Vdsl2 Technology - Korenix JetCon 2502 User Manual

4-3. VDSL2 Technology

The VDSL (Very High Bit-rate Digital Subscriber Line) is a DSL technology
providing faster data transmission over a single flat untwisted or twisted pair of
copper wires. These fast speeds mean that VDSL is capable of supporting high
bandwidth applications such as HDTV, as well as telephone services (Voice over
IP) and general Internet access, over a single connection. VDSL is deployed over
existing wiring used for POTS (Plain Old Telephone Service) and lower-speed
DSL connections. This VDSL standard ITU G.993.1 was approved and released in
November 2001.
The VDSL2 is second generation of VDSL and standardized as ITU-T G.993.2 in
Feb, 2006. It is an access technology that exploits the existing infrastructure of
copper wiring network originally deployed for POTS services. It can be deployed
from central offices, from fiber-end cabinets that located near the customer
premises, or within buildings for the last mile access of FTTB (Fiber to the
building), FTTH (Fiber to the home) or FTTC (Fiber to the corner, cabinet).
The VDSL 2 technology is the newest and advanced technology that deploys on
the copper wires to support triple play services, such as voice, data, high
definition television (HDTV) and interactive games.
The VDSL 2 has defined 3 band planes- Annex A for North-American, Annex B for
Europe and Annex C for Japan. Band plan is defined as the following frequency
spectrum diagram.
Annex A, North American
Annex B, Europe, 997 symmetric band plan
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Annex B, Europe, 998 asymmetric band plan