Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 169
£>_ rQCni Ringer ^ Shunt•^Imp. Cal/.Device r 3Cond. Cord. ^P , Red I C—i! 02 W Orange Call Device Fig. 148.—Wiring diagram for a wall telephone with an extension. … Transmitter Shunt Fig. 149.—Wiring diagram of a wall telephone with an extension. Figure 147 shows the circuit of a desk telephone of the direct-currentreceiver type just as the instrument is wired. Figures 148 and 149 show two different arrangements for connecting SUBSCRIBERS STATION EQUIPMENT 153…
Telephone
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