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332 McCoy AND WARNER October
without mutual interference. The relay and terminal equipment installed was originally designed for this purpose. However, it was recognized from the first that the bandwidth of each cable channel was sufficient to permit television transmission. New terminal equipment must be installed to convert the cable for television transmissions. The present equipment now used on the coaxial cable for television transmission will permit transmission of a television band of 2.7 megacycles. This is not sufficient to carry the full requirements of the present 525-line, 4.5-megacycle standard television broadcasts, but recent developmental work will make possible wider-band television transmission (up to 8 megacycles) when the demand arises. While current theater television has adopted the 525-line standard used by television broadcast stations, full utilization of the possibilities of theater television may require the use of higher definition and widerband transmissions, which would raise a problem as to the suitability of the coaxial cable for intercity transmission of the theater television programs. If color television is desired by the theater television interests, bandwidths of from 8 to 16 megacycles probably would be desirable if not essential. At the present time, no extensive intracity coaxial -cable system is available, but some coaxial-cable links are in operation in New York and other cities.
The current coaxial-cable television rates filed by the A. T. and T. and associated Bell System telephone companies and effective May 1, 1948, contemplate charges which raise a serious economic question both for television broadcast stations and theater television. A single television channel between two cities costs the user $35.00 a month per airline mile for eight consecutive hours each day, and $2.00 a month per mile for each additional consecutive hour. Thus, for 240 hours of service in one month, the rate would be $35.00 per airline mile. For occasional or part-time service, the rate is $1.00 per airline mile for the first hour and 25 cents per mile for each additional consecutive 15 minutes. Additional charges are made for the use of terminal equipment; $500 per month is charged for a connection to the television network for eight consecutive hours daily. This interconnection charge for occasional service is $200 per month, plus $10.00 per hour of use. To complete the service, a Bell System sound channel must be used, at the regular rates applicable to the frequencymodulated service. If two users share time on the 'same channel, $25.00 a month per airline mile is charged for four consecutive hours of daily service, with an interconnection charge of $350 for each user.