Recommendation ITU-T G.996.2 specifies line testing for xDSL transceivers in the form of single-ended line testing (SELT), dual-ended line testing (DELT) and metallic line testing (MELT). This version of this Recommendation integrates all the previous amendments and corrigenda with the 2009 version of Recommendation ITU-T G.996.2. This version of Recommendation ITU-T G.996.2 corrects or adds the following functionality:
– Amendment 2 provides updates to Annexes E and F, defining revised new measurement parameters for a MELT-PMD and a MELT-P.
– Amendment 3 updates Annex E defining accuracy values for MELT-PMD and MELT-P (new functionality).
– Amendment 4 updates Annex E on the accuracy values for multi-component 4-element resistance and 3-element capacitance parameters in MELT-PMD and on a definition on dealing with the xDSL input capacitance during measurements.
– Amendment 5 provides updates to Annexes A and B, defining SELT operating in conjunction with ITU-T G.9701 transceivers.
– Amendment 6 updates Annexes A, E, and F, defining the following new functionalities: SELT-PMD management, MELT-PMD management, report of negative capacitance values, pair identification tone with timeout, report of reliability indicator for measurements, report of time stamp, parallelism and polarity of far-end signature detection, and CPE identification capacitive.
– Corrigendum 1 fixes a number of inconsistencies.
– Fixes inconsistencies regarding accuracy requirements for MELT test voltages.