1
Scope
2 References
3 Terms and definitions
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)
8.1 OTM with reduced functionality
(OTM‑0.m, OTM‑nr.m)
8.2 OTM with full functionality (OTM‑n.m)
9 Physical specification of the ONNI
9.1 OTM‑0.m
9.2 OTM‑16r.m
9.3 OTM‑n.m
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
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 Mapping of CBR2G5, CBR10G and
CBR40G signals (e.g., STM-16/64/256) into OPUk
17.2 Mapping of ATM cell stream into
OPUk
17.3 Mapping of GFP frames into OPUk
17.4 Mapping of test signal into OPUk
17.5 Mapping of a non-specific client
bit stream into OPUk
17.6 Mapping of other constant bit-rate
signals with justification into OPUk
18 Concatenation
18.1 Virtual concatenation of OPUk
18.2 Mapping of client signals
18.3 LCAS for virtual concatenation
19 Mapping ODUk signals into the ODTUjk signal
19.1 OPUk Tributary Slot definition
19.2 ODTUjk definition
19.3 Multiplexing ODTUjk signals into
the OPUk
19.4 OPUk Multiplex Overhead
19.5 Mapping ODUj into ODTUjk
Annex A – Forward
error correction using 16-byte interleaved RS(255,239) codecs
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 – Range of
stuff ratios for asynchronous multiplexing of ODUj into ODUk (k > j)