The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 466
to the broken span. On longlines, and when the fault is a difficult one to find, an earthedbattery is connected to one end of the broken line, and thelinesman from time to time connects the faulty line to earth FAULTS AND THEIR LOCALISATION 437 through his galvo, and notes if lie gets an indication… … Fig. 413.—Portable Test Set weakened deflection will then be obtained when the fault ispassed. Intermittent line faults are a source of great trouble inlocating, as in the case of similar instrument faults. Such faults are readily detected in C.B. exchanges, asmomentary earth contacts which would…
Telephone
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