1) Changes to clause 1 "Scope"
2) Changes to clause 3 "Definitions"
3) Changes to clause 4 "Abbreviations and acronyms"
4) Changes to clause 6 "Optical extension schemes and
architectures"
5) New clause 6.4 "Wavelength conversion reach extenders"
6) New clause 6.5 "Wavelength re-conversion at OLT"
7) New clause 8.6 "WDM wavelength allocation plan for OTL"
8) New Appendix VI "Extender‑based type B protection
scheme"
9) New Appendix VII "Possible realization of OA and OEO‑based
extenders using wavelength conversion"
10) New Appendix VIII "Transport of BM‑to‑CM converted
signals over OTN"