Post on 16-Jan-2016
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.