ITU 993.2 VDSL 标准

International Telecommunication Union

ITU-T

Summary

from central offices, from fibre-fed cabinets located near the customer premises, or within buildings.

symmetric transmission at a bidirectional net data rate up to 200 Mbit/s on twisted pairs using a

1.0 ITU-T G.993.2 2006-02-17 15

1.1 ITU-T G.993.2 (2006) Cor. 1 2006-12-14 15

1.2 ITU-T G.993.2 (2006) Amd. 1 2007-04-06 15

1.4 ITU-T G.993.2 (2006) Cor. 2 2007-07-29 15

1.5 ITU-T G.993.2 (2006) Amd. 2 2008-02-06 15

1.6 ITU-T G.993.2 (2006) Amd. 3 2008-08-22 15

1.7 ITU-T G.993.2 (2006) Amd. 4 2009-01-13 15

1.8 ITU-T G.993.2 (2006) Cor. 3 2009-06-29 15

NOTE

mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the

Recommendation is achieved when all of these mandatory provisions are met. The words "shall" or some

INTELLECTUAL PROPERTY RIGHTS

ITU draws attention to the possibility that the practice or implementation of this Recommendation may

involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence,

TSB patent database at http://www.itu.int/ITU-T/ipr/.

Table of Contents

Page

1 Scope ............................................................................................................................ 1

2 References..................................................................................................................... 3

3 Definitions .................................................................................................................... 4

4 Abbreviations and acronyms ........................................................................................ 8

5 Reference models.......................................................................................................... 11

5.1 VTU functional model .................................................................................... 11

5.2 User plane protocol reference model .............................................................. 13