ADSL and VDSL. What are these technologies Speeds and restrictions Who supports VDSL Where will...

ADSL and VDSL

•What are these technologies

•Speeds and restrictions

•Who supports VDSL

•Where will these technologies be used

•What is the future of ADSL and VDSL

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

Network Structure Of ADSL

VDSL

• Symmetric as well as Asymmetric Transmissions

• Speed: Download: 13 Mbps – 55 MbpsUpload: 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 ONU’s, (Optical Network Unit)

Network Structure of VDSL to Residents

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

Where ADSL is used• Small to Medium Businesses • Residential • In the last six months there have been 6.8

million new subscribers worldwide

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

• 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 Japan’s Keio

Plaza Intercontinental Hotel

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.