�1���
�Scope�
�2��� �References�
�3��� �Definitions��
������ �3.1��� �Terms defined elsewhere����
������ �3.2��� �Terms defined in this Recommendation�������
�4��� �Abbreviations and acronyms��������
�5��� �Conventions�����
�6��� �Packet network architectures�������
������ �6.1��� �Network layers and
synchronization�����������
������ �6.2��� �Layer network
performance impacts on synchronization������
�7��� �Timing flows�����
�8��� �Functional blocks�
�9��� �Next generation timing architectures���������
������ �9.1��� �Current synchronization based on SDH������
������ �9.2��� �Synchronization performance���������
������ �9.3��� �Network evolution�
������ �9.4��� �Next generation synchronization networks��
10��� �Frequency transfer using synchronous Ethernet����
����� �10.1��� �Synchronous Ethernet: General������
����� �10.2��� �Operation modes��
11��� �SSM for synchronous Ethernet����
����� �11.1��� �Packet-level SSM
����� �11.2��� �Sync selection based on SSM�������
����� �11.3��� �SSM for synchronous Ethernet: Format and protocol���������
����� �11.4��� �ESMC PDU extensions����
����� �11.5��� �Interworking with existing synchronization networks�����������
12��� �Synchronization management aspects������
Annex A � Reference source selection mechanism��� �
������ �A.1��� �Requirements��������
������ �A.2��� �Inputs����
������ �A.3��� �Internal oscillator���
������ �A.4��� �Internal physical
timing flows � Frequency ETY�����
������ �A.5��� �Selection mechanism���������
������ �A.6��� �Synchronization status
message selection���
����� �A.7 �����Hybrid equipment
selection function�����������
Appendix I � Examples of timing flows��� �
Appendix II � Functional models based on [ITU-T G.805] and
[ITU-T G.809]��� �
����� �II.1��� �Background�����������
����� �II.2��� �Application of [ITU-T
G.805] to the IWF��
����� �II.3��� �Timing information
transported over layer networks�
����� �II.4��� �Functional model of
Ethernet physical layer timing���
����� �II.5��� �Functional model for
differential and adaptive methods��������
Bibliography��� �