ADSL
       Asymmetric Digital Subscriber Line [technology] (BELLCORE, AT&T,
DSL, ADSL)

	

	ADSL
       Asymmetric Digital Subscriber Loop [modulation]

	

	Asymmetric Digital Subscriber Line
ADSL
Asymmetric Digital Subscriber Loop

    (ADSL, or Asymmetric Digital
   Subscriber Loop) A form of Digital Subscriber Line in which
   the bandwidth available for downstream connection is
   significantly larger then for upstream.  Although designed
   to minimise the effect of crosstalk between the upstream and
   downstream channels this setup is well suited for web
   browsing and client-server applications as well as for
   some emerging applications such as video on demand.

   The data-rate of ADSL strongly depends on the length and
   quality of the line connecting the end-user to the telephone
   company.  Typically the upstream data flow is between 16 and
   640 kilobits per second while the downstream data flow is
   between 1.5 and 9 megabits per second.  ADSL also provides a
   voice channel.

   ADSL can carry digital data, analog voice, and broadcast
   MPEG2 video in a variety of implementations to meet customer
   needs.

   ["Data Cooks, But Will Vendors Get Burned?", "Supercomm
   Spotlight On ADSL" & "Lucent Sells Paradine", Wilson & Carol,
   Inter@ctive Week Vol. 3 #13, p1 & 6, June 24 1996].

   See also Carrierless Amplitude/Phase Modulation, Discrete
   MultiTone.

   ADSL Forum (http://adsl.com/).

   (1998-05-18)