Basic HTML version of Foils prepared Dec. 6 98

Foil 37 xDSL - Digital Subscriber Line Technology (2)

From Introduction to Network WANs Lectures at Xi'an Jaotong University -- Sept 1998. by Roman Markowski
1 The key in xDSL technology is modulation, a process in which one signal modifies a properties of another.
2 Hardware: DSL requires modems and splitters for end-users; carriers use DSLAMs (digital subscriber line access multiplexers)
3 Differences between xDSL technologies: speed, operating distance, applications, ratio between up and downstream
4 Different approaches: ATM-based ADSL, ISDN DSL. The important thing is what is running over xDSL...
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