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March 23, 1988


By CBR Staff Writer

Nippon Telegraph & Telephhone Corp will start marketing 8Kbps speech coder-decoder interface boards from June for use with its TDM-M3300 time-division multiplex system: the boards will double the number of multiplexed voice channels supported on the Super Digital Circuit, NTT’s high-speed digital leased line; the Codec uses adaptive predictive coding with adaptive bit-allocation to select the most important elements of speech signal; the TDM M3300 takes up to six of the cards.

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