http://www.dslforum.org/aboutdsl/adsl_tutorial.html

http://www.everythingdsl.com/whatis/

http://www.everythingdsl.com/howfast/

http://www.everythingdsl.com/faq/

http://www.dsllife.com/dsltut.htm

http://www.howstuffworks.com/dsl.htm

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