�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��� �