1 Scope
2 References
3 Terms and definitions
4 Abbreviations
5 Conventions
6 Optical transport network interface structure
6.1 Basic signal structure
6.1.1 OCh substructure
6.1.2 Full
functionality OTM‑n.m (n ≥ 1) structure
6.1.3 Reduced
functionality OTM‑nr.m and OTM‑0.m 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
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)
8.1.1 OTM‑0.m
8.1.2 OTM‑16r.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
15.1.1 Optical channel
payload unit overhead (OPUk OH)
15.1.2 Optical
channel data unit overhead (ODUk OH)
15.1.3 Optical channel
transport unit overhead (OTUk OH)
15.1.4 Optical channel
non-associated overhead (OCh OH)
15.1.5 Optical multiplex
section overhead (OMS OH)
15.1.6 Optical
transmission section overhead (OTS OH)
15.1.7 General
management communications overhead (COMMS OH)
15.2 Trail trace identifier and access point identifier definition
15.3 OTS OH description
15.3.1 OTS trail trace
identifier (TTI)
15.3.2 OTS backward
defect indication – Payload (BDI-P)
15.3.3 OTS backward
defect indication – Overhead (BDI-O)
15.3.4 OTS payload
missing indication (PMI)
15.4 OMS OH description
15.4.1 OMS forward
defect indication – Payload (FDI-P)
15.4.2 OMS forward
defect indication – Overhead (FDI-O)
15.4.3 OMS backward
defect indication – Payload (BDI-P)
15.4.4 OMS backward
defect indication – Overhead (BDI-O)
15.4.5 OMS payload
missing indication (PMI)
15.5 OCh OH description
15.5.1 OCh forward
defect indication – Payload (FDI-P)
15.5.2 OCh forward
defect indication – Overhead (FDI-O)
15.5.3 OCh open
connection indication (OCI)
15.6 OTUk/ODUk frame alignment OH description
15.6.1 OTUk/ODUk frame
alignment overhead location
15.6.2 OTUk/ODUk frame
alignment overhead definition
15.7 OTUk OH description
15.7.1 OTUk overhead
location
15.7.2 OTUk overhead
definition
15.7.3 OTUkV overhead
15.8 ODUk OH description
15.8.1 ODUk OH location
15.8.2 ODUk OH
definition
15.9 OPUk OH description
15.9.1 OPUk OH location
15.9.2 OPUk OH
definition
16 Maintenance signals
16.1 OTS maintenance signals
16.1.1 OTS payload
missing indication (OTS-PMI)
16.2 OMS
maintenance signals
16.2.1 OMS forward
defect indication – Payload (OMS-FDI-P)
16.2.2 OMS forward
defect indication – Overhead (OMS-FDI-O)
16.2.3 OMS payload
missing indication (OMS-PMI)
16.3 OCh maintenance signals
16.3.1 OCh forward
defect indication – Payload (OCh-FDI-P)
16.3.2 OCh forward
defect indication – Overhead (OCh-FDI-O)
16.3.3 OCh open
connection indication (OCh-OCI)
16.4 OTUk maintenance signals
16.4.1 OTUk alarm
indication signal (OTUk-AIS)
16.5 ODUk maintenance signals
16.5.1 ODUk alarm
indication signal (ODUk-AIS)
16.5.2 ODUk open
connection indication (ODUk-OCI)
16.5.3 ODUk locked
(ODUk-LCK)
16.6 Client
maintenance signal
16.6.1 Generic AIS for
constant bit rate signals
17 Mapping of client
signals
17.1 Mapping
of CBR2G5, CBR10G and CBR40G signals (e.g. STM-16/64/256) into OPUk
17.1.1 Mapping a CBR2G5
signal (e.g. STM-16) into OPU1
17.1.2 Mapping a CBR10G
signal (e.g. STM-64) into OPU2
17.1.3 Mapping a CBR40G
signal (e.g. STM-256) into OPU3
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
17.4.1 Mapping of a NULL
client into OPUk
17.4.2 Mapping of PRBS
test signal into OPUk
17.5 Mapping of a non-specific client bit stream into OPUk
17.5.1 Mapping bit
stream with octet timing into OPUk
17.5.2 Mapping bit
stream without octet timing into OPUk
17.6 Mapping of other constant bit-rate signals with justification into
OPUk
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
Appendix II – Examples of functionally standardized OTU
frame structures