Telephone toll system in region within radius of about 50 mi from Chicago; 21 toll centers have been established at which are handled toll traffic of their own exchanges and 95 other exchanges in area; descriptions of toll plan and toll plant, methods of handling toll calls, volume of traffic handled, etc.


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    Titel :

    Telephone toll plant in the Chicago region


    Weitere Titelangaben:

    Am. Inst. Elec. Engrs. -- Jl


    Beteiligte:
    Smith, B. (Autor:in) / West, G.B. (Autor:in)


    Erscheinungsdatum :

    1928


    Format / Umfang :

    6 pages


    Anmerkungen:

    7 Figs.


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Telephone toll plant in the Chicago region

    Smith, B. / West, G.B. | Engineering Index Backfile | 1929


    Telephone toll plant in the Chicago region

    Smith, Burke / West, G. B. | IEEE | 1928


    Toll telephone traffic

    Fowle, Frank F. | Engineering Index Backfile | 1914


    Toll-telephone question in Finland

    Talvitie, Y. | Engineering Index Backfile | 1934


    Testing toll and rural telephone lines

    Twigg, G.E. | Engineering Index Backfile | 1930