The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 240
of the more importantC.B. systems, it now becomes necessary to describe how theyare worked in actual practice. Western Electric Co.s System.—This system, which is thestandard in this country, is used in the most important ex-changes here and in America. It is a development of theHayes system, with… … Fig. 240.—C.B. Line Connections simplified which are all connected in parallel with the one shown. Thepositive pole of the 11-cell storage battery (24 volts) is shownconnected to earth, the negative pole being connected throughthe line relay and a contact of the double cut-off relay, tothe b wire…
Telephone
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