Comprehensive plan for improved switching of long-haul toll telephone traffic in United States and eastern Canada; methods of designing toll plant to give adequate transmission efficiency for all connections established in accordance with this plan; new method of providing amplification at intermediate switching points replacing cord-circuit repeater method. (See also Am. Inst. Elec. Engrs. -- Jl vol. 49, no. 9, Sept. 1930 pp. 775-779, 6 figs; and Bell System Tech. Jl., vol. 9, no. 3, July 1930, pp. 429-447, 12 figs)
A general switching plan for telephone toll service
Telephony
Telephony ; 99 , n 14
1930
7 pages
10 Figs.
Aufsatz (Zeitschrift)
Englisch
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A general switching plan for telephone toll service
Engineering Index Backfile | 1930
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