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 28
Fig. 13.—Thousand-line exchange(three kinds of junctions). Fig. 14.—Thousand-line exchange(re-arrangement). One group of lineswitches and their trunks may serve more than 100subscriber lines. (Fig. 14.) In this illustration, one lineswitch junctionL handles all the traffic originated by 200 lines.…
Telephone
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