Table of Contents - G.798 (2023) Amd. 3 (07/2025) -
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 Supervision
6.1 Alarm reporting control
6.2 Defects
6.3 Consequent actions
6.4 Defect correlations
6.5 Performance filters
7 Information flow across reference points
8 Generic processes
8.1 Blank clause
8.2 Alignment processes
8.3 Signal quality supervision
8.4 Blank clause
8.5 Forward error correction (FEC) processing
8.6 Trail trace identifier (TTI) processing
8.7 Payload structure indication (PSI) acceptance processes
8.8 Status information (STAT) acceptance process
8.9 Maintenance signal generation and detection
8.10 Generic layer fault processing
8.11 OTSi modulator and demodulator processes
8.12 FlexO maintenance signal information (MAINT) acceptance process
8.13 FlexO instance signals interleaving processes
8.14 FlexOsec processing for encryption and authentication of fixed-length FlexO frame structures
9 OTS-O layer functions
9.1 Connection functions
9.2 Termination functions
9.3 Adaptation functions
10 OMS-O layer functions
10.1 Connection functions
10.2 Termination functions
10.3 Adaptation functions
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11 OSC (layer) functions
11.1 Connection functions
11.2 Termination functions
11.3 Adaptation functions
12 OTSiA and OCh (layer) functions
12.1 Connection functions
12.2 Termination functions
12.3 Adaptation functions
12.4 Sub-layer functions
13 OTU (layer) functions
13.1 Connection functions
13.2 Termination functions
13.3 Adaptation functions
13.4 Sub-layer functions
14 ODU (layer) functions
14.1 Connection functions
14.2 Termination functions
14.3 Adaptation functions
14.4 COMMS functions
14.5 Sub-layer functions
14.6 Blank clause
15 FlexO functions
15.1 Connection functions
15.2 Termination functions
15.3 Adaptation functions
15.4 Compound functions
16 OTSi adaptation functions
16.1 OTSi to OTUk or OTUk-RS adaptation function (OTSi/OTUk_A or OTSi/OTUk-RS_A)
16.2 OTSi to OTUkV adaptation function (OTSi/OTUkV_A)
16.3 OTSiG to OTUk adaptation function (OTSiG/OTUk_A)
16.4 OTSiG to OTUkV adaptation function (OTSiG/OTUkV_A)
16.5 OTSi to OTUCn adaptation function (OTSi/OTUCn_A)
16.6 OTSiG to OTUCn adaptation function (OTSiG/OTUCn_A)
16.7 OTSi to FlexO-x adaptation function (M-AI/FlexO-x_A)
16.8 OTSiG to FlexO-x adaptation function (OTSiG/FlexO-x_A)
16.9 OTSi to OSC adaptation function (OTSi/OSC_A)
16.10 OTSi to FlexOxR adaptation function (M-AI/FlexOxR_A)
16.11 OTSiG to FlexOxR adaptation function (M-AI/FlexOxR_A)
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17 Media element
18 FlexOnM (layer) functions
18.1 Connection functions
18.2 Termination functions
18.3 Adaptation functions
18.4 Layer processor functions
19 FlexOxR (layer) functions
19.1 Connection functions
19.2 Termination functions
19.3 Adaptation functions
Annex A Optical section (OSx) and constant bit rate (CBRx) layer functions
A.1 Connection functions
A.2 Termination functions
A.3 Adaptation functions
Annex B Generic FlexE and FlexO supervision and processes
B.1 Supervision
B.2 Generic processes
Annex C fine grain OTN (fgOTN) layer functions
C.1 fgODUflex Connection function (fgODUflex_C)
C.2 fgODUflexP trail termination functions (fgODUflexP_TT)
C.3 fgODUflex to client signals adaptation functions
C.4 fgODUflex tandem connection sub-layer (fgODUflexT) functions
C.5 ODUkP to fgODUflex adaptation function (ODUkP/fgODUflex_A)
Appendix I – Applications and functional diagrams
I.1 Transparent CBRx tributary interface port with optional SDH RS non-intrusive monitor on OTN equipment
I.2 OTU tributary interface port on OTN equipment
I.3 Selectable CBRx/OTUk tributary interface port on OTN equipment
I.4 OTU interface ports on non-OTN equipment
I.5 Multi-channel interface port with 3-R regeneration functionality for an ODUk connection function
Appendix II – Blank appendix
Appendix III – Performance of processes
III.1 Introduction
III.2 OTUk frame alignment process
III.3 STAT acceptance process and related defect detection
III.4 OTU dIAE, OTU dBDI, ODU dBDI detection
III.5 PT acceptance process and ODUPdPLM detection
III.6 Generic AIS and OTUk-AIS detection
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III.7 OTU and ODUT dBIAE detection process
Appendix IV – TTI processing examples
IV.1 Example 1
IV.2 Example 2
Appendix V – Blank appendix
Appendix VI – Blank appendix
Appendix VII – Examples of media elements
Appendix VIII – Trail protection of OTS-O/OMS-O layers in support of media layer protection
VIII.1 OxS-O trail protection sub-layer functions
Appendix IX – Examples of compound adaptation functions
Bibliography
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