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