Journal of the Society of Motion Picture Engineers (1930-1949)

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1949 THEATER TELEVISION 331 VI. TRANSMISSION FACILITIES FOR THEATER TELEVISION Availability of Relay Facilities — Theater television programs may be relayed by microwave radio relays, coaxial cables, or balanced telephone wires. The telephone company in certain areas is already equipped to furnish all three types of transmission facilities, and is furnishing these services on a rental basis to certain television broadcast stations and networks. The services furnished by the telephone company include intercity transmission of programs by coaxial cable or by microwave relay; studio-transmitter links and remote pickups by cable, relay, or wire. Other organizations also are equipped to furnish intercity microwave relay service in certain areas. The principal problems concerning the three methods of relay will be described briefly. A. T. and T.'s Coaxial Cable— By May, 1949, the A. T. and T. coaxial cable provided the primary means of transmission of television programs from New York to Richmond on the east coast (through the cities of Philadelphia, Baltimore, and Washington) ; from Philadelphia to Chicago (through the cities of Pittsburgh, Cleveland, and Toledo) ; from Cleveland to Buffalo; and from Chicago to St. Louis. By the same month, A. T. and T. also had in operation microwave radio relays for transmission of television programs from New York to Boston; Toledo to Detroit; and Chicago to Milwaukee. Before the end of 1949, A. T. and T. plans to complete network links (either coaxial cable or radio relay) from Boston to Providence; New York to Syracuse (through Schenectady and Utica) ; Buffalo to Rochester; Milwaukee to Madison; Philadelphia to Wilmington; and from Toledo south to Dayton, Cincinnati, and Columbus. Likewise, in 1949 a radio relay between San Francisco and Los Angeles is planned. At the present time, the Bell System does not contemplate extension of its television relay facilities across the continent in the near future. The means for a transcontinental television network, however, now exist since the coaxial cable, equipped for long-distance telephone service, has been completed between St. Louis and Los Angeles. Telephone company officials have recently stated that a television channel from New York to Los Angeles could be made ready in about a year after the service is ordered. The Bell System coaxial cable, first authorized by the FCC in 1936 on an experimental basis,5 is primarily used to multiplex telephone transmission. As many as 480 telephone conversations can be transmitted simultaneously on a single channel of each 8-channel cable