File:Bell telephone magazine (1922) (14756139275).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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Otie of the early forms of preve)itive )>iai)itena>ice: check-ing the cords for wear at a veteran manual switchboard 2o6 Bell Telephone Magazine WINTER tral office equipments, and somewhatmore than 40 per cent of their tolltraffic is handledby mechanized equip-ment which permits the originatingoperator to complete calls by dialmethods. Amazing is not too stronga word! Preventive maintenance has grownin requirements and methods, pro-gressively, as the telephone systemhas increased In complexity. Nolonger are troubles limited to the In-dividual customers telephone, linewire, and simple manual switchboardequipment; nor is the plant manslook-see sort of Inspection a com-pletely effective measure. AdvancesIn the art of dial telephony have in-troduced common equipment, so-called because It is used by more thanone line in the office. Dial senders,decoders, and markers, often re-ferred to as the mechanical opera-tors, fall into this category. Al-
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A regular preve)ilive-)iiai)itenancc task: cleajting thealternative ringing 7nachine though used to establish a call, theyautomatically release upon comple-tion of their function, to becomeavailable for other calls. Compli-cated test equipment, mounted onframes or test wagons and In port-able test sets, provides means forperiodic checking of the operatingcapabilities of such equipment, to aid in revealing any potential troubleconditions that may exist. Built-in Preventive Maintenance During this era which we might callthe telephone age, an ever-presentdesire to Improve telephone serviceIs apparent. Let us look now at the devel-opment of preventive maintenancemethods for dial central office equip-ment. Step-by-step, the first typeof dial equipment used in the BellSystem, had no means for automati-cally recognizing trou-ble conditions beforethey affected customerservice. Preventivemaintenance effort con-sisted of inspection, lu-brication, and manualtesting of the dial equip-ment under l

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