CONTENTS

1)     Scope 
2)     References 
3)     Conventions     
4)     Changes to ITU-T Rec. G.8031/Y.1342 
5)     Changes to clause 4, Abbreviations          
6)     Changes to clause 6, Introduction
7)     Changes to clause 7, Requirements          
8)     Changes to clause 10, Protection architectures     
9)     Changes to clause 11, APS Protocol       
10)     Changes to Annex A, State transition tables of protection switching        
11)     Changes to Appendix I, Operation example of 1-phase APS protocol