Bell telephone magazine (1922) (14569430718)

Identifier: bellvol25telephonemag00amerrich (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

Text Appearing Before Image:

A)i emergency radio telephonic station. Apair of these compact statioiis can bridgea tefuporary gap in physical circuits tohandle two-way conversations 234 Bell Telephone Magazine WINTER

Text Appearing After Image:

Above: Installed on the roof of a truck cab is the equipmentused in providing mobile radio telephone service near West Point, en-abled llne-of-sight pathswith good clearance tobe employed over this45-mile route. Relay Systems Telephone engi-neers have long envi-sioned the employmentof micro-wave radio re-lay systems for thetransmission of bundlesof telephone channelsor television channelsacross the land in muchthe fashion that coaxialcables are now beingemployed. The attrac-tion of such a system,with all facilities con-Below: A truck driver about to answer a telephone call centrated at the ter-which is reaching him through Bell System mobile radio p^ji^al and repeater points and no intercon-necting cable or wiresto install or maintain,is very great. Such asystem, to be a candi-date for general use,however, must meetvery exacting transmis-sion requirements, mustbe highly reliable, andmust compare favor-ably in cost with wirefacilities. To assure full devel-opment of the potenti-alities

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1922

Prelinger Library

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