CONTENTS

 1 Scope 
2 References 
3 Definitions  
        3.1 Definitions defined elsewhere         
        3.2     Terms defined in this Recommendation       
4 Abbreviations and acronyms        
5 Requirements    
6 Principles   
7 Mechanisms     
        7.1 Unidirectional protection switching 
        7.2 Mechanisms of bidirectional protection switching    
8 Security aspects
Appendix I – Example of protection capacity sharing for shared mesh protection switching     
Appendix II – Packet 1+1 example realization     
       II.1 Dual-feed and select mechanism     
       II.2 Analysis of the packet 1+1 scheme 
Bibliography