VDSL - ορισμός. Τι είναι το VDSL
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Τι (ποιος) είναι VDSL - ορισμός

DIGITAL SUBSCRIBER LINE TECHNOLOGIES
Very-high-bit-rate digital subscriber line 2; VDSL2; Very-high-bit-rate Digital Subscriber Line; VHDSL; Very-high-bit-rate Digital Subscriber Line 2; Very high data rate Digital Subscriber Line; G.993.2; G.993.1; Very High Speed Digital Subscriber Line; Very High Bitrate Digital Subscriber Line; Very High Speed Digital Subscriber Line 2; Very high bitrate digital subscriber line; ITU G.993.2; ITU G.993.1; Very-high-bitrate digital subscriber line; Very high bit rate digital subscriber line; Very high speed digital subscriber line 2; G.vector; G.993.5; Vdsl 2; Vdsl2; Vdsl; Vectoring; Vplus; Very-high-bit-rate digital subscriber line
  • A VDSL2 cabinet on top of a copper cabling cabinet in Italy.
  • SoC]]
  • UK VDSL]] cabinet
  • DSLAM]] Cabinet installed by [[PCCW]] in [[Pat Heung]], [[Hong Kong]].

VDSL         
Very high data / bit rate Digital Subscriber Line (Reference: DSL)
VDSL         
Very high-speed digital subscriber line (VDSL) and very high-speed digital subscriber line 2 (VDSL2) are digital subscriber line (DSL) technologies providing data transmission faster than the earlier standards of asymmetric digital subscriber line (ADSL) G.992.

Βικιπαίδεια

VDSL

Very high-speed digital subscriber line (VDSL) and very high-speed digital subscriber line 2 (VDSL2) are digital subscriber line (DSL) technologies providing data transmission faster than the earlier standards of asymmetric digital subscriber line (ADSL) G.992.1, G.992.3 (ADSL2) and G.992.5 (ADSL2+).

VDSL offers speeds of up to 52 Mbit/s downstream and 16 Mbit/s upstream, over a single twisted pair of copper wires using the frequency band from 25 kHz to 12 MHz. These rates mean that VDSL is capable of supporting applications such as high-definition television, as well as telephone services (voice over IP) and general Internet access, over a single connection. VDSL is deployed over existing wiring used for analog telephone service and lower-speed DSL connections. This standard was approved by the International Telecommunication Union (ITU) in November 2001.

Second-generation systems (VDSL2; ITU-T G.993.2 approved in February 2006) use frequencies of up to 30 MHz to provide data rates exceeding 100 Mbit/s simultaneously in both the upstream and downstream directions. The maximum available bit rate is achieved at a range of about 300 metres (980 ft); performance degrades as the local loop attenuation increases.

Παραδείγματα από το σώμα κειμένου για VDSL
1. The German regulator had wanted to exempt all services piped over VDSL–lines.
2. ADSL, VDSL and wireless all have the same basic pipeline and Vietnam needs local content and transmissions.
3. Matthias Kurth, Germany‘s chief regulator, informed Ms Reding in mid–October that VDSL technology was so new that no market for it yet existed in the country.
4. A spokesman for Viviane Reding, European telecoms commissioner, said: "We insist that the development of the VDSL market in Germany follows the EU rules and that the dominant player will not be given a head start in a monopoly." Other EU countries had agreed to regulate their VDSL markets, the Commission added.
5. The German regulator now has until early next year to persuade Brussels that its definition of the VDSL market is legitimate.