Telecommunications and exchange between information technology systems — Requirements for local and metropolitan area networks — Part 3: Standard for Ethernet — Amendment 5: Physical layers specifications and management parameters for 10 Mb/s operation and associated power delivery over a single balanced pair of conductors

Télécommunications et échange entre systèmes informatiques — Exigences pour les réseaux locaux et métropolitains — Partie 3: Norme pour Ethernet — Amendement 5: Spécifications des couches physiques et paramètres de gestion pour fonctionnement à 10 Mb/s et fourniture de puissance associée sur une paire symétrique unique de conducteurs

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Telecommunications and exchange
Secretariat: KATS
between information technology
Voting begins on:
2021-06-30 systems — Requirements for local and
metropolitan area networks —
Voting terminates on:
Part 3:
Standard for Ethernet
AMENDMENT 5: Physical layers
specifications and management
parameters for 10 Mb/s operation and
associated power delivery over a single
balanced pair of conductors
Télécommunications et échange entre systèmes informatiques —
Exigences pour les réseaux locaux et métropolitains —
Partie 3: Norme pour Ethernet
Reference number
ISO/IEC/IEEE 8802-3:2021/FDAM 5:2021(E)

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ISO/IEC/IEEE 8802-3:2021/FDAM 5:2021(E)

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ISO/IEC/IEEE 8802-3:2021/FDAM 5:2021(E)
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IEEE Std 802.3cg™-2019
(Amendment to IEEE Std 802.3™-2018
as amended by IEEE Std 802.3cb™-2018,
IEEE Std 802.3bt™-2018, IEEE Std 802.3cd™-2018,
and IEEE Std 802.3cn™-2019)
IEEE Standard for Ethernet
Amendment 5:
Physical Layer Specifications and
Management Parameters for
10 Mb/s Operation and
Associated Power Delivery over a
Single Balanced Pair of Conductors
Developed by the
LAN/MAN Standards Committee
of the
IEEE Computer Society
Approved 7 November 2019
IEEE SA Standards Board

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ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Abstract: This amendment to IEEE Std 802.3-2018 specifies additions and appropriate
modifications to add 10 Mb/s Physical Layer (PHY) specifications and management parameters
for operation, and associated optional provision of power, over a single balanced pair of
Keywords: 10BASE-T1L, 10BASE-T1S, amendment, copper, Ethernet, IEEE 802.3™,
IEEE 802.3cg™, MASTER-SLAVE, medium dependent interface, physical coding sublayer,
Physical Layer, Physical Layer Collision Avoidance, PLCA, physical medium attachment
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ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
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ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
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ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
The following individuals were officers and members of the IEEE 802.3 Working Group at the beginning of
the IEEE P802.3cg Working Group ballot.
David J. Law, IEEE 802.3 Working Group Chair
Adam Healey, IEEE 802.3 Working Group Vice-Chair
Pete Anslow, IEEE 802.3 Working Group Secretary
Steven B. Carlson, IEEE 802.3 Working Group Executive Secretary
Valerie Maguire, IEEE 802.3 Working Group Treasurer
George Zimmerman, IEEE P802.3cg 10 Mb/s Single-Pair Ethernet Task Force Chair
Valerie Maguire, IEEE P802.3cg 10 Mb/s Single-Pair Ethernet Task Force Editor-in-Chief
Gerrit den Besten
John Abbott Gergely Huszak
David Abramson Claudio DeSanti
Yasuhiro Hyakutake
Andrea Agnes Eric DiBiaso
Jonathan Ingham
Dale Amason Chris Diminico Alessandro Ingrassia
Richard Baca Hormoz Djahanshahi Kazuhiko Ishibe
Amrik Bains Curtis Donahue
Hideki Isono
Thananya Baldwin Liang Du
Tom Issenhuth
Denis Beaudoin Mike Dudek
Kenneth Jackson
Francois Beauregard Frank Effenberger Andrew Jimenez
David Estes
Piergiorgio Beruto John Johnson
Vipul Bhatt John Ewen
Chad Jones
Gao Bo Ramin Farjad
Peter Jones
Brad Booth Borhan Fathi Moghadam
Lokesh Kabra
Martin Bouda Shahar Feldman Manabu Kagami
David Brandt Vincent Ferretti
Upen Kareti
Ralf-Peter Braun Alan Flatman
Yasuaki Kawatsu
Theodore Brillhart Brian Franchuk
Yong Kim
Paul Brooks Matthias Fritsche
Mark Kimber
Alan Brown Richard Frosch
Andrew Klaus
Matthew Brown Mike Gardner
Michael Klempa
Phillip Brownlee Claude Gauthier
Curtis Knittle
Michal Brychta Ali Ghiasi
Elizabeth Kochuparambil
Chris Bullock
Joel Goergen
Paul Kolesar
Gary Burrell Zhigang Gong
Taiji Kondo
Jairo Bustos Heredia Steven Gorshe
Glen Kramer
Adrian Butter Jens Gottron
Olaf Krieger
John Calvin Steffen Graber
Hans Lackner
Clark Carty Olaf Grau
Jeffrey Lapak
Craig Chabot Robert Grow
Mark Laubach
Mandeep Chadha Yong Guo
Greg Le Cheminant
David Chalupsky Mark Gustlin
Han Hyub Lee
Frank Chang
Marek Hajduczenia
June Hee Lee
Xin Chang Akinori Hayakawa
David Lewis
Chan Chen Hayden Haynes
Jon Lewis
Weiying Cheng Howard Heck
David Li
Golam Choudhury
Rajmohan Hegde
Mike-Peng Li
Keng Hua Chuang David Hess
Jane Lim
Keith Conroy Yasuo Hidaka
Alex Lin
John D'Ambrosia Brian Holden
Robert Lingle
Yair Darshan Rita Horner
Dekun Liu
Piers Dawe
Bernd Horrmeyer Hai-Feng Liu
Fred Dawson Xi Huang Karen Liu
Copyright © 2020 IEEE. All rights reserved.

