1、Union internationale des tlcommunications Place des Nations 1211 GENEVE 20 Suisse Switzerland Suiza COVERING NOTE GENERAL SECRETARIAT OF THE INTERNATIONAL TELECOMMUNICATION UNION Geneva, 4 July 2016 ITU TELECOMMUNICATION STANDARDIZATION SECTOR Subject: Erratum 1 (07/2016) to Recommendation ITU-T G.9
2、701 (2014), Fast access to subscriber terminals (G.fast) - Physical layer specification 1) Clause 12.3.4.2.7, O PMD Four bits are missing from the description for Field 8. Correct the last two sentences of the description for Field 8 to read: Field 8: “upstream gi table“ Each two gi values of subcar
3、riers 2i and 2i+1 shall be mapped onto a 24-bit field as follows: g2iMg2ig2ig2i g2ig2ig2ig2i g2ig2ig2ig2i g2i+1Mg2i+1g2i+1g2i+1 g2i+1g2i+1g2i+1g2i+1 g2i+1g2i+1g2i+1g2i+1, where g2iM and g2i+1M are the MSBs of the g2i and g2i+1 binary representations, respectively. If the NSCus is odd, the last 12 bi
4、ts are padded by 0. 2) Figure 7-1 In Figure 7-1, replace “ITU-T G.970 control parameters“ should read “ ITU-T G.9701 control parameters“. Replace Figure 7-1 with the following figure: 2 3) Figure 12-4 In Figure 12-4, the direction of the arrow is wrong on the o:_fast-retrain line. Replace Figure 12-4 with the following figure:
