File:Bell telephone magazine (1922) (14753497841).jpg

Identifier: belltelephonemag18amerrich (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

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elocal central office. In 1931 satisfactory two-way conversa-tions were held over a cable carrier circuit looped back andforth over different pairs; it was more than 7500 miles long,and had a total attenuation of about 12,000 db. Subse-quently, buildings were erected at Pleasant Grove and LongValley to house cable-carrier repeaters. At these locationstests were made on repeater stations designed to be left forconsiderable periods of time without attendance. Also, inorder to test the possibility of neutralizing or balancing outcable crosstalk by introducing a compensating unbalance atone point in a repeater section, a small building was con-structed near Mendham, N. J., to house assemblies of balanc-ing coils and condensers. Subsequently, several of these newtype-K systems were installed in anticipation of later need forcommercial service between Toledo, Ohio, and South Bend,Indiana, and all parts subjected to complete tests. Tests are now being made, at Morristown and vicinity, of 102
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Trailer ix Use at Edgewood, Tex.,FOR Measurements of Open-wire Crosstalk Ultra-short-wave Antenna for Radiotelephone Experiments between Green Harbor and Provincetown, Mass.

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