Telephony a Comprehensive And Detailed Exposition of the Theory And Practice of
Telephony a Comprehensive And Detailed Exposition of the Theory And Practice of
Ill American School Chicago
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Portion of Line- Switch Unit in a schematic way the parts of a line switch that are individual to a subscriber's line, and also those that are common to a group of fifty Fig. 387. Line-Switch Unit Fig. 388. Line- Switch Unit 536 TELEPHONY or one hundred lines. Those portions of Fig. 389 which are indi- vidual to the line are shown below the dotted line extending across the page. The task of understanding the line switch will be made somewhat easier if Figs. 385 and 389 are considered together. ...The individual parts of the line switch are shown in the same relation to each other in these two figures with the exception that the bank of line and trunk springs in the lower right-hand corner of Fig. 389 have been turned around edgewise so as to make an understanding of their circuit connections possible. The vertical and rotary sides of the subscriber's line are shown entering at the lower left-hand corner of this figure, and they pass Fig. 389. Circuits of Line-Switch Unit to the springs of the contact bank.
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