1 Scope
2 References
3 Definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations
and acronyms
5 Conventions
5.1 Notational
5.2 Diagrammatic
6 Functional
architecture of OTN
7 OTN
digital layers
7.1 Optical data unit (ODU) layer network
7.2 Optical transport unit (OTU) layer network
7.3 Client/server associations
8 Architecture
of the media network supporting the OTN digital layers
8.1 Media constructs
8.2 Media element
8.3 Optical tributary signals (OTSi)
8.4 Management of optical signals
8.5 Management of media and signals
8.6 Modulator and termination functions
8.7 Client/server associations
9 Media
topology
10 Management
10.1 Capabilities
10.2 Connection supervision techniques
10.3 Connection supervision applications
11 OTN
survivability techniques
Appendix I – Relationship
between OCh and OTSi terminology
Appendix II – Use of the OTN to carry Flex Ethernet
II.1 Overview of Flex Ethernet
II.2 FlexE unaware
II.3 FlexE aware
II.4 FlexE terminating
Appendix III – Examples of views of an ODU layer
network
Appendix IV – Examples of multi‑domain OTN
applications
Bibliography