Table of Contents - G.8275.1/Y.1369.1 (2022) Amd. 2 (08/2024) -

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	Use of PTP for phase/time distribution
	6.1	High-level design requirements
	6.2	PTP modes and options
	6.3	Protection aspects and Alternate BTCA
	6.4	Phase/time and frequency traceability information
7	ITUT PTP profile for phase/time distribution with full timing support from the network
8	Security aspects
Annex A – ITUT PTP profile for phase/time distribution with full timing support from the network
	A.1	Profile identification
	A.2	PTP attribute values
	A.3	PTP options
	A.4	Best timeTransmitter clock algorithm options
	A.5	Path delay measurement option (delay request/delay response)
	A.6	Clock identity format
	A.7	Configuration management options
	A.8	Security aspects
	A.9	Other optional features of [IEEE 1588]
	A.10	PTP common header flags
	A.11	Profile version compatibility
	A.12	Other optional features used in this profile
Annex B – Options to establish the PTP topology with the Alternate BTCA
Annex C – Inclusion of an external phase/time input interface in a TBC
Annex D – Path trace (optional)
Annex E – Synchronization uncertain indication (optional)
Annex F – Use of stepsRemoved to limit reference chain (optional)
Annex G – Monitoring alternate timeTransmitter time information provided by a peer PTP port (optional)
	G.1	Use case 1 – PASSIVE port monitoring TIME_TRANSMITTER port
	G.2	Use case 2 – TIME_TRANSMITTER port monitoring PASSIVE port
	Page
	G.3	Use Case 3 – TIME_TRANSMITTER port monitoring TIME_TRANSMITTER port
Annex H – Transport of PTP over OTN
Annex I – Transport PTP over MTN
Annex J – Transport PTP over FlexE links
Annex K – Dynamic Monitoring based on PTSF (Optional)
Appendix I – Considerations on the use of transparent clock
Appendix II – Considerations on the transmission of Delay_Req messages
Appendix III – Considerations on the choice of the PTP Ethernet multicast destination address
Appendix IV – Considerations on the use of priority2
Appendix V – Description of PTP clock modes and associated contents of Announce messages
Appendix VI – Operations over link aggregation
Appendix VII – Relationship between clockClass and holdover specification
Appendix VIII – Considerations on a TTSC connected to an end application
Appendix IX – Calculation of offsetScaledLogVariance for TGM timed by PRTC or ePRTC
	IX.1	Observation interval and TDEV noise generation
	IX.2	Computation of PTP variance from TDEV
	IX.3	Computation of offsetScaledLogVariance from PTP variance
Appendix X – Description of a TBC extended clockClass application
	X.1	Purpose of TBC extended clockClass application
	X.2	DefaultDS data set member specifications under this extended application
Appendix XI – Considerations on native access equipment
Appendix XII – Monitoring alternate timeTransmitter time information provided by a peer PTP port
Appendix XIII – Considerations on the use of [IEEE 15882019]
Appendix XIV – Considerations in an environment of more than two PTP ports on a single PTP communication path when using transparent clocks and multicast addressing
Appendix XV – Considerations of deploying ePRTC and PRTC in the network
Appendix XVI – Considerations of using clockClass and priority2 in the synchronization network
Appendix XVII – Aspects of Ethernet switching and TBC functionality within a network element
Bibliography