XDSL

Broadband Internet Glossary

Broadband Internet — xDSL

 

 

 

 

 

 

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Information on xDSL

DSL (digital subscriber line) allows broadband data services, such as broadband Internet access, to be carried on conventional copper pair telephone cables. The x is replaced by a letter that defines the specific type of DSL system.
     A xDSL system may be either "asymmetric" or "symmetric". An asymmetric xDSL system provides different uplink and downlink capacities; typically a much higher capacity is provided for the downlink than for the uplink. A symmetric xDSL system provides the same capacity for uplink and downlink.
     xDSL may be:

  • ADSL
  • HDSL
  • SDSL
  • VDSL

    •      In principle, an xDSL system using copper telephone cables can provide a data rate up to 2 Mbps at 4 km, increasing to approximately 10 Mbps over 2 km and 50 Mbps over very short ranges (perhaps 100m) . Practical systems mostly operate at much lower data rates, due to limitations in modulation and channel coding techniques.


    Other topics in our resources on Broadband Internet related to xDSL include: 
     
  • xDSL Broadband (x Digital Subscriber Line Broadband)
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