Table of Contents - G.875 (2024) Amd. 1 (03/2026) -

1	Scope
2	References
3	Definitions
	3.1	Definitions from ITU-T G.8081
	3.2	Definitions from ITU-T G.709
4	Abbreviations and acronyms
5	Conventions
	5.1	Information modelling conventions
6	Overview of the information model
7	UML model class diagrams
	7.1	High-level overview
	7.2	OTU model fragment
	7.3	ODU model fragment
	7.4	FlexO model fragment
	7.5	OAM model fragment
	7.6	GCC model fragment
	7.7	Connection protection model fragment
8	OTN UML information model
Annex A – CBR CTP model overview
Annex B – Combined media and OTN non-intrusive monitoring model fragment overview
Annex C – Fine grain OTN (fgOTN) model overview
	C.1	Fine grain OTN (fgOTN) CTP and TTP model fragment
	C.2	Fine grain OTN (fgOTN) connectivity model fragment
Annex D – OTN legacy information model
	D.1	High-level overview
	D.2	OxS-O model fragment
	D.3	OCh model fragment
	D.4	OTU model fragment
	D.5	ODU model fragment
	D.6	FlexO model fragment
	D.7	NIM model fragment
	D.8	GCC model fragment
	D.9	Protection model fragment
	D.10	Performance monitoring (PM) model fragment
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Appendix I – Usage of the model for TCM and GCC
	I.1	TCM locations
	I.2	GCC access locations
	I.3	GCC access and TCM locations together
Bibliography