CONTENTS

 1     Scope 
 2     References 
 3     Definitions  
 4     Symbols and abbreviations           
 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 
Appendix III – Bibliography