Digital voice conferencing system

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1970

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The design of a Digital Voice Conferencing System was accomplished. Each one of ninety-nine keysets can establish one conference circuit on which it can both talk and listen and up to fifteen other conferences which it can monitor. The keyset operator selects which conferences he desires from his available selection of sixteen out of the total of ninety-nine. Each keyset has its voice inputs converted to a digital code which is Time Division Multiplexed into a preselected digital accumulator which is one of ninety-nine conference loops. The digital accumulators Time Division Multiplex their stored codes back to the keysets as selected by the keyset operators. The stored codes from the digital accumulators are converted back to voice signals for each individual keyset. The Central Control has the ability to change the selection of sixteen conferences each keyset operator has by software changes. [...]

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