Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 531
desired,she will speak over an order-wire to the switching operator at themultiple board. The switching operator will designate the trunkand insert the plug of this tnunk into the multiple jack of the desiredlocal line. The toll operator at the same time will insert the callingplug into a jack of… … •EI-»^,r^g«»»jejJS^yj;C -SECTION OF TOLL BO.\ED. handling connections between toll stations arc numerous, but inmany cases one or more separate positions are provided, calledthrough positions. In a case having these through positions, if the toll operator re-ceives a call from a toll line for…
Telephone
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![An illustration from Telephones and telegraphs: 1902 : [and Municipal electric fire alarm and police patrol systems] (1906)](https://img.insideoutlibrary.com/img/200/ia-cu31924022817674-82-33.webp)
