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; Telephony, vol. 99, no. 14, Oct. 4, 1930, pp. 14-20, 10 figs.)
A general switching plan for telephone toll service
Bell System Tech. Jl
Bell System Technical Journal ; 9 , n 3
1930
19 pages
12 Figs.
Article (Journal)
English
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A general switching plan for telephone toll service
Engineering Index Backfile | 1930
|A general switching plan for telephone toll service
Engineering Index Backfile | 1930
|Standard switching plan for telephone toll service
Engineering Index Backfile | 1931
|Engineering Index Backfile | 1934
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