ADSLandVDSL-GEOCITIES.ws.pptVIP

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 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 ONU’s, (Optical Network Unit) 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 * What are these technologies Speeds and restrictions Who supports VDSL Where will these technologies be used What is the future of ADSL and VDSL Network Structure Of ADSL Network Structure of VDSL to Residents *