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     PTP modes       
        6.4     PTP mapping    
        6.5     Message rates
        6.6     Unicast message negotiation     
        6.7     Alternate BMCA, telecom slave model and master selection process            
        6.8     Phase/time traceability information         
        6.9     Use of alternate master flag       
 7     ITU-T PTP profile for phase/time distribution with partial timing support from the network    
 8     Security aspects        
Annex A – ITU-T PTP profile for time distribution with partial timing support from the network (unicast mode)    
        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     Configuration management options         
        A.7     Clock identity format    
        A.8     Security aspects             
        A.9     Other optional features of IEEE 1588       
       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 on a PTP clock    
Annex D – TLV for PTP interface rate (optional)    
Annex E – Synchronization uncertain indication (optional)    
Appendix I – Considerations on the use of priority2    
Appendix II – Considerations on a T-TSC-A or T-TSC-P connected to an end application