Folder BLR

See Chuck Hensley's comprehensive index to articles in the BLR in the folder below.  It can be used to locate articles to research, whether found in the TCI LIbrary or elsewhere.

Chuck has offered to scan a limited number of pages from his collection (at his convenience).  Send requests using the "Contact Us" link in the Menu Bar above.

HINT:  Search for "BLR" followed by a topic keyword to find a series of related articles.  Use alphabetic sort to display them in chronological order.  e.g.  BLR PBX  or  BLR Picturephone.

When posted, complete scanned BLR issues from Sept. 1925 - Dec. 1961 were available here:
  https://worldradiohistory.com/Bell_Laboratories_Record_Issue_Key.htm

Categories

Documents

pdf 76Mar BLR P61 Centalized Attendant Service Popular

By 1164 downloads

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76Mar_BLR_P61_Centalized_Attendant_Service.pdf

76Mar BLR P61 Centalized Attendant Service

Bell Labs Record. Contributed by Chuck Hensley.

pdf 76May BLR P115 Telephone After 50 Popular

By 1596 downloads

Download (pdf, 2.51 MB)

76May_BLR_P115_Telephone_After_50.pdf

76May BLR P115 Telephone After 50

Bell Labs Record. Contributed by Chuck Hensley.

pdf 76Nov BLR P274 DIMENSION Custom Service Popular

By 1022 downloads

Download (pdf, 1.78 MB)

76Nov_BLR_P274_DIMENSION_Custom_Service.pdf

76Nov BLR P274 DIMENSION Custom Service

Bell Labs Record. Contributed by Chuck Hensley.

pdf 77Mar BLR P79 - Com Key - 718 1434 and 2152 KTS Popular

By 2211 downloads

Download (pdf, 1.80 MB)

77Mar_BLR_P79_COMKEY_718_1434_2152.pdf

77Mar BLR P79 - Com Key - 718 1434 and 2152 KTS

ComKey. Bell Labs Record. Contributed by Chuck Hensley.

pdf 77Nov BLR P271 HORIZON PBX Popular

By 1952 downloads

Download (pdf, 1.19 MB)

77Nov_BLR_P271_HORIZON_PBX.pdf

77Nov BLR P271 HORIZON PBX

Bell Labs Record. Contributed by Chuck Hensley.

pdf 77Nov BLR P276 HORIZON PBX Design Development Popular

By 2640 downloads

Download (pdf, 1.33 MB)

77Nov_BLR_P276_HORIZON_PBX_Design_Development.pdf

77Nov BLR P276 HORIZON PBX Design Development

Bell Labs Record. Contributed by Chuck Hensley.

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.

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