Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 396
ugh the coil of relay, B, to thecenter point of the outgoing trunk repeating coil, thence over bothsides of the trunk line in multiple to the center point of the incom-ing trunk repeating coil, thence to ground through the relay, C, atthe incoming trunk end. The relay, C, will thus be operated,… … FIG. 293-CONNECTION BETWEEN TWO SUBSCRIBERS THROUGHTWO OFFICES-STROMBERG-CARLSON SYSTEM. TRUNKING SYSTEM BETWEEN COMMON BATTERY OFFICES. 375 outgoing end, and the relay, C, at the incoming end will be ener-gized when the A operator plugs into the outgoing jack, and willremain energized as long as…
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