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Asymmetric digital subscriber line
ADSL technology is asymmetric. It allows more bandwidth
downstream -from an NSP's central office to customer site - than upstream
from the subscriber to the central office. This asymmetry, companied with
always-on access (which eliminates call setup), makes ADSL ideal for
Internet/intranet surfing, video- on -demand, and remote LAN access. Uses
of this application typically download much more information than they
send.
ADSL transmits more than 6 Mbps to a subscriber, and as much as 640Kbps
more in both directions. Such rate expands existing access capacity by a
factor of 50 or more with out new cabling. ADSL can literally transform
the existing public information network from one limited to voice, text,
and low-resolution graphics to a powerful, ubiquitous system capable of
bringing multimedia, including full motion video, to every home this
century.
ADSL will play a crucial role over the next decade or more as telephone
companies enter new markets for delivery information in video and
multimedia formats. New broadband cabling will take decades to reach all
prospective subscribers. Success of these new services will depend on
reaching as many subscribers as possible during the first few years. By
bringing movies, television, video catalogs, remote CD-ROMs, corporate
LANs and the internet into homes and small businesses, ADSL will makes
these markets viable and profitable for telephone company and application
suppliers.
Imagine yourself in a world where humans interact with computers. You are
sitting in front of your personal computer that can listen, talk, or even
scream aloud. It has the ability to gather information about you and
interact with you through special techniques like facial recognition,
speech recognition, etc. It can even understand your emotions at the touch
of the mouse. It verifies your identity, feels your presents, and starts
interacting with you .You ask the computer to dial to your friend at his
office. It realizes the urgency of the situation through the mouse, dials
your friend at his office, and establishes a connection.
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