Technology Implications
Having a concentrator near a subscriber's telephone results in very low signal degradation before the analog signal is digitized. This provides reliably good voice quality.
Concentrators are often colocated with a Digital Subscriber Line Access Multiplexer (DSLAM). This can provide access to Asymmetric Digital Subscriber Line (ADSL) Internet service for subscribers who are beyond the normal 4 kilometre signaling limit on a copper wire loop. For example, a fiber optic cable might run up to 30 kilometres without a repeater from the telephone exchange to a concentrator site, and local subscriber wire local loops can extend an additional 4 kilometres beyond the concentrator and its DSLAM. With repeaters in the fiber optic cable the distance from the telephone exchange can be extended much farther.
Read more about this topic: Remote Concentrator
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