CONTENTS

�1���� Scope�
�2���� References�
�3���� Definitions��
�4���� Abbreviations and acronyms��������
�5���� Conventions�����
�6���� TDM‑IP interworking������
�7���� General requirements�������
������� 7.1���� User plane requirements�����
������� 7.2���� Management plane aspects
������� 7.3���� Fault management aspects��
������� 7.4���� Traffic management aspects�����������
������� 7.5���� Connection admission control for the IWF��
�8���� Functional group considerations for TDM‑IP network interworking����������
������� 8.1���� IP����
������� 8.2��� �UDP
������� 8.3���� Common interworking indicators����
������� 8.4���� Optional timing information�
������� 8.5���� TDM payload��������
������� 8.6���� Summary of encapsulation format���
�9���� Payload formats
������� 9.1���� Structure-agnostic transport�����������
������� 9.2���� Structure-aware transport��
10���� Timing aspects�
11���� Packet loss aspects���������
12���� Support of CAS and CCS����������
������ 12.1���� Support of CAS���
������ 12.2���� Support of CCS���
13���� Security considerations���
Appendix I � Optional processing of HDLC-based CCS signals����
Appendix II � IP network performance metrics����
������ II.1���� Errors in the IP network that impact TDM service���
������ II.2���� Relationship to TDM service impairment metrics�����
������ II.3���� Availability requirements�����
������ II.4� ���Voice quality requirements��
Appendix III � Suggested payload sizes for structure-agnostic transport����
Appendix IV � Suggested number of AAL 1 SAR PDUs per packet���� �����