The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 601
en selected for the principal Paris exchange.20 571 572 APPENDIX Fig. 517 shows the principal points of the system, which isbased on the Stone system of G.B. working. Two stationsax and a2 and lines are shown connected to the exchange, withthe line calling apparatus and a pair of connecting cords… … TO SKOBO UNE OF BOARDi i*go£=a, flS*3!^0, P»«TY DNESliSSMIftfHSMULTIPLE ,Qmswcti»cjack TOCftuiitBjuiPMnn V - Cftaiieiwap W Fig. 516.—Connections for Double-Jack Party-Line Working ture of line relay closes contact s, completing battery circuitthrough contact of cut-off relay ur, lamp al, pilot…
Telephone
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
