Summary - G.709.1 (2024) Amd. 1 (08/2024) -

Recommendation ITU-T G.709.1 specifies common elements and signal structures used by various types of flexible optical transport network (FlexO) interfaces.
Edition 3.0 removes short-reach interfaces which are moved to Recommendation ITU-T G.709.5. This Recommendation is renamed and focuses on common FlexO elements.
Amendment 1 to Recommendation ITU-T G.709.1 adds FlexO level deskewing functionality.