Access Concentrator Definition

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A access concentrator is a device that connects a number of circuits, which are not all used at once, to a smaller group of circuits for economy.

In data transmission, a concentrator is a functional unit that permits a common path to handle more data sources than there are channels currently available within the path. A concentrator usually provides communication capability between many low-speed, usually asynchronous channels and one or more high-speed, usually synchronous channels. Usually different speeds, codes, and protocols can be accommodated on the low-speed side. The low-speed channels usually operate in contention and require buffering.

Also, remote access concentrators allow multiple ISDN and analog calls to come in over one port from the telephone company, allowing for higher call densities than remote access servers; they include dial-up protocols, authentication, and greater accessibility.

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