�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���� Introduction to telecommunication relay services���
������� 6.1���� General����������
������� 6.2���� Functional equivalency������������
������� 6.3���� Components of relay services
������� 6.4���� Consideration on international interworking/interoperability
for relay services
�7���� Four major types of relay services��
������� 7.1���� Text relay (text-to-speech relay)����������
������� 7.2���� Video relay (video-to-speech relay)����
������� 7.3���� Captioned telephony relay service������
������� 7.4���� Speech-to-speech relay�����������
�8���� Service requirements����������
������� 8.1���� End user equipment�
������� 8.2���� Call set-up, modification and tear down procedures���
������� 8.3���� Communication assistant��������
������� 8.4���� Point-to-point calling
������� 8.5���� Speed of answer���������
������� 8.6���� Emergency call handling����������
������� 8.7���� Message service, storage, indication and retrieval��������
������� 8.8���� Key performance indicators���
�9���� Service confidentiality and security
Appendix I � Use of IPTV for telephone relay service����
Appendix II � Real-time text in the United States����
Appendix III � Procedures for training of communication assistants����
����� III.1���� Initial training
����� III.2���� Instructional methods
����� III.3���� Training topics��������������
����� III.4���� Alternate language training topics��������
����� III.5���� Training class�
����� III.6���� Training transition and graduation�������
Appendix IV � Procedures for message retrieval����
Bibliography����