File:Bell telephone magazine (1922) (14569516620).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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the alarm center, by throwing keys dents to still another telephone com- and pushing buttons, to perform by pany office—the control office, means of remote control any one of which is responsible for the over-all ninety different operations within the continuity of the television program station sending the alarm. However,the alarm received may indicate a con-dition that only a maintenance man onthe scene can solve. Under such cir-cumstances, those at the alarm centerwill promptly get in touch with the or telephone service. Such offices arefound at a few widely separated keycities where various radio relay routescome together, and have the respon-sibility of directing circuit rearrange-ments or rerouting if the interruption force at the nearest maintenance cen- cannot be remedied quickly at the re-ter, which will dispatch a man to the lay station itself. point in difficulty. Meanwhile, al-ternative facilities will be handlingwhatever messages might have beensubject to interruption.
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This jnan is using testing equipment to adjust equipmentin a radio relay station At each relay station a certainamount of testing apparatus is avail-able and, as a result, a high percent-age of both preventive and repairwork can be handled onthe spot. Some trou-bles can be cleared bythe replacement of, say,a single tube, but othersmay require the replace-ment of an entire sub-assembly of equipment.Consequently, spareparts and sub-assembliesof apparatus for suchreplacement are kept ateach relay station.These can usually be in-stalled in about fifteenminutes after a main-tenance man has reachedthe relay station. De-fective pieces of equip-ment which have beenremoved from serviceare returned to themaintenance center,where the necessary ap-paratus for repair andadjustment is available.Some of the radio re- 1953 The Radio Relay Network 91

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