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     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 (BMCA) 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 Std 1588™-2008            
       A.10     PTP common header flags     
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    
Appendix I – Considerations on the use of transparent clock    
Appendix II – Considerations on the transmission of Delay_Req messages    
Appendix III – Considerations on the default PTP Ethernet multicast address    
Appendix IV – Considerations on the use of priority2    
Appendix V – Description of PTP clock states and associated contents of Announce messages    
        V.1     Purpose of the appendix         
        V.2     Description of the states          
        V.3     Example of mapping between PTP port states and PTP clock states for a 3-port T-BC   
        V.4     T-GM Announce message contents based on the internal PTP clock states      
        V.5     T-BC Announce message contents based on the internal PTP clock states