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Digital Subscriber Line (DSL) Technologies

ADSL and SDSL are relatively new access technologies, based on the use of unused communications bandwidth in the wire "local loop" used to provide basic analog telephone service. DSL offers possible data rates from several hundred kbps up to the low Mbps range.
 
One difference between DSL services and other types is that, due to the way commercial access to telephone exchange DSL equipment is structured, ISPs can charge a single monthly fee including both "Basic Access" and Internet charges.
 
The system diagram looks like:
Structure of DSL hardware
Aspects of this will be discussed in the lecture.
 
Lecture 15: Internet Topology and Structure Copyright © 2004 P.Scott, La Trobe University Bendigo.



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