Answering Set Photos (656 downloads) Popular Download (pdf, 175 KB)
pdf 55Winter BTM P232 Standardized Telephone Numbers (704 downloads) Popular Download (pdf, 1.58 MB)
pdf 47Autum BTM P127 Plastics In Telephone Plant (730 downloads) Popular Download (pdf, 6.81 MB)
pdf 48Spring BTM P9 Public Telephones (744 downloads) Popular Download (pdf, 1.80 MB)

New User?

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

Recent Contributors

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.

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

30 Latest Additions

Who's online

We have 850 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.