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 Optical transport network
interface structure
6.1 Basic signal
structure
6.2 Information
structure for 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 OTN Interfaces
8.1 Single-OTU (SOTU) interface
8.2 Multi-OTU (MOTU) interface
8.3 Single-OTU with
management (SOTUm) interface
8.4 Multi-OTU with
management (MOTUm) interface
9 Media Element
10 OCh and OTSiA
10.1 OCh
10.2 Optical tributary
signal assembly (OTSiA)
11 Optical transport unit
(OTU)
11.1 OTUk frame
structure
11.2 Scrambling
11.3 OTUCn frame
structure
12 Optical data unit (ODU)
12.1 ODU frame
structure
12.2 ODU bit rates and
bit-rate tolerances
13 Optical payload unit (OPU)
14 Overhead information
carried over the OSC and OCC
14.1 OSC
14.2 OCC
15 Overhead description
15.1 Types of overhead
15.2 Trail trace
identifier and access point identifier definition
15.3 OTS-O description
15.4 OMS-O description
15.5 OCh-O and OTSiG-O
description
15.6 OTU/ODU frame
alignment OH description
15.7 OTU OH description
15.8 ODU OH description
15.9 OPU OH description
16
Maintenance signals
16.1 OTS maintenance signals
16.2 OMS maintenance signals
16.3 OCh and OTiSA maintenance signals
16.4 OTU maintenance signals
16.5 ODU maintenance signals
16.6 Client maintenance signal
17 Mapping of client signals
17.1 OPU client signal
fail (CSF)
17.2 Mapping of CBR2G5,
CBR10G, CBR10G3 and CBR40G signals into OPUk
17.3 Blank clause
17.4 Mapping of GFP
frames into OPUk (k=0,1,2,3,4,flex)
17.5 Mapping of test
signal into OPU
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 Gbit/s CBR signal into OPUflex using BMP
17.10 Mapping of packet
client signals into OPUk
17.11 Mapping of FlexE
client signals into OPUflex using IMP
17.12 Mapping of FlexE
aware signals into OPUflex
17.13 Mapping a 64b/66b
PCS coded signal into OPUflex using BMP and 2-bit alignment of 66b code
words
18 Blank clause
19 Mapping ODUj signals into
the ODTU signal and the ODTU into the OPUk tributary slots
19.1 OPUk tributary
slot definition
19.2 ODTU definition
19.3 Multiplexing ODTU
signals into the OPUk
Page
19.4 OPUk multiplex overhead
and ODTU justification overhead
19.5 Mapping ODUj into
ODTUjk
19.6 Mapping of ODUj
into ODTUk.ts
20 Mapping ODUk signals into
the ODTUCn signal and the ODTUCn into the OPUCn tributary slots
20.1 OPUCn tributary
slot definition
20.2 ODTUCn definition
20.3 Multiplexing
ODTUCn signals into the OPUCn
20.4 OPUCn multiplex
overhead and ODTU justification overhead
20.5 Mapping ODUk into
ODTUCn.ts
Annex A – Forward error correction using 16-byte interleaved RS(255,239)
codecs
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
Annex E – Adaptation of parallel 64B/66B encoded clients
E.1 Introduction
E.2 Clients signal
format
E.3 Client frame
recovery
E.4 Additions to Annex
B transcoding for parallel 64B/66B clients
Annex F – Improved robustness for mapping of 40GBASE-R into OPU3 using
1027B code blocks
F.1 Introduction
F.2 513B code block
framing and flag bit protection
F.3 66B block sequence
check
Annex G – Mapping ODU0 into a low latency OTU0 (OTU0LL)
G.1 Introduction
G.2 Optical transport
unit 0 low latency (OTU0LL)
Annex H – OTUCn sub rates (OTUCn-M)
H.1 Introduction
H.2 OTUCn-M frame
format
Annex I
Annex J – Recovery of 64B/66B
encoded clients from parallel 256B/257B interfaces
Annex K – Transporting 200GbE and 400GbE am_sf<2:0> information
through a single optical link between two Ethernet/OTN transponder entities in
the OTN
K.1 Introduction
K.2 Client Degrade
Indication (CDI) overhead
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 – Blank appendix
Appendix V – ODUk multiplex structure identifier (MSI) examples
Appendix VI – Parallel logic implementation of the CRC-9, CRC-8, CRC-5
and CRC-6
Appendix VII – OTL4.10 structure
Appendix VIII – CPRI into ODU mapping
Appendix IX – Overview of CBR clients into OPU mapping types
Appendix X – Overview of ODUj into OPUk mapping types
Appendix XI – Derivation of recommended ODUflex(GFP) bit-rates and
examples of ODUflex(GFP) clock generation
XI.1 Introduction
XI.2 Tributary slot
sizes
XI.3 Example methods
for ODUflex(GFP) clock generation
Appendix XII – Terminology changes between ITU-T G.709 Edition 4 and
Edition 5
Appendix XIII – OTUCn sub rates (OTUCn-M) Applications
XIII.1 Introduction
XIII.2 OTUCn-M frame
format and rates
XIII.3 OTUCn-M fault condition
Bibliography