1
Scope
2
References
3
Terms and definitions
3.1
Terms defined elsewhere
3.2
Terms defined in this Recommendation
4
Abbreviations and acronyms
5
Conventions
6
Functional architecture of optical transport networks
7
OTN digital layers
7.1
Optical channel data unit (ODU) layer network
7.2
Optical channel transport unit (OTU) layer network
7.3
Client/server associations
8
OTN optical entities
8.1
Optical channel (OCh) layer network
8.2
Optical multiplex section (OMS)
8.3
Optical transmission section (OTS)
8.4
Media entities
8.5
Client/server associations
9
OTN topology
9.1
Unidirectional and bidirectional connections
9.2
Point-to-multipoint media channels
10
OTN management
10.1
Generic requirements
10.2
OTN network management requirements
10.3 Connection
supervision techniques
10.4 Connection
supervision applications
11 OTN
survivability techniques
11.1 Protection
techniques
11.2
Network restoration
12
Subdividing of the OTN
12.1
Domains using the black link approach
Appendix I – Examples of multi-domain OTN applications
Appendix II – Construction of optical channel connections
Appendix III – An example of the use of the black link approach
Appendix IV – Relationship between Recommendations ITU-T G.872 and ITU-T
G.798