File:Bell telephone magazine (1922) (14569431708).jpg

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Description
English:

Identifier: belltelephonemag4344amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

View Book Page: Book Viewer
About This Book: Catalog Entry
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Text Appearing Before Image:
Because of recent developments,a bright future looms for this30-year-old communications medium
Text Appearing After Image:
Robert F. Latter, General Methods Engineer,Long Lines Department, A. T. & T. Co. H Ever since the early days whenlong distance calls were handledover a pair of copper wires, with eachpair carrying one conversation at a time,the Bell System has wrestled with threeproblems: • How to provide enough circuits tomeet the ever-increasing demand forlong distance service; • How to keep improving transmissionto satisfy the needs and expecta-tions of customers; • How to keep the price of these cir-cuits down. In recent decades, developing technol-ogy has made possible the introduction of broadband transmission systems thatfirst utilized coaxial cable conductors andlater, microwave radio relay channels.These systems furnish large numbers ofhigh quality long distance circuits at re-duced cost. Thus, in 1930 the averageLong Lines Department cost per circuit-mile of the long distance facilities was$217. This was reduced to about $29 in1963 and the figure is still going down.Under these cir

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https://www.flickr.com/photos/internetarchivebookimages/14569431708/

Author Internet Archive Book Images
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Volume
InfoField
43-44
Flickr tags
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Flickr posted date
InfoField
27 July 2014

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This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/14569431708. It was reviewed on 17 September 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

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