Table of Contents - G.808.4 (08/2024) - Linear protection for fine grain metro transport network (fgMTN) and fine grain optical transport network (fgOTN)

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	Protection architecture and characteristics
	6.1	Architecture class
	6.2	Architecture types
	6.3	Switching types
	6.4	Operation types
	6.5	Protection switching trigger
	6.6	Protection switching performance
7	Protection group commands
8	Automatic protection switching protocol
	8.1	Automatic protection switching � specific information format
	8.2	Principle of 1-phase APS operation
	8.3	Revertive mode
	8.4	Non-revertive mode
	8.5	Transmission and acceptance of APS protocol
	8.6	Request type
	8.7	Protection types
	8.8	Requested signal
	8.9	Bridged signal
	8.10	Control of bridge
	8.11	Control of selector
	8.12	Signal Fail of the protection transport entity
	8.13	Equal priority requests
	8.14	Command acceptance and retention
	8.15	Hold-off timer
	8.16	Wait-to-restore timer
	8.17	Exercise operation
	8.18	Failure of protocol defects
Appendix I � Operation examples of linear protection protocol for fgMTN and fgOTN
	I.1	1+1 unidirectional switching
	I.2	1+1 bidirectional switching