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ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Zhenyu Liu Dino Pozzebon Stephen Trowbridge
Miklos Lukacs Rick Rabinovich
Ta Chin Tseng
Adee Ran
Kent Lusted
Ed Ulrichs
Alon Regev
Zahy Madgar
Daisuke Umeda
Jeffery Maki Duane Remein
Alexander Umnov
David Malicoat Victor Renteria
Sterling A. Vaden
Arthur Marris Michael Ressl
Paul Vanderlaan
Salvatore Rotolo
Takeo Masuda
Ricky Vernickel
Kirsten Matheus Alexander Rysin
Marco Vitali
Erdem Matoglu Toshiaki Sakai
Robert Voss
Marco Mazzini Sam Sambasivan
Dylan Walker
Mick McCarthy Edward Sayre
Edward Walter
Brett McClellan James Schuessler
Larry McMillan Steve Sekel Haifei Wang
Greg McSorley Masood Shariff
Roy Wang
Marcel Medina Ramin Shirani
Tongtong Wang
Mizuki Shirao
Richard Mellitz
Xinyuan Wang
Phil Miguelez Kapil Shrikhande
Christoph Wechsler
Martin Miller Jeff Slavick
Brian Welch
Toshiyuki Moritake Daniel Smith
Matthias Wendt
Harald Mueller Scott Sommers
Natalie Wienckowski
Thomas Mueller Bryan Sparrowhawk
Ludwig Winkel
Edward Nakamoto Edward Sprague
James Withey
Paul Neveux Peter Stassar
Peter Wu
Gary Nicholl Heath Stewart
Markus Wucher
John Nolan
David Stover
Kevin Noll Junqing Sun Dayin Xu
Ronald Nordin Liyang Sun
Yu Xu
Mark Nowell Steve Swanson
Shuto Yamamoto
David Ofelt Andre Szczepanek
Adrian Young
Josef Ohni Bharat Tailor
James Young
Tom Palkert Tomoo Takahara
Lennart Yseboodt
Sujan Pandey Kohichi Tamura
Andrew Zambell
Earl Parsons Mehmet Tazebay
Conrad Zerna
Arkadiy Peker
Ronald Tellas
Richard (Yujia) Zhou
Gerald Pepper Geoffrey Thompson
Yan Zhuang
Phong Pham Pirooz Tooyserkani
Martin Zielinski
David Piehler Nathan Tracy
Pavel Zivny
Rick Pimpinella
Matthew Traverso
William Powell Harald Zweck
David Tremblay
The following members of the individual balloting committee voted on this amendment. Individuals may
have not voted, voted for approval, disapproval or abstained on this standard.
Robert Aiello Theodore Brillhart Scott Griffiths
Thomas Alexander Michal Brychta Randall Groves
Richard Alfvin Demetrio Bucaneg Robert Grow
Dale Amason Jairo Bustos Heredia Marek Hajduczenia
Hongming An William Byrd Adam Healey
Pete Anslow Steven B. Carlson Marco Hernandez
Butch Anton Clark Carty Werner Hoelzl
Tim Baggett John Deandrea David Hoglund
Michael Bahr Gergely Huszak
Chris Diminico
Amrik Bains Yasuhiro Hyakutake
Brian Franchuk
Gordon Bechtel Avraham Freedman Atsushi Ito
Piergiorgio Beruto Matthias Fritsche Raj Jain
Burrell Best Claude Gauthier Sang Kwon Jeong
Rich Boyer Devon Gayle Chad Jones
David Brandt Joel Goergen Peter Jones
Ralf-Peter Braun
Zhigang Gong Lokesh Kabra
Nancy Bravin Manabu Kagami
Steffen Graber
Copyright © 2020 IEEE. All rights reserved.

