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Currently, the standard VDSL uses up to 4 different frequency bands, two for upstream (from the client to the telco) and two for downstream. The standard modulation technique is either QAM ( Quadrature amplitude modulation) or DMT ( Discrete multitone modulation) which are not compatible, but have similar performance. The current mostly used technology is QAM (the same technology used in cable modems).

The available bit rates ranges from about 26 Mbit/s symmetric for a loop of about 1500 m, up to 100 Mbit/s symmetric for a few hundred metres.

VDSL is capable of supporting high bandwidth applications such as HDTV. Qwest is currently prototyping the service and may offer a HDTV package as early as 1Q05.

1 Supply

As of 2004, the market is still small, most of it in South Korea.

• Australia
  • The sole VDSL supplier is TransACT , who use VDSL for Digital TV, Internet and WAN applications over their Fibre-To-The-Curb network. (VDSL is not ratified for use on Telstra supplied copper lines in Australia yet, and Telstra has publically voiced opposition to VDSL).
• Canada
  • VDSL is offered in urban areas by SaskTel in Saskatchewan, MTS in Manitoba, and Bell ExpressVu in Ontario and QuebecQuebec ( In Detail) ( In Detail) National Motto: Je me souviens (I remember CapitalLargest city Quebec City Montreal Area Total % fresh water 2nd largest(1st lgst prov. 1 542 056 km² 11,5% Population Total (2004) Density Ranked 2nd 7 509 928 5,43/km² Admi.
• FinlandSuomen TasavaltaRepubliken Finland ( In Detail) ( In Detail) National motto: None Official languages Finnish and Swedish Capital Helsinki President Tarja Halonen Prime minister Matti Vanhanen Area Total % water Ranked 64th 337,030 km² 9. 4% Population Tot
  • It's provided in OuluThis article is about the Finnish city; for other uses see Oulu (disambiguation). Oulu Uleaborg in Swedish) is a city and municipality of about 125,000 inhabitants in the province of Oulu and the region of Northern Ostrobothnia, in Finland. It is the larg by Finnet .
• Hong KongThe Hong Kong Special Administrative Region or Hong Kong (, pinyin: Xinggng, WG: Hsiang-kang, Cantonese IPA, Jyutping or Penkyamp: hoeng1 gong2, meaning Fragrant Harbour , is one of two Special Administrative Regions (SARs) of the People's Republic of Chi
  • VDSL is offered by HGC.
• SwedenThe Kingdom of Sweden Konungariket Sverige in Swedish) is a Nordic country in Scandinavia, in Northern Europe. It is bordered by Norway on the west, Finland on the northeast, the Skagerrak and the Kattegat on the southwest, and the Baltic Sea and the Gulf
  • Bredbandsbolaget AB
• United StatesThe United States of America also referred to as the United States U. America ¹ or the States is a federal republic in central North America, stretching from the Atlantic in the east to the Pacific Ocean in the west. It shares land borders with Canada in
  • QwestQwest Communications International Inc. Qwest is pronounced "Quest") is a large telecommunications carrier serving 14 western U. states: Arizona, Colorado, Idaho, Iowa, Minnesota, Montana, Nebraska, New Mexico, North Dakota, Oregon, South Dakota, Utah, Wa is offering both internet and television services over VDSL in Denver, Colorado and Phoenix, Arizona.