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 149
c\ \ \ \ Fig. 124.—Individual trunks with common group. pled to all the shelves, each trunk ending in a connector, indicated bythe word common. The method of individual trunks used by the Automatic ElectricCompany is shown in Fig. 125. It consists essentially of one or moreindividual trunks and a… … Fig. 125.—Individual trunks with slipped common trunks. consisting of ten trunks which are given a bank slip between the differentshelves, although only a fraction of the total number of common trunksare used on any one shelf. This method of trunking was arrived at inthe following manner: Suppose…
Telephone
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