CONTENTS

 1     Scope        
 2     References             
 3     Abbreviations and acronyms           
 4     Definitions
        4.1     Terms defined in this Recommendation          
 5     Conventions           
 6     Description of packet timing concepts         
        6.1     The nature of packet timing  
        6.2     Differences between packet-based and physical-layer timing systems  
        6.3     Classes of packet clocks         
        6.4     Two-way timing protocols     
        6.5     PDV measurement    
Appendix I – Definitions and properties of packet measurement metrics    
        I.1               Introduction      
        I.2               Definition of the time error sequence     
        I.3               Packet selection             
        I.4          PDV metrics