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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

Folder BLR Collections

Folder BLR Index

Documents

pdf 74dec BLR P361 - DUE - Detection of Unauthorized Equipment - BLR Popular

By 1032 downloads

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74dec_BLR_P361_DUE_Detection_Of_Unauthorized_Equip.pdf

74dec BLR P361 - DUE - Detection of Unauthorized Equipment - BLR

December 1974 Bell Labs Record. "Unauthorized Phones Get Their Due"

pdf 74Jun BLR P181 Vinyl Drop Wire Popular

By 633 downloads

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74Jun_BLR_P181_Vinyl_Drop_Wire.pdf

74Jun BLR P181 Vinyl Drop Wire

Bell Labs Record. Contributed by Chuck Hensley.

pdf 74May BLR P153 50A Attendant Console Popular

By 1184 downloads

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74May_BLR_P153_50A_Attendant_Console.pdf

74May BLR P153 50A Attendant Console

Bell Labs Record. Contributed by Chuck Hensley.

pdf 74nov BLR - p302 812A PBX Popular

By 1333 downloads

Download (pdf, 9.28 MB)

812A PBX (complete).pdf

74nov BLR - p302 812A PBX

November 1974 Bell Labs Record. Not OCRed.

pdf 74Nov BLR P302 812A PBX - ocr Popular

By 1167 downloads

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74Nov_BLR_P303_812A_PBX.pdf

74Nov BLR P302 812A PBX - ocr

Bell Labs Record. OCRed and size-reduced. Contributed by Chuck Hensley.

pdf 74Nov BLR P318 - Seeking the Ideal in "Hands-Free" Telephony for Speakerphones Popular

By 640 downloads

Download (pdf, 2.08 MB)

74Nov_BLR_P318_Seeking_Ideal_HandsFree_Telephony.pdf

74Nov BLR P318 - Seeking the Ideal in "Hands-Free" Telephony for Speakerphones

Bell Labs Record. Keywords: Hands free, Center clipping. Contributed by Chuck Hensley.

pdf 74sep BLR P238 - Modular Set Introduction Popular

By 1257 downloads

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74sep_BLR_P238_Modular_Set_Intro_r_tci_ocr.pdf

74sep BLR P238 - Modular Set Introduction

8MB.  Bell Labs Record, Sep 74, Pages 238-244 plus covers in color. Formatted for viewing (2 pages per pdf page). "Telephone Sets Go Mod (Modular, That Is)"  Modular Wiring. Contributed by Steve Cichorsky.

pdf 74Sep BLR P239 Telephones Go Modular Popular

By 683 downloads

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74sep_BLR_P239_Telephones_Go_Modular_tci_ocr.pdf

74Sep BLR P239 Telephones Go Modular

Bell Labs Record,  Sept. 1974. "Telephone Sets Go Mod (Modular, That Is)" Modular Wiring. Formatted for printing (individual pages). Modular wiring was phased in beginning in 1972, an important element in the new PhoneCenter stores. Contributed by Chuck Hensley.

pdf 74Sep BLR P253 Key Telephone Modular Panels Popular

By 917 downloads

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74Sep_BLR_P253_Key_Telephone_Modular_Panels.pdf

74Sep BLR P253 Key Telephone Modular Panels

Bell Labs Record. Contributed by Chuck Hensley.

pdf 75Aug BLR P288 G36 Handset Popular

By 957 downloads

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75Aug_BLR_P288_G36_Handset.pdf

75Aug BLR P288 G36 Handset

Bell Labs Record. Contributed by Chuck Hensley.

pdf 75Dec BLR P427 Recycling Plastic Popular

By 1223 downloads

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75Dec_BLR_P427_Recycling_Plastic.pdf

75Dec BLR P427 Recycling Plastic

Bell Labs Record. Contributed by Chuck Hensley.

pdf 75Jan BLR p16 - Alpha and Omega of the Network Popular

By 793 downloads

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BLR_Jan75_Alpha_and_Omega_of_the_Network_tci.pdf

75Jan BLR p16 - Alpha and Omega of the Network

Showcases some interesting consoles and telephone sets. Contributed by Paul Fassbender.

pdf 75Jan BLR P18 Customer Products Evolution Popular

By 2368 downloads

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75Jan_BLR_P18_Customer_Products_Evolution.pdf

75Jan BLR P18 Customer Products Evolution

Bell Labs Record. Contributed by Chuck Hensley.

pdf 75Mar BLR P175 FlatScreen Video Popular

By 622 downloads

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75Mar_BLR_P175_FlatScreen_Video.pdf

75Mar BLR P175 FlatScreen Video

Bell Labs Record. Contributed by Chuck Hensley.

pdf 75May BLR P235 Design Line Telephones Popular

By 988 downloads

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75May_BLR_P235_Design_Line_Telephones_tci_ocr.pdf

75May BLR P235 Design Line Telephones

Bell Labs Record. "DESIGN LINE* Decorative Telephones: Just the Beginning" The first five WE-produced Design Line sets include Stowaway, Celebrity, Elite, Exeter, and Accent. Three additional sets were soon added, using housings from American Telecommunications Corporation and WE-installed components. Trials were held in several locations, including PhoneCenter Stores. Contributed by Chuck Hensley.

pdf 75May BLR P243 770A PBX New Features Popular

By 1010 downloads

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75May_BLR_P243_770A_PBX_New_Features.pdf

75May BLR P243 770A PBX New Features

Bell Labs Record. Contributed by Chuck Hensley.

pdf 75Oct BLR P377 Transaction Telephone Popular

By 927 downloads

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75Oct_BLR_P377_Transaction_Telephone.pdf

Bell Labs Record. Contributed by Chuck Hensley.

pdf 75Sep BLR P316 DIMENSION PBX Popular

By 2840 downloads

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75Sep_BLR_P316_DIMENSION_PBX.pdf

75Sep BLR P316 DIMENSION PBX

Bell Labs Record. Contributed by Chuck Hensley.

pdf 76Apr BLR P91 First 50 Years Popular

By 969 downloads

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76Apr_BLR_P91_First_50_Years.pdf

76Apr BLR P91 First 50 Years

Bell Labs Record. Contributed by Chuck Hensley.

pdf 76Jan BLR P3 Touch A Matic 32 Popular

By 1230 downloads

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76Jan_BLR_P3_Touch_A_Matic.pdf

76Jan BLR P3 Touch A Matic 32

Bell Labs Record. Touch-a-matic 32. Contributed by Chuck Hensley.

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.

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