Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 284
262 AMERICAN TELEPHONE PRACTICE. used in the exchange of this company is a modification of the Cook-Beach system, being shown in some detail in Fig. 224. It may be said that as applied to manual switch-boards the trans-fer system has been, and is being, gradually relegated to the past. … FIG. 224.-GRAND RAPIDS TEAN.SFER BOARD. Of the two largest transfer systems the one at San Francisco, al-ready described, is about to be replaced by a multiple system. Thenext largest, that of the Citizens Telephone Company at GrandRapids, Mich,, giving service to over 5000 lines, is now replaced…
Telephone
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