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 433
her the system employs a single office or a numberof them. Not only do the reasons which make the division of manual systemsundesirable apply with but little force to automatic systems, but thesaving in cable and conduit realized by division is much greater in amulti-office automatic system for two… … I—rV ADAMS O7 /DSOUTH NORMANDIE O77 M VERNON. VERMONT <5 v-~v FlG. 309.—Skeleton diagram of the automatic telephone system of Los Angeles, Cal. penses, and second because trunks between automatic offices are moreefficient than trunks between manual offices and a less number is thereforerequired.…
Telephone
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