UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

ITU-T G.993.2

Very high speed digital subscriber line transceivers 2 (VDSL2)

inactive
Buy Now
Organization: ITU-T
Publication Date: 1 December 2011
Status: inactive
Page Count: 376
scope:

This Recommendation is an enhancement to [ITU-T G.993.1] that supports transmission at a bidirectional net data rate (the sum of upstream and downstream rates) up to 200 Mbit/s on twisted pairs. This Recommendation is an access technology that exploits the existing infrastructure of copper wires that were originally deployed for POTS (plain old telephone service).

This Recommendation specifies only discrete multi-tone (DMT) modulation and incorporates components from [ITU-T G.993.1] (VDSL), [ITU-T G.992.3] (ADSL2), and [ITU-T G.992.5] (ADSL2 plus).

Whilst POTS uses approximately the lowest 4 kHz and ADSL uses approximately 2 MHz of the copper wire spectrum, this Recommendation is defined to allow the use of up to 30 MHz of the spectrum. This Recommendation can be deployed from central offices, from fibre-fed cabinets located near the customer premises, or within buildings.

The availability of bandwidth up to 30 MHz allows ITU-T G.993.2 transceivers to provide reliable high data rate operation on short loops. Without the use of the US0 band, this Recommendation should operate reliably over loop lengths that are similar to those of [ITU-T G.993.1], or slightly longer lengths due to the mandatory support of trellis coding. The addition of the US0 band and means to train echo cancellers and time-domain equalizers (TEQs) also allows this Recommendation to provide reliable operation on loops up to approximately 2 500 metres of 26 AWG (0.4 mm).

This Recommendation defines a wide range of settings for various parameters (such as bandwidth and transmitter power) that could potentially be supported by a transceiver. Therefore, this Recommendation specifies profiles to allow transceivers to support a subset of the allowed settings and still be compliant with the Recommendation. The specification of multiple profiles allows vendors to limit implementation complexity and develop implementations that target specific service requirements. Some profiles are better suited for asymmetric data rate services, whereas other profiles are better for symmetric data rate services.

The annexes of this Recommendation include band plans and power spectral density (PSD) masks that address region-specific requirements.

Document History

February 1, 2019
Very high speed digital subscriber line transceivers 2 (VDSL2)
This Recommendation is an enhancement to [ITU-T G.993.1] that supports transmission at a bidirectional net data rate (the sum of upstream and downstream rates) up to 200 Mbit/s on twisted pairs. This...
May 1, 2018
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 4
A description is not available for this item.
February 1, 2018
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 3
A description is not available for this item.
November 1, 2016
Very high speed digital subscriber line transceivers 2 (VDSL2) Corrigendum 1
A description is not available for this item.
March 1, 2016
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 2
A description is not available for this item.
January 1, 2015
Very high speed digital subscriber line transceivers 2 (VDSL2)
This Recommendation is an enhancement to [ITU-T G.993.1] that supports transmission at a bidirectional net data rate (the sum of upstream and downstream rates) up to 200 Mbit/s on twisted pairs. This...
January 1, 2014
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 5: Short reach VDSL2 with reduced power and enhanced data rate
A description is not available for this item.
August 1, 2013
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 4 – European limit PSD mask B8-18 for band plan 998E17
A description is not available for this item.
April 1, 2013
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 3
A description is not available for this item.
December 1, 2012
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 2
A description is not available for this item.
September 28, 2012
Very high speed digital subscriber line transceivers 2 (VDSL2)
A description is not available for this item.
June 1, 2012
Very high speed digital subscriber line transceivers 2 (VDSL2) Corrigendum 1
A description is not available for this item.
ITU-T G.993.2
December 1, 2011
Very high speed digital subscriber line transceivers 2 (VDSL2)
This Recommendation is an enhancement to [ITU-T G.993.1] that supports transmission at a bidirectional net data rate (the sum of upstream and downstream rates) up to 200 Mbit/s on twisted pairs. This...
June 1, 2011
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 7
A description is not available for this item.
April 1, 2011
Very high speed digital subscriber line transceivers 2 (VDSL2) Corrigendum 4
A description is not available for this item.
April 1, 2010
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 5: Enhanced handling of noise and other improvements
A description is not available for this item.
June 1, 2009
Very high speed digital subscriber line transceivers 2 (VDSL2) Corrigendum 3
A description is not available for this item.
February 1, 2008
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 2
A description is not available for this item.
April 1, 2007
Very high speed digital subscriber line transceivers 2 (VDSL2) Amendment 1
A description is not available for this item.
December 1, 2006
Very high speed digital subscriber line transceivers 2 (VDSL2) Corrigendum 1
A description is not available for this item.
February 1, 2006
Very high speed digital subscriber line transceivers 2 (VDSL2)
A description is not available for this item.

References

Advertisement