Basic HTML version of Foils prepared Dec. 6 98

Foil 39 xDSL Digital Subscriber Line Technology (4)

From Introduction to Network WANs Lectures at Xi'an Jaotong University -- Sept 1998. by Roman Markowski
1 HDSL - High-speed Digital Subscriber Line
  • full-duplex, symmetric
    • 1.544 Mbps or 2.048 Mbps in each direction
  • two twisted pairs (for T1) and 3 pairs (for E1)
  • max distance 12,000 feet
2 VDSL - Very-high-bit-rate Digital Subscriber Line (known as BDSL)
  • asymmetric
    • downlink: 12.96-51.84 Mbps
    • uplink : 1.6 - 2.3 Mbps
  • max 4,500 - 1,000 feet
  • applications: High definition TV, multimedia
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