concentrator

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concentrator

[′kän·sən‚trād·ər]
(electronics)
Buffer switch (analog or digital) which reduces the number of trunks required.
(engineering)
An apparatus used to concentrate materials.
A plant where materials are concentrated.

concentrator

(communications)
A device that combines the data streams from many simultaneously active inputs into one shared channel in such a way that the streams can be separated after transmission. The concentrator's output bandwidth must be at least as great as the total bandwidth of all simultaneously active inputs. A concentrator is one kind of multiplexing device.

For example, a concentrator may be used to connect 24 2400 bps TTYs to a host via a 57600 bps channel.

concentrator

A device that combines several communications channels into one. It is often used to tie multiple terminals together into one line. It differs from a multiplexor, which also combines several lines into one, because the total bandwidth of a concentrator's inputs is not equal to its outputs. A concentrator may temporarily store data to allow for this discrepancy, whereas a multiplexor does not.

An Ethernet hub, which is a multiport repeater, is sometimes called a "concentrator."
References in periodicals archive ?
The access concentrator allows the service provider to divide the bandwidth of a T3 line among several customers, which reduces wasted bandwidth and improves overall network efficiency.
PETAH TIKVA, Israel -- ECI Telecom (NASDAQ: ECIL) today announced that according to the latest Dell'Oro Group report, ECI is ranked the #2 vendor worldwide for Multiservice Access Concentrators based on shipments in Q3 2005.
Thus, the access concentrator model represents a cost-effective solution to the service providers, to the MTU property owners, and to their tenants.
With this project Lucent increases its share of broadband access concentrators in the Telefonica network to reach a total of 400,000 ADSL ports.
Lucent Stinger(R) concentrators are part of Lucent's unique "triple play" offer, which includes the Lucent Stinger(R) Digital Subscriber Line Access Concentrator and supporting IP (Internet Protocol) services, Riverstone Ethernet gear, Juniper network routers, Lucent Ethernet over Sonet/SDH and optical transport solutions, and Lucent Worldwide Services.
The LE-54v(TM) Access Portal and LE-311v(TM) Access Concentrator give carriers the power to extend the services and capabilities of an MPLS core network directly to its business and residential subscribers.
The complete Paradyne solution enables Telekom Serbia to aggregate massive deployments of frame relay traffic from SHDSL endpoints through Paradyne's Broadband Access Concentrators with single uplink to one STM-1 port in the provider's ATM backbone network.
Paradyne's high-density Broadband Access Concentrator supports up to 2,592 ports per 7 foot rack.
Paradyne, (Nasdaq:PDYN), a leading provider of broadband voice, data and video network access solutions, today announced that BaneTele has selected its Broadband Access Concentrator for deployment of IP-based broadband services, including the latest in ADSL and SHDSL, as well as traditional Time Division Multiplexing (TDM) business-class services.
Devlin said that telephone companies around the world could now offer high quality video services over their existing telephone wires using the mPhase TV+ solution that integrates the Lucent Stinger DSL Access Concentrator as a concentrator and the SkyStream Networks Mediaplex head end platform.
Telefonica can also use the ports for ADSL 2+, which is the second-generation ADSL technology, a state-of-the-art technology and part of the Stinger(R) DSL Access Concentrator family of broadband solutions produced in Brazil.
Since July 2002 Lucent has been supplying TP with solutions from its Stinger(R) digital subscriber line (DSL) access concentrator family, CellPipe(R) customer premise equipment (CPE) subscriber devices and Lucent's NavisAccess(TM) DSL Management System.