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concentrator An obsolete term for a communication device that combines input lines whose total bandwidth is higher than that of the output line; the process is known as concentrating or concentration. A concentrator is used when the actual traffic of each of the input lines is below its potential traffic. It is possible for the concentrator to become overloaded and to lose data. A common method used by concentrators to combine (multiplex) the input lines is asynchronous time division multiplexing. The function of the concentrator has largely been superseded by network technology. See also communication processor, router.
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