Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 265
SECTION. Above the multiple jacks are shown the line and clearing-out sig-nals. Those at the top of each space are the line drops, the clear-ing-out drops occupying the two lower rows. All drops are of theclectricaliv self-restoring type shown in Fig. 178. The drop spaces MAGNETO MULTIPLE… … FIG. 21G.-GENERAL VIEW OF PARIS SWITCH-BOARD. of the board, however, which includes the jack, is divided into sevenpanels for each section. The horizontal white lines extendingthrou-h the face of the board are dividing lines between each bank 244 AMERICAN TELEPHONE PRACTICE. of lOO jacks, there…
Telephone
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