Communication systems are the various processes, both formal and informal, by which information is passed between the managers and employees within a business, or between the business itself and outsiders. In telecommunication, a communications system is a collection of individual communications networks, transmission systems, relay stations, tributary stations, and data terminal equipment (DTE) usually capable of interconnection and interoperation to form an integrated whole.The components of a communications system serve a common purpose, are technically compatible, use common procedures, respond to controls, and operate in unison.

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