File:Bell telephone magazine (1922) (14755167205).jpg

Identifier: belltelephonemag00vol2930amerrich (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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ire, radio, mo-bile, or point-to-pointcommunications, all ofwhich the telephonecompanies n o w haveavailable in almost alllarge centers. A tele-phone man is part ofthe staff of practicallyevery civil defense or-ganization. Continuity andReliability ofService It is essential to pro-vide the service re-quired, of course; butunless continuity ismaintained and provi-sion is made forprompt restoration ofinterrupted service, it cannot be saidthat the job has been done. Tele-phone companies face this problemconstantly, and experience over theyears has shown the necessity forbuilding plant and arranging every-day operations to assure the maxi-mum of service reliability. The national toll network of theBell System is widely dispersed overmany routes and most of the largecities can be reached from several di-rections. Thus, if the normally usedcircuits are interrupted, alternativeroutes are immediately put in serviceand additional ones are readily avail-able. As a matter of regular routine, 149
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Shelters, drills, and first aid training are elements ofprotection for employees in telephone buildings strategically located traffic control bu-reaus are constantly informed regard-ing the condition of all major cir-cuits. They are able to take actionbefore serious delays occur. Since World War II, coaxial cableshaving a capacity of many hundredsof channels, and radio relay systemswith a potential capacity as great asor greater than the coaxial cable,have been installed on a large scale.Extensive use of these facilities hasnot only increased traffic-handling ca-pacities but has provided diversifica-tion of routes and types of equipment.For example, seven separate trans-continental routes, employing all 150 Bell Telephone Magazine AUTUMN BEFORE DISPERSION TOWEST Cll TOLL CIRCUIT ROUTE fLOCAl PLANT FOR(.REACHING TOLL CIRCUITS

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