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 were available here:
  http://www.americanradiohistory.com/Bell_Laboratories_Record_Issue_Key.htm

Categories

Documents

pdf 73Apr BLR P99 Portable Conference Telephone - 50A Speakerphone Popular

By 166 downloads

Download (pdf, 1.98 MB)

73Apr_BLR_P99_Portable_Conferene_Telephone_50A_Speakerphone.pdf

73Apr BLR P99 Portable Conference Telephone - 50A Speakerphone

Bell Labs Record.  Contributed by Chuck Hensley.

pdf 73Dec BLR P353 PICTUREPHONE Big Picture Popular

By 141 downloads

Download (pdf, 1.96 MB)

73Dec_BLR_P353_PICTUREPHONE_Big_Picture.pdf

73Dec BLR P353 PICTUREPHONE Big Picture

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Jan BLR P9 Key Telephone 4A Call Distributor Popular

By 143 downloads

Download (pdf, 1.44 MB)

73Jan_BLR_P9_Key_Telephone_4A_Call_Distributor.pdf

73Jan BLR P9 Key Telephone 4A Call Distributor

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Jun BLR P187 Payphone Sentry Mounts Popular

By 111 downloads

Download (pdf, 334 KB)

73Jun_BLR_P187_Payphone_Sentry_Mounts.pdf

73Jun BLR P187 Payphone Sentry Mounts

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Mar BLR P94 TouchTone Dial Foil Popular

By 119 downloads

Download (pdf, 815 KB)

73Mar_BLR_P94_TouchTone_Dial_Foil.pdf

73Mar BLR P94 TouchTone Dial Foil

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73May BLR P136 805A PBX Popular

By 177 downloads

Download (pdf, 1.85 MB)

73May_BLR_P`136_805A_PBX.pdf

73May BLR P136 805A PBX

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73May BLR P158 TOUCH A MATIC Dialer Keyset 2872 Popular

By 185 downloads

Download (pdf, 336 KB)

73May_BLR_P158_TOUCH_A_MATIC_Keyset_2872.pdf

73May BLR P158 TOUCH A MATIC Dialer Keyset 2872

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Oct BLR P273 Handicapped Voice Dialing Popular

By 117 downloads

Download (pdf, 1.70 MB)

73Oct_BLR_P273_Handicapped_Voice_Dialing.pdf

73Oct BLR P273 Handicapped Voice Dialing

Bell Labs Record. Contributed by Chuck Hensley.

pdf 73Sep BLR P233 4A Speakerphone Popular

By 142 downloads

Download (pdf, 1.21 MB)

73Sep_BLR_P233_4A_Speakerphone.pdf

73Sep BLR P233 4A Speakerphone

Bell Labs Record. Contributed by Chuck Hensley.

pdf 74Dec BLR P358 Credit Authorization Transaction Telephone Popular

By 109 downloads

Download (pdf, 917 KB)

74Dec_BLR_P358_Credit_Authorization_Transaction_Telephone.pdf

74Dec BLR P358 Credit Authorization Transaction Telephone

Bell Labs Record. Contributed by Chuck Hensley.

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

By 504 downloads

Download (pdf, 479 KB)

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 140 downloads

Download (pdf, 1.20 MB)

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 237 downloads

Download (pdf, 2.11 MB)

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 747 downloads

Download (pdf, 9.28 MB)

812A PBX (complete).pdf

74nov BLR - p302 812A PBX

November 1974 Bell Labs Record.

pdf 74Nov BLR P303 812A PBX Popular

By 137 downloads

Download (pdf, 2.06 MB)

74Nov_BLR_P303_812A_PBX.pdf

74Nov BLR P303 812A PBX

Bell Labs Record. Contributed by Chuck Hensley.

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

By 150 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 500 downloads

Download (pdf, 11.19 MB)

74sep_BLR_P238_Modular_Set_Intro.pdf

74sep BLR P238 - Modular Set Introduction

11MB.  Sep 74, Bell Labs Record, Pages 238-244 plus covers. "Telephone Sets Go Mod (Modular, That Is)"  Modular Wiring.

pdf 74Sep BLR P239 Telephones Go Modular Popular

By 182 downloads

Download (pdf, 1.42 MB)

74Sep_BLR_P239_Telephones_Go_Modular.pdf

74Sep BLR P239 Telephones Go Modular

Bell Labs Record. Contributed by Chuck Hensley.

pdf 74Sep BLR P253 Key Telephone Modular Panels Popular

By 252 downloads

Download (pdf, 1.58 MB)

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 369 downloads

Download (pdf, 1.95 MB)

75Aug_BLR_P288_G36_Handset.pdf

75Aug BLR P288 G36 Handset

Bell Labs Record. Contributed by Chuck Hensley.

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