File:Bell telephone magazine (1922) (14569565518).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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t in the groups. Each maintenance center Is staffedwith trained craftsmen, who carry outtheir responsibilities by means of pe-riodic routine inspections at the relaystation and by being on call in caseof sudden trouble. Now, each relay point may be un-attended but it is not, so to speak, un- protected. A remarkable automaticalarm system is Installeci in each relaystation which can register scores ofdifferent situations, indicating normaloperation as well as some Irregularcondition. Thus, if a tube fails, com-mercial power is cut off, a relay balks,the station door is opened, or otherdifficulties arise, the alarm system willInstantly flash news of the event to analarm center, where an ingeniousarrangement of lights Indicates thelocation and nature of the trouble. Alarm centers are established Incertain maintenance centers—usuallyone alarm center to each three of thelatter. The alarm system Is capableof handling the troubles reported byas many as 12 radio relay stations onthe network.
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Signal bays at an alarm center. Here a light flashes and a bell ri)tgs to notify anattendant of some irregularity at a radio relay station within his territory 90 Bell Telephone Magazine SUMMER \ Actually, the alarm system is so ar- A further duty of those at the ranged that it is possible for those at alarm center is to report such inci- 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-s

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