ITU-T G.9701 (2019) Cor. 4 (06/2023)

1 Scope
2 References
3 Definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Reference models and system requirements
5.1 System reference models
5.2 Application reference models
5.3 FTU protocol reference model
5.4 FTU functional model
5.5 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
7.4 Out-of-band PSD limit
7.5 Termination impedance
7.6 Maximum aggregate transmit power
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
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 TDD frame structure
10.6 Superframe structure
10.7 Normal and discontinuous operation intervals
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 OAM parameters
12 Link activation methods and procedures
12.1 Overview
12.2 Special operations channel (SOC)
12.3 Initialization procedure
12.4 Loop diagnostics mode
13 Online reconfiguration (OLR)
13.1 Overview
13.2 Eoc-based procedures
13.3 RMC-based procedures
13.4 Low power link states
14 Electrical requirements
14.1 Balance
14.2 Differential port impedance
Annex A to Annex C
Annex D – Operation with Dynamic Time Assignment in a crosstalk environment
D.1 Scope
D.2 Definitions
D.3 Abbreviations and acronyms
D.4 Reference model(s)
D.5 Coordinated Dynamic time assignment (cDTA)
D.6 Initialization messages
Annex E to Annex Q
Annex R – Showtime reconfiguration
R.1 Scope
R.2 Overview
Page
R.3 Showtime reconfiguration procedures
R.4 Management of the showtime reconfiguration protocol
R.5 Showtime reconfiguration request eoc commands
R.6 Near-end anomalies
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
Annex U
Annex V – Targeted generalized vectoring with non-active ITU-T G.9701 supporting lines (TGVN)
V.1 Scope
V.2 Definitions
V.3 Downstream TGVN (TGVNds)
V.4 Upstream TGVN (TGVNus)
V.5 Transceiver states and transceiver state diagram (amend clause 12.1.2)
V.6 Management of TGVN
Annex 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 Independent dynamic time assignment (iDTA)
X.7 Initialization messages
X.8 Discontinuous operation
X.9 On-line reconfiguration
X.10 Initialization
X.11 Low power states
X.12 Adaptation to the coaxial cable medium
Annex Y – Upstream dynamic resource reports
Annex Z – Cross-layer traffic monitoring functions and link state control
Z.0 Introduction
Z.1 Definition of Terms
Z.2 Abbreviations and acronyms
Z.3 Reference models
Z.4 Generic traffic monitoring functions
Z.5 Generic information flows
Z.6 Link state specific functions
Z.7 Link state management and reporting parameters
Appendix I – Wiring topologies and reference loops
I.1 Wiring topologies
I.2 Reference loops
Appendix II – Example OLR use cases
II.1 Transmitter initiated gain adjustment (TIGA)
Appendix III – Motivation of MTBE accelerated test
Appendix IV – Targeted generalized vectoring with active ITU-T G.9701 supporting lines (TGVA)
IV.1 Scope
IV.2 Definitions
IV.3 Downstream TGVA (TGVAds)
IV.4 Upstream TGVA (TGVAus)
Appendix V – Retransmission buffer size and the achievable bit-rate
V.1 Case 1: NSYMret+NSYMack+1 ≤ Mus
V.2 Case 2: NSYMret+NSYMack+1≥Mus
V.3 Case 3: Lower bound for the achievable net data rate
V.4 Memory size example
Appendix VI – Example applications of discontinuous operation
VI.1 Discontinuous operation with vectoring disabled
VI.2 Examples of discontinuous operation with vectoring enabled
Appendix VII – Calculation of loop attenuation (LATN)
VIII.1 Overview
VIII.2 Expected accuracy of impulse noise events
Appendix IX – Examples of the cDTA procedure
IX.1 Mds is increased
IX.2 Mds is decreased
Appendix X – Configuration parameters describing preferred net data rate
X.1 Scope
Page
X.2 Definitions
X.3 Abbreviations and acronyms
X.4 Preferred net data rate parameters
Bibliography

Recommendation ITU-T G.9701 specifies a gigabit broadband access technology that exploits the existing infrastructure of wire-pairs that were originally deployed for plain old telephone service (POTS) services.

This Recommendation specifies the operation of a broadband access technology that exploits the existing infrastructure of wire-pairs that were originally deployed for plain old telephone service (POTS) and, with Amendment 3, adds support for operation over coaxial cables.