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Show when a speaker pauses to catch his breath or collect his thoughts, both channels become idle. Whenever the number of calls exceed the number of voice paths available, TASI takes advantage of the idle speech time by flicking voices from channel to channel. In other words, a talker's voice niay travel over several different channels during the course of a conversation. Just before these "Talk spurts' reach the lis terner, they are sorted out and re-united by TASI to assure amooth transmission trans-mission and, at the same time, maintain complete privacy. To find idle moments in channels, TASI examines each one 8,000 times a second, 1 "A5S Tsstsd The world's most efficient telephone tele-phone mechanism, which takes advantage of . even the slightest pause in a telephone conversation, is now undergoing preliminary tests on a transatlantic cable system, Mr. E. C. Aaberg. Manager of the Mountain States Telephone. Company said. The Long Lines Department of American Telephone and Telegraph Tele-graph Company is conducting the tests over a telephone cable system that links the United States with Great Britain. The new device, called TASI for Time Assignment Speech Interpolation, is completely transistorized and will approximately double the original capacity of the cable system. TASI is due to go into service this summer. The cable system, similar to those that now connect the mainland main-land of the United States with continental con-tinental Europe, Hawaii and Alaska, is presently equipped to carry 48 -simultaneous conversations. con-versations. Mr. E. C. Aaberg said this is the way TASI works: An overseas over-seas call, like most long distance telephone conversations, travels over a pair of channelsone for each direction of speech. As one party speaks, the second party listens. Thus, one channel is being used white the other is idle. And |