Communications system in telecommunication, is a collection of individual communications networks, transmission systems, relay stations, tributary stations, and data terminal equipment (DTE), usually capable of interconnection and interoperable to form an integrated system as a whole.
The components of a communication system serve a common purpose, are technically compatible, use common procedures, respond to controls, and operate in unison.
Examples of communications subsystems is the Defense Communications System (DCS) with (a) a satellite link, (b) the interconnect facilities at each Earth terminal of the satellite link, and (c) an optical fiber cable with its driver and receiver in either of the interconnect facilities.
Communication subsystem basically consists of a receiver, frequency translator and a transmitter. It also contains transponders and other transponders in it. communication satellite communication system receives signals from the antenna subsystem.
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