Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 487
RED SERVICE. 465 tery system, and makes known to the operator the number of thesubscriber with whom he desires a connection. The operator thenmakes the connection with the called subscriber, and upon securinghis response notifies the calling subscriber to deposit a coin of theproper denomination.… … FIG. 340.—STROUD CONTROLLER FOR STREET SERVICE. manufactured by the Gray Telephone Pay Station Company, ofHartford, Conn. In these, coins dropped through the slots are,if of the proper denomination, caused to strike against one or moregongs, the sound being transmitted to the operator as…
Telephone
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