dsl and adsl and hdsl

hi

can any one tell me the difference between adsl , dsl and hdsl network

thanks

Hi,

This is what I found interesting on the net:

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DSL: Digital Subscriber Loop
ADSL: Asymmetric Digital Subscriber Loop
HDSL: High speed Digital Subscriber Loop


Note that ADSL and HDSL are both "DSL." The first character just serves as
an adjective.


HDSL is used by the telcos these days to replace T1 networks.


ADSL is being used primarily to provide Internet access to residences. The
"A" means that the "downlink" speed and the "uplink" speed are different.
ADSL almost always offers a higher speed from the net to the residence (i.e.
"downlink") than it does in the other direction. Most people are "getting"
much more from the net than they're "giving".


When you see the term "DSL," it's probably always correct to think of it as
being the same as ADSL, at least in terms of "residential usage."


You may also run across the term "VDSL". This is an even newer technology
which will boost the speed (over DSL) by, oh, a factor of 10 to 20.

****

DSL Digital Subscriber Line is the the technology in which voice is transmitted in digital form...

ADSL,VDSL,HDSL,SDSL are its variants..

A - asymmetric...inwhich download speed is greater than upload, preferable for
home users (80:20)

H - High bit rate variant

V - Very high bit rate variant

S - Symmetric where download speed and upload speed are the same (50:50)

thanks

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