Folder BSTJ - Bell System Technical Journal

In addition to individual scans posted here, see the index to the on-line BSTJ Archive ...

   Bell System Technical Journal Index with Links - 1922 - 1983

Documents

pdf 60jul BSTJ p995 - Design and Use of Pushbutton Tel Sets Popular

946 downloads

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60jul_BSTJ_p995_Design_and_Use_of_Pushbutton_Tel_Sets_ocr_tci (1) (1) (1) (1).pdf

60jul BSTJ p995 - Design and Use of Pushbutton Tel Sets

Human Factors Engineering Studies of the Design and Use of Pushbutton Telephone Sets by R. L. DEININGER. July, 1960. Describes 18 pushbutton layouts tested. "Technological progress in recent years has brought pushbutton signaling from the telephone set within sight of economic feasibility. What, from the user's viewpoint, are the desirable operating characteristics of the key set which should guide development and manufacture? And how do people process information when they key a telephone number?" Referenced in Singing Wires, April 2020. Contributed by Paul Fassbender.

pdf 60jan BSTJ p235 - Pushbutton Callilng with a Two-Group Voice Frequency Code Popular

744 downloads

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60jan_BSTJ_p235_Pushbutton_Callilng_with_a_Two-Group_Voice_Frequency_Code_ocr_tci (1).pdf

60jan BSTJ p235 - Pushbutton Callilng with a Two-Group Voice Frequency Code

By L. SCHENKER. "A customer voice-frequency pushbutton signaling scheme involving a new two-group signal code, termed "four-by-four", is described. It is shown that the use of this code, with judiciously chosen frequencies, permits the detection of bona fide signals after transmission over any ordinary voice connection and facilitates discrimination against false signals resulting from speech. Apparatus for generating the tones is described, and the principles of reception are discussed." Contributed by Paul Fassbender.

pdf 79jul BSTJ - TSPS Operator Training Facilities Ocr Popular

1986 downloads

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BSTJ_Jul79_-_TSP_Operator_Training_Facilities_ocr.pdf

79jul BSTJ - TSPS Operator Training Facilities Ocr

Training simulator with multiple TSPS stations. Bell system Technical Journal, Page 1347. Contributed by Steve Cichorsky.  Ocr by Clint Gilliland.

pdf 61may BSTJ p649 - Functional Design of a Voice Switched Speakerphone Popular

1218 downloads

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61may_BSTJ_p649_Design_Voice_Switched_Speakerphone.pdf

61may BSTJ p649 - Functional Design of a Voice Switched Speakerphone

Bell System Technical Journal. 3A Speakerphone.  Missing pages 64 and 65.  Contributed by Gary Goff. 

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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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