File:Bell telephone magazine (1922) (14756174205).jpg

Identifier: belltelephonevol3132mag00amerrich (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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rporation, forthe sole purpose of sup-plying bulk power at agiven location—morepower than one com-pany could supply by it-self. These power pro- 1953 Right-oJ-Way Companies 23 ducing organizationsare supported by aspider web of channelsfor voice and writtencommunications, tele-metering (transfer ofmeasurements from aremote location), andprotective relaying (ar-rangements to protectthe power system dur-ing occurrence of trou-ble conditions). Chan-nels are also requiredfor supervisory control(supervision and control from a cen-tral point of a number of functions atone or more remote locations) andfrequency and load control (auto-matic signals transmitted over a com-munications channel to regulate powergeneration). The 1952 construction expendi-tures of investor-owned electric powercompanies throughout the UnitedStates amounted to 2^ billion dol-lars, and the industrys post-war out-lays for new plants and equipmentnow total approximately 13 billions.The construction budgets of the com-
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The engine of this train is one of iS in an open-pitcopper mine operation whose movements are directedover Bell System private mobile telephone equipment their own communications facilities.Furthermore, power-line carrier com-munication systems have limitationsas to capacity and freedom from in-terference which tend to restrict theirgeneral expansion. The telephonecompanies, realizing the needs ofthese customers, are working closelywith them to provide the best com-munications facilities obtainable. As an example, one of the Bellcompanies recently executed an agree-ment with a large hydro-electricpower system to take over its entireprivate communications network, and panics for 1953 aggregate almost to provide for all future requirements. three billion dollars, and by the yearsend nearly 50,000,000 customers willbe using these services. In view ofthis rapid growth and the increasedusage by all customers, the power in-dustry has estimateci that it will re-quire a ten-fold increase in c

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