ADSL and VDSL

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ADSL and VDSL
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• What are these technologies
• Speeds and restrictions
• Who supports VDSL
• Where will these technologies be used
• What is the future of ADSL and VDSL

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ADSL

• Asymmetric speeds
• Speed Download 1.5 Mbps 6 Mbps
  Upload 16 640 kbps
• Uses the current copper infrastructure of the
  telephone network
• For best performance maximum distance of 18000
  feet from the CO
• Gives a designated line, in other words it is not
  a shared line

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Network Structure Of ADSL
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VDSL

• Symmetric as well as Asymmetric Transmissions
• Speed Download 13 Mbps 55 Mbps Upload 1.5
  Mbps 26 Mbps
• Uses Fiber Optic Cable Copper should not exceed
  4500 feet form the CO for optimum performance
• Will use FTTC with ONUs, (Optical Network Unit)

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Network Structure of VDSL to Residents
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Who is Who in VDSL

• There are two main groups that are trying to
  standardize VDSL
• VDSL Alliance made up of Alcatel and Texas
  Instruments DMT modulation techniques
• VDSL coalition who is made up of Lucent and
  Broadcom CAP and QAM modulation techniques

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Where ADSL is used

• Small to Medium Businesses
• Residential
• In the last six months there have been 6.8
  million new subscribers worldwide

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Where What can VDSL provide

• Competitors are aiming toward multi-tenanted
  apartments
• Large Businesses
• They even want to target rural areas as more
  people work from home require high speed access
• Video on demand
• Video conferencing and VoIP

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• Japan has set a target date of the mid century to
  have 30 million households connected to
  high-speed access
• They will do this with Nippon Electronics
  Company, NEC
• NEC believes in the technology of VDSL and has
  set out to prepare for future markets
• They have already have a pilot system in Japans
  Keio Plaza Intercontinental Hotel

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Conclusion

• ADSL and VDSL are like brothers
• high speed-access
• Telephone infrastructure
• VDSL has not reached a standard yet
• Japan as world Leaders in the telecommunication
  infrastructure
• Depending on your budget they have a place in
  residential and/or businesses sector.