Amendment 1 to Recommendation ITU-T G.709/Y.1331 (2012) contains extensions related to the:
- addition of FC-1600 client signal (clauses 15.9.2.1.1, 17.9 and 17.9.2)
- addition of a reference to G.7714.1's use of PM, TCM6 and SM TTI fields and GCC0, GCC1, and GCC2 fields for discovery application (clauses 2, 15.7.2.1.1, 15.7.2.2, 15.8.2.1.1, 15.8.2.2.1 and 15.8.2.3)
- addition of a reference to G.873.2 and G.7714.1’s allocation of the TCM6 field to monitor 3R'ed "optical paths (clauses 2, 15.8.2.2 and 15.8.2.2.6)
- addition of 3G-SDI information to Tables 7-9, 19-8, 19-9 and 19-10 (clauses 7.1, 19.6.1, 19.6.2 and 19.6.3)
- enhancement of the APS/PCC specification (clauses 2, 15.8.2.4)
- enhancement of the OTUk AIS Note (clause 16.4.1)
- addition of ODUflex(GFP) Cm and Cn values (clauses 19.6.1, 19.6.2, 19.6.3)
- extension of CPRI over OTN information (appendix VIII, Bibliography).