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 BMCA
6.4 Phase/time traceability information
7 ITU-T PTP profile for phase/time distribution with full timing support
from the network
8 Security aspects
Annex A – ITU-T 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 master 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
Annex B – Options to establish the PTP topology with the Alternate BMCA
Annex C – Inclusion of an external phase/time input interface in a T-BC
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 master time information provided by a peer PTP
port (optional)
G.1 Use Case 1 – PASSIVE port monitoring MASTER port
G.2 Use Case 2 –MASTER port monitoring PASSIVE port
G.3 Use Case 3 –MASTER port monitoring MASTER 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 T-TSC connected to an end application
Appendix IX – Calculation of offsetScaledLogVariance for T-GM 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 T-BC extended clockClass application
X.1 Purpose of T-BC 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 master time information provided by a peer
PTP port
Appendix XIII – Considerations on the use of [IEEE 1588-2019]
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
Bibliography