ITU-T G.8273.3/Y.1368.3:2020

Summary
History
FOREWORD
Table of Contents
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 Physical layer frequency performance requirements
6.1 Synchronous equipment clock interfaces
6.2 Enhanced synchronous equipment clock interfaces
7 Packet layer performance requirements
7.1 Constant phase/time error and dynamic time error noise generation
7.1.1 Maximum absolute time error generation
7.1.2 Constant time error generation (cTE)
7.1.3 Dynamic time error low-pass filtered noise generation (dTEL)
7.1.4 Dynamic time error high-pass filtered noise generation (dTEH)
7.2 Noise tolerance
7.2.1 Noise tolerance for clock classes A and B
7.2.2 Noise tolerance for clock class C
7.3 Noise transfer
7.3.1 PTP to PTP noise transfer
7.3.2 Physical layer frequency to PTP noise transfer
7.4 Packet layer transient response and holdover performance
7.4.1 Transient response
7.4.1.1 PTP to PTP transient response
7.4.1.2 Physical layer frequency to PTP transient response
7.4.2 Holdover performance
8 Interfaces
8.1 Phase and time interfaces
8.2 Frequency interfaces
Annex A Telecom transparent clock functional model
Appendix I Traffic load test patterns
Appendix II Residence time
Appendix III Performance estimation for cascaded media converters acting as T-TCs
III.1 Noise generation
III.2 Noise tolerance
III.3 Noise transfer
III.4 Transient response and holdover performance

G.8273.3/Y.1368.3,G,8273.3/Y.1368.3This Recommendation specifies minimum requirements for time and phase synchronization devices used in synchronizing network equipment, which operates in the network architecture as defined in [ITU-T G.8271] and [ITU-T G.8275].