Encyclopedia > Switching

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The process, usually automated, of connecting and disconnecting telephone calls through a telephone network. Carried out by machines called Switches (US term), or Exchanges (UK term for the same thing).

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579 BC

... BC 540s BC 530s BC 520s BC Events and Trends 579 BC - Servius Tullius becomes king of Rome 572 BC - Death of Zhou jian wang[?], King of the Zhou Dynasty of China. ...