Table of Contents

 1     Scope          
 2     References
 3     Definitions
 4     Abbreviations and acronyms             
 5     Conventions            
 6     The need for time and phase synchronization           
 7     Time and phase synchronization methods  
        7.1     Distributed PRTC         
        7.2     Packet based methods with timing support of intermediate nodes       
 8     Network reference model  
        8.1     Access section of HRM with PTP/native access IWF      
 9     Time and phase synchronization interfaces
Annex A – One pulse-per-second (1PPS) time and phase synchronization  interface specification    
        A.1     1PPS ITU-T V.11 interface       
        A.2     1PPS 50 W phase synchronization measurement interface       
Appendix I – Time and phase noise sources in time distribution chains    
        I.1     Noise introduced by a primary reference time clock (PRTC)       
        I.2     Noise introduced by a packet master clock function     
        I.3     Noise introduced by a packet slave clock function         
        I.4     Noise introduced by a telecom transparent clock           
        I.5     Noise introduced by a link        
        I.6     Derivation of delay asymmetry              
        I.7     Characteristics of the noise sources     
        I.8     Time error accumulation in a chain of clocks    
Appendix II – Time and phase end application synchronization requirements    
Appendix III – Asymmetry compensation for use of different wavelengths    
Appendix IV – Link and network asymmetry compensation    
Appendix V – Delay asymmetry resulting from interface rate change in PTP-unaware  network elements