xDSL Digital Subscriber Line Technology (4)

• 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

• 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

Previous slide

Next slide

Back to first slide

View graphic version