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ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Piotr Karocki Nick S. A. Nikjoo Junqing Sun
Stuart Kerry Paul Nikolich Geoffrey Thompson
Yongbum Kim Mark Nowell Michael Thompson
Wojciech Koczwara Satoshi Obara Nathan Tracy
Taiji Kondo Tom Palkert David Tremblay
Robert Landman Mark-Rene Uchida
Carlos Pardo
Mark Laubach Bansi Patel Dmitri Varsanofiev
David J. Law David Piehler George Vlantis
Hyeong Ho Lee Rick Pimpinella Robert Voss
David Lewis Christopher Pohl Lisa Ward
Jon Lewis William Quackenbush Keith Waters
Michael Lynch
R. K. Rannow Karl Weber
Valerie Maguire Matthias Wendt
Alon Regev
Jeffery Maki Thomas Rettig Scott Willy
Nicolai Malykh Maximilian Riegel Ludwig Winkel
Arthur Marris Gary Robinson James Withey
Michael Maytum Robert Robinson Peter Wu
Mick McCarthy
Toshiaki Sakai Dayin Xu
Brett McClellan Lennart Yseboodt
Nicola Scantamburlo
Larry McMillan Oren Yuen
Dieter Schicketanz
Richard Mellitz Zhen Zhou
Michael Seaman
Martin Miller Thomas Starai Dirk Ziegelmeier
Jose Morales
Heath Stewart Martin Zielinski
Henry Muyshondt
Walter Struppler George Zimmerman
Paul Neveux Pavel Zivny
Mitsutoshi Sugawara
When the IEEE SA Standards Board approved this amendment on 7 November 2019, it had the following
Gary Hoffman, Chair
Ted Burse, Vice Chair
Jean-Philippe Faure, Past Chair
Konstantinos Karachalios, Secretary
Masayuki Ariyoshi David J. Law Annette Reilly
Stephen D. Dukes Joseph Levy Dorothy Stanley
J. Travis Griffith Howard Li Sha Wei
Guido Hiertz Xiaohui Liu Phil Wennblom
Christel Hunter Kevin Lu Philip Winston
Joseph L. Koepfinger* Daleep Mohla Howard Wolfman
Thomas Koshy Andrew Myles Feng Wu
John D. Kulick Jingyi Zhou
*Member Emeritus
Copyright © 2020 IEEE. All rights reserved.

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ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
This introduction is not part of IEEE Std 802.3cg-2019, IEEE Standard for Ethernet—Amendment 5: Physical Layer
Specifications and Management Parameters for 10 Mb/s Operation and Associated Power Delivery over a Single
Balanced Pair of Conductors.
IEEE Std 802.3™ was first published in 1985. Since the initial publication, many projects have added
functionality or provided maintenance updates to the specifications and text included in the standard. Each
IEEE 802.3 project/amendment is identified with a suffix (e.g., IEEE Std 802.3ba™-2010).
The half duplex Media Access Control (MAC) protocol specified in IEEE Std 802.3-1985 is Carrier Sense
Multiple Access with Collision Detection (CSMA/CD). This MAC protocol was key to the experimental
Ethernet developed at Xerox Palo Alto Research Center, which had a 2.94 Mb/s data rate. Ethernet at
10 Mb/s was jointly released as a public specification by Digital Equipment Corporation (DEC), Intel and
Xerox in 1980. Ethernet at 10 Mb/s was approved as an IEEE standard by the IEEE Standards Board in 1983
and subsequently published in 1985 as IEEE Std 802.3-1985. Since 1985, new media options, new speeds of
operation, and new capabilities have been added to IEEE Std 802.3. A full duplex MAC protocol was added
in 1997.
Some of the major additions to IEEE Std 802.3 are identified in the marketplace with their project number.
This is most common for projects adding higher speeds of operation or new protocols. For example, IEEE
Std 802.3u™ added 100 Mb/s operation (also called Fast Ethernet), IEEE Std 802.3z added 1000 Mb/s
operation (also called Gigabit Ethernet), IEEE Std 802.3ae added 10 Gb/s operation (also called 10 Gigabit
Ethernet), IEEE Std 802.3ah™ specified access network Ethernet (also called Ethernet in the First Mile) and
IEEE Std 802.3ba added 40 Gb/s operation (also called 40 Gigabit Ethernet) and 100 Gb/s operation (also
called 100 Gigabit Ethernet). These major additions are all now included in and are superseded by IEEE Std
802.3-2018 and are not maintained as separate documents.
At the date of publication for IEEE Std 802.3cg-2019, IEEE Std 802.3 was composed of the following
IEEE Std 802.3-2018
Section One—Includes Clause 1 through Clause 20 and Annex A through Annex H and Annex 4A.
Section One includes the specifications for 10 Mb/s operation and the MAC, frame formats and service
interfaces used for all speeds of operation.
Section Two—Includes Clause 