�1���
�Scope�
�2��� �References�
�3��� �Definitions��
�4��� �Abbreviations and acronyms��������
�5��� �General aspects of ETS���
�6��� �ETS functional requirements���������
�7��� �Reference model��
�8��� �Interfaces and protocols in support of ETS�����������
�9��� �Call flows��� �