Editing VDSL (section)

==VDSL standards==
[[File:Lantiq XWAY VRX288 V1.1.png|thumb|[[Digital subscriber line|DSL]] [[System on a chip|SoC]]]]
A VDSL connection uses up to seven frequency bands, so one can allocate the data rate between [[Upstream (networking)|upstream]] and [[Downstream (networking)|downstream]] differently depending on the service offering and spectrum regulations. The first-generation VDSL standard specified both [[quadrature amplitude modulation]] (QAM) and [[discrete multi-tone modulation]] (DMT). In 2006, ITU-T standardized VDSL in recommendation G.993.2 which specified only DMT modulation for VDSL2.

{| class="wikitable sortable"
! class="unsortable"|Version || class="unsortable"|Standard name || class="unsortable"|Common name || Downstream rate || Upstream rate || Approved on
|-
| VDSL || ITU G.993.1 || VDSL || 55 Mbit/s || 3 Mbit/s || 2001-11-29
|-
| VDSL2 || ITU G.993.2 || VDSL2 || 200 Mbit/s || 100 Mbit/s || 2006-02-17
|-
| VDSL2-Vplus || ITU G.993.2 <br />Amendment 1 (11/15)|| VDSL2 Annex Q<br />VPlus/35b || 300 Mbit/s || 100 Mbit/s || 2015-11-06
|}

[[File:VDSL2 frequencies.png]]