Abstract
ACCORDING to a recent announcement by the American Telephone and Telegraph Company (Bell Lab. Rec., 22, No. 9; May 1944) plans have been made for the construction of a large amount of coaxial cable to be operated by radio relays. Tentatively, the coaxial extension plans call for the installation of 6,000–7,000 route miles of coaxial facilities in the next five or six years to help meet expected increasing demands for long-distance telephone service. These facilities would be suitable for interconnecting television stations for network operations. Work on the 295-mile Atlanta to Jacksonville route is in progress, and is expected to be in service for telephone purposes by the spring of 1945. Present coaxial equipment will provide television channels of 2,700,000 cycles in width. Tests have shown this equipment capable of transmitting the visual images with satisfactory clearness. Further technical improvements will make it possible to use a much wider band of frequencies, which will permit simultaneous use of the same coaxial for an improved (4,000,000 cycles) television channel and a large number of telephone messages.
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Use of Inter-city Telephone Circuit for Television. Nature 154, 331 (1944). https://doi.org/10.1038/154331b0
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DOI: https://doi.org/10.1038/154331b0