File:Bell telephone magazine (1922) (14776286283).jpg

Identifier: belltelephonemag11amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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commercial system wasopened to traffic between New York and London. The nextyear brought a second circuit on this New York-London routeand two circuits between Europe and South America. Themap, Fig. 1, shows in solid lines the lace work of internationaltelephone circuits which exists today and with dotted lines theadditional circuits in prospect. These invisible speech high-ways extend the scope of telephone service so that a UnitedStates subscriber may now be connected with about 33,000,000other telephones in the world which constitute 91 per cent ofthe worlds telephones. The value of these circuits lies in their ability to tie togetherthe existing continental wire networks into a world telephonenetwork. Thus, one of the first problems was to accomplisheffectively the junction of space transmission and wire trans-mission of speech. Interconnecting Wire and Radio Systems More clearly to comprehend the nature of this problem letus examine the diagram shown in Fig. 2. This is a diagram
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Prepared by Department of Operation C, Amtrican Telephox Fig. 1. International Radio Telephone CrRcurrs of the World as of January 1, 1932.Telegraph Company, Shows on Each Circuit Line An Identification Number. More Detailed Information is Tabu by Identification Numbers on the Back of this Map. Circuit Index No, Circuit Terminals Ownership NORTH AMERICA-EUROPEExisting Circuits (1) 1-ondon-NewYork (Long Wave).British P. O.-Am. Tel. and Tel. Co (2) Jxmdon-New York British P. O.-Am. Tel. and Tel. Co (3) London-New York British P. O.-Am. Tel. and Tel. Co \-ijl-ondon-NewYork British P. O.-Am. Tel. and Tel. Co Pro«osed Circuits (5; .ondon-New York (Long Wave). British P. O.-Am. Tel. and Tel. Co Lon Ion-Montreal British P. O.-Canadian Marconi Ltd Berlin-Mexico City German P. O.-Mexican Govt. NORTH AMERICA-SOUTH AMERICA Existing Circuits Bue-ios Aires-New York Compania Internacional de Radio*-Am. Tel. and Tel. Co New York-Rio de Janeiro Am. Tel. and Tel. Co.-Companhia Radio Inter-national do

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