1 Scope
2 References
3 Terms and definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations
5 Conventions
6 Optical transport network interface structure
6.1 Basic signal structure
6.2 Information structure for the OTN interfaces
7 Multiplexing/mapping principles and bit rates
7.1 Mapping
7.2 Wavelength division multiplex
7.3 Bit rates and capacity
7.4 ODUk time‑division multiplex
8 Optical transport module (OTM‑n.m, OTM‑nr.m, OTM‑0.m,
OTM-0.mvn)
8.1 OTM with reduced functionality (OTM‑0.m, OTM‑nr.m,
OTM-0.mvn)
8.2 OTM with full functionality (OTM‑n.m)
9 Physical specification of the ONNI
9.1 OTM‑0.m
9.2 OTM‑nr.m
9.3 OTM‑n.m
9.4 OTM-0.mvn
10 Optical channel (OCh)
10.1 OCh with full functionality (OCh)
10.2 OCh with reduced functionality (OChr)
11 Optical channel transport unit (OTU)
11.1 OTUk frame structure
11.2 Scrambling
12 Optical channel data unit (ODUk)
12.1 ODUk frame structure
12.2 ODUk bit rates and bit rate tolerances
13 Optical channel payload unit (OPUk)
14 OTM overhead signal (OOS)
15 Overhead description
15.1 Types of overhead
15.2 Trail trace identifier and access point identifier definition
15.3 OTS OH description
15.4 OMS OH description
15.5 OCh OH description
15.6 OTUk/ODUk frame alignment OH description
15.7 OTUk OH description
15.8 ODUk OH description
15.9 OPUk OH description
16 Maintenance signals
16.1 OTS maintenance signals
16.2 OMS maintenance signals
16.3 OCh maintenance signals
16.4 OTUk maintenance signals
16.5 ODUk maintenance signals
16.6 Client maintenance signal
17 Mapping of client signals
17.1 OPUk client signal fail (CSF)
17.2 Mapping of CBR2G5, CBR10G, CBR10G3 and CBR40G signals into OPUk
17.3 Mapping of ATM cell stream into OPUk (k=0,1,2,3)
17.4 Mapping of GFP frames into OPUk
17.5 Mapping of test signal into OPUk
17.6 Mapping of a non-specific client bit stream into OPUk
17.7 Mapping of other constant bit-rate signals with justification
into OPUk
17.8 Mapping a 1000BASE-X and FC-1200 signal via timing transparent
transcoding into OPUk
17.9 Mapping a supra-2.488 CBR Gbit/s signal into OPUflex
18 Concatenation
18.1 Virtual concatenation of OPUk
18.2 Mapping of client signals
18.3 LCAS for virtual concatenation
19 Mapping ODUj signals into the ODTU signal and the ODTU into the HO OPUk
tributary slots
19.1 OPUk tributary slot definition
19.2 ODTU definition
19.3 Multiplexing ODTU signals into the OPUk
19.4 OPUk multiplex overhead and ODTU justification overhead
19.5 Mapping ODUj into ODTUjk
19.6 Mapping of ODUj into ODTUk.ts
Annex A – Forward error correction using 16-byte interleaved RS(255,239)
codecs
Page
Annex B – Adapting 64B/66B encoded clients via transcoding into 513B code
blocks
B.1 Transmission order
B.2 Client frame recovery
B.3 Transcoding from 66B blocks to 513B blocks
B.4 Link fault signalling
Annex C – Adaptation of OTU3 and OTU4 over multichannel parallel interfaces
Annex D – Generic mapping procedure principles
D.1 Basic principle
D.2 Applying GMP in OTN
D.3 Cm(t) encoding and decoding
D.4 SCnD(t)
encoding and decoding
Appendix I – Range of stuff ratios for asynchronous mappings of CBR2G5, CBR10G,
and CBR40G clients with ±20 ppm
bit-rate tolerance into OPUk, and for asynchronous multiplexing of ODUj into
ODUk (k > j)
Appendix II – Examples of functionally standardized OTU frame structures
Appendix III – Example of ODUk multiplexing
Appendix IV – Example of fixed stuff in OPUk with multiplex of lower‑order
ODUk signals
Appendix V
Appendix VI – ODUk multiplex structure identifier (MSI) examples
Appendix VII – Adaptation of parallel 64B/66B encoded clients
VII.1 Introduction
VII.2 Clients signal format
VII.3 Client frame recovery
VII.4 Additions to Annex B transcoding for parallel 64B/66B clients
Appendix VIII – Improved robustness for mapping of 40GBASE-R into OPU3 using
1027B code blocks
VIII.1 Introduction
VIII.2 513B code block framing and flag bit protection
VIII.3 66B block sequence check
Appendix IX – Parallel logic implementation of the CRC-8 and CRC-5
Appendix X – OTL4.10 structure
Appendix XI – CPRI into LO ODU mapping
Appendix XII – Overview of CBR clients into LO OPU mapping types
Bibliography