Table of Contents - G.8321 (2022) Amd. 2 (05/2025) -

1	Scope
2	References
3	Definitions
	3.1	Terms defined elsewhere
	3.2	Terms defined in this Recommendation
4	Abbreviations and acronyms
5	Conventions
6	Supervision
	6.1	Defects
	6.2	Consequent actions
	6.3	Defect correlations
	6.4	Performance filters
7	Information flow across reference points
8	MTN processes
	8.1	Processes for MTN Path layer and fgMTN path layer
	8.2	Processes for MTN Section layer
9	MTN path layer functions
	9.1	Connection functions
	9.2	Termination functions
	9.3	Adaptation functions
	9.4	Sublayer functions
10	MTN Section layer functions
	10.1	Connection functions
	10.2	Termination functions
	10.3	Adaptation functions
11	Media adaptation functions
	11.1	M-AI to MTNSy adaptation function (M-AI/MTNS_A, y = 0,1,2,4)
Annex A – Characteristics of fine grain metro transport network equipment functional blocks
	A.1	fgMTN path layer functions
	A.2	MTN path layer functions
Appendix I – Example state machine of MTN Path OAM Basic block alignment
Appendix II – BIP calculation under missing Basic block
Appendix III – fgMU error handling