Amendment 2 to Recommendation ITU-T G.997.1 (2012) covers the following functionalities: Addition of parameters to enable the vectoring modes. Addition of parameters for the data gathering functionality.
ITU-T G.997.1 AMD 2-2013 Referenced Document
ITU-T G.993.2-2011 Very high speed digital subscriber line transceivers 2 (VDSL2) (Study Group 15)
ITU-T G.997.1 AMD 2-2013 history
2013ITU-T G.997.1 AMD 2-2013 Physical layer management for digital subscriber line transceivers Amendment 2 (Study Group 15)