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Communication Systems
Communication systems are widely used to transmit and receive data, voice and video. These systems are available in many configurations and with features that work with different types of signal formats. Communication Systems have a number of components like transmission and relay stations, tributary stations, data terminal equipment, voice and data handling systems, encoders and decoders and so on.
Communication systems can be digital, analog, hard-wired or wireless. Digital communication systems use digital technology with fiber optics to transmit or receive high fidelity signals. Copper wires are also used for transmission but they have small losses and the signals have to be amplified at frequent intervals.
The capacity of the systems is usually specified by the amount of data in megabytes or gigabytes that it can handle. Signals are either generated or encrypted and fed into the transmitter. These are relayed using wires or sent though dish antennas. The receiving units need to have a decoder that decrypts the signals and allows humans to view or listen. Most common examples are computer and telephone networks, Internet and Intranets, phone systems with speakers for multicast sessions, etc.
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