Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 645
FIG. 457.—COOK DISTRIBUTING FRAME. made at the main distributing frame, a certain line entering the ex-change is always definitely associated with a certain number in themultiple jacks. Furthermore, the number of a subscribers linemust of necessity always correspond with the number of the mul-tiple…
Telephone
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
