ITU-T G.9711 (2021) Cor. 2 (06/2023)

Table of Contents
1 Scope
2 References
3 Definitions
4 Abbreviations and acronyms
5 Reference models
5.1 System reference model
5.2 Application reference models
5.3 МTU protocol reference model
5.4 MTU functional model
5.5 L2+ queues and QoS channels reference model
5.6 INP system requirements
6 Profiles
6.1 Definition
6.2 Profile compliance
7 Transmission medium interface characteristics
7.1 Duplexing method
7.2 Frequency band
7.3 Power spectral density
8 Transport protocol specific transmission convergence (TPS‑TC) function
8.1 Functional reference model
8.2 Generic DTU format
8.3 Packet-based TPS-TC (PTM-TC)
8.4 Network timing reference (NTR)
8.5 Time‑of‑day (ToD)
9 Physical media specific transmission convergence (PMS‑TC) sub-layer
9.1 Functional reference model
9.2 DTU scrambler
9.3 DTU encoder
9.4 Interleaver
9.5 Data frame multiplexer
9.6 RMC and RRC
9.7 Acknowledgement
9.8 Retransmission function
10 Physical media dependent (PMD) function
10.1 PMD functional reference model
10.2 Symbol encoder
10.3 Precoder (downstream vectoring)
10.4 Modulation
10.5 PDX frame structure
10.6 Superframe structure
10.7 Dynamic time frequency operation (DTFO)
10.8 Alignment of transmissions in vectored group
11 Operation and maintenance (OAM)
11.1 OAM functional model
11.2 Management functions and procedures over eoc
11.3 OAM primitives
11.4 P2P OAM parameters
11.5 P2MP OAM parameters
12 Link activation methods and procedures
12.1 Overview
12.2 Special operations channel (SOC)
12.3 Initialization procedure
12.4 NT identification and authentication in P2MP operation
13 On‑line reconfiguration (OLR)
13.1 Overview
13.2 Eoc-based procedures
13.3 RMC-based procedures
13.4 Low power operation
13.5 DBR procedure
13.6 DCMU procedure
14 Electrical requirements
14.1 Balance
14.2 Differential port impedance
Annex A – Secure NT Identification and Authentication based on IEEE 802.1X
A.1 Scope
A.2 Abbreviations and acronyms
A.3 Introduction
A.4 References
A.5 Reference model
A.6 NT identification
A.7 NT Authentication
Annexes B and C
Annex D – Operation with dynamic time assignment
D.1 Scope
D.2 Definitions
D.3 Abbreviations and acronyms
Page
D.4 Reference model(s)
D.5 Dynamic time assignment (DTA)
D.6 Initialization messages
Annexes E to O
Annex P – Adaptation to the twisted pair medium
P.1 Scope
P.2 Definitions
P.3 Abbreviations and acronyms
P.4 Reference models
P.5 Profiles
Annex Q – Adaptation to the coaxial medium
Q.1 Scope
Q.2 Definitions
Q.3 Abbreviations and acronyms
Q.4 Reference models
Q.5 Profiles
Q.6 Discontinuous operation
Q.7 Requirements specific to FDX mode
Q.8 Adaptation to the coaxial cable medium
Annex R
Annex S – NT software upgrade
S.1 Scope
S.2 References
S.3 Reference model
S.4 Software image management process
S.5 Message set
S.6 Software upgrade (informative)
Annex T – Dynamic time assignment (DTA) – higher-layer control aspects
T.1 Scope
T.2 DTA control parameters
T.3 Coordination between the link state request and the DTA request
T.4 Diagnostics and monitoring of DTA
Annexes U to W
Annex X – Operation without multi-line coordination intended for a crosstalk-free environment
X.1 Scope
X.2 Definitions
X.3 Abbreviations and acronyms
X.4 Reference model(s)
X.5 Profiles
X.6 On-line reconfiguration
X.7 Initialization
X.8 Discontinuous operation
X.9 Requirements specific to FDX mode
X.10 Initialization messages
Annex Y – Upstream dynamic resource reports
Appendix I – Copper pair wiring topologies and reference loops
I.1 Wiring topologies
I.2 Reference loops
Appendix II – Coaxial cable wiring topologies and reference loops
II.1 Reference loops
II.2 Wire types
Appendix III – Example OLR use cases
III.1 Transmitter initiated gain adjustment (TIGA)
Bibliography

Recommendation ITU-T G.9711 specifies a multi-gigabit broadband access technology that exploits the existing infrastructure of wire-pairs and coaxial cable that were originally deployed for plain old telephone service (POTS) or television (TV) services.

This Recommendation supports transmission at an aggregate net data rate (the sum of upstream and downstream rates) up to approximately 8 Gbit/s (for full duplex (FDX) mode) and 4 Gbit/s (for time division duplexing (TDD) mode) on metallic wires, to provide capabilities supporting internet access with low transmission latency (such as cloud computing, advanced video service, cloudbased 360-degree virtual reality and 8K video services).