Rate-Adaptive Digital Subscriber Line: Difference between revisions

Revision as of 11:48, 1 July 2009

Revision as of 19:22, 31 January 2010

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{{for|RE-ADSL2|ITU G.992.3 Annex L}}

'''{{DSL technologies}}'''

'''Rate-adaptiveAdaptive DSLDigital Subscriber Line''' ('''RADSL''') is a variation of [[ADSLAsymmetric Digital Subscriber Line]] (ADSL) technology. WithIn RADSL the [[DSL modem]] adjusts the [[upstream_(networking)|upstream]] speed[[Bandwidth of(signal theprocessing)|bandwidth]] connectionto (increate ana upstream/downstreamwider speedfrequency tradeoff)band depending uponfor the lengthdownstream andtraffic. quality ofUsing thethis line betweentechnique the [[DCE]]line (Telephoneis Exchange)more ortolerant [[DSLAM]]of anderrors thecaused by [[DTE]]Noise (Modemphysics),|noise]] inand an attempt to maintain a certain downstreamsignal speedloss.

When the modem connects using RADSL the [[upstream_(networking)|upstream]] [[Bandwidth (signal processing)|bandwidth]]<!-- disambiguated by interpreting as the frequency band itself is adjusted --> is adjusted to create a greater frequency band for the downstream traffic. Using this technique the line is more tolerant of errors caused by [[Noise (physics)|noise]] and signal loss.

As the frequency is adjusted, the upstream bandwidth may be markedly decreased if there is a large amount of line noise or signal degradation - this may reduce the upstream [[bit rate]] to as little as 64 kbit/s - the same speed as a single [[ISDN]] [[B channel]].

==See also==

* [[Digital subscriber line]] (DSL)

* [[Asymmetric Digital Subscriber Line]] (ADSL)

* [[Single-Pair High-speed Digital Subscriber Line]] (SHDSL)