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 Telephony, vol. 99, no. 14, Oct. 4, 1930, pp. 14-20, 10 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
Am. Inst. Elec. Engrs. -- Jl
1930
5 pages
6 Figs.
Article (Journal)
English
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A general switching plan for telephone toll service
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