Data concentrators can be divided into passive concentrators, active concentrators and smart concentrators.
Passive concentrator
Passive Concentrator: Only responsible for the multi-media together, do not signal any treatment (strictly speaking, the passive concentrator is not a transponder, just a simple concentrator);
Active concentrator
Active concentrator: with the signal regeneration, amplification, which can expand the length of the media;
Smart concentrator
Intelligent Concentrator: Some functions of the network can be integrated in the concentrator, such as the network management function, select the transmission function, exchange function, segmentation function.
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