Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 308
SUBSCRIBER 1 SUBSCRIBER 2 Fig. 19. P fOO COMMON-BATTERY TELEPHONE CB yT^r U.E [ … SUBSCRIBER 1 CENTRAL OFFICE Fig. 20. SUBSCRIBER 2 line. Such combined working is extensively employed forgaining increased earning capacity of the wire plant. Telephone Circuits. — Figs. 19 and 20 show respectivelythe connections of the telephonic apparatus for the inter-communication of two…
Telegraph
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