The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 551
. ^ xfi\— i J C*lWH WHIICM j.i#3LL ,0TA1 . «OTAB -l J>tlj SX5L is l Ws> ^I __._. ««TAHV Fig. 480.—First Selector with Trunk Release, Los Angeles of 13th March 1909. Fig. 479 shows the connections of acomplete circuit of the system as installed at Los Angeles.This figure should be compared… … Fig. 481.—Second Selector with Trunk Release, Los Angeles RELEASE TRUN*
Telephone
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