ADSL—ASYMMETRIC DIGITAL SUBSCRIBER LINE
Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. It does this by utilizing frequencies that are not used by a voice telephone call. A splitter or micro filters allow a single telephone connection to be used for both ADSL service and voice calls at the same time. Because phone lines vary in quality and weren't initially provisioned with ADSL in mind, it can generally only be used over short distances, typically less than 5 km.
ADSL lines support up to 24mb/s downstream bit rate and 2mb/s upstream bit rate.
As discussed in previous chapter , ADSL is a part of DSLAM for data applications..with splitter a subscriber can use both data & telephone applications at a time.
to understand ADSL technology , please refer to following diagram ::
ADSL has 02 versions of applications ::
ADSL G.LITE :: downstream of 2mb/s
ADSL CLASSICAL :: downstream of 8 mb/s or more
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