Global - Broadband - xDSL - Technology

Synopsis

Digital Subscriber Line has various forms, but the most commonly used at present is the asymmetrical version (ADSL), allowing transmission speeds of up to 8Mb/s downstream and 640Kb/s upstream. The advantage of DSL over other broadband systems is that it uses existing twisted copper wires as the transmission medium. The nature, strengths and weaknesses of each of the DSL variants is described in this report, together with a discussion of the associated standards.

Table of Contents

  • 1. Synopsis
  • 2. Common characteristics of xDSL
  • 3. ADSL
  • 4. xDSL technology and terminology
    • 4.1 Comparing ADSL and HFC
  • 5. VDSL
  • 6. VoDSL – Voice over DSL
  • 7. Standards
    • 7.1 DSL Forum
    • 7.2 Universal ADSL Working Group
    • 7.3 G.Lite
    • 7.4 Multi-Megabit/s network access standard
    • Exhibit 1 – SDSL and ADSL compared
    • Exhibit 2 – xDSL Technology and Terminology
    • Exhibit 3 – Comparison of ADSL and HFC systems
    • Exhibit 4 – The Universal ADSL Working Group (UAWG) – 2000

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Licence Information

Focus Report Profile

Technologies

Broadband Fixed
Mobile & Wireless Broadband and Media

Number of pages 7

Status Archived

Last updated 10 Apr 2002
Update History

Analyst: Kylie Wansink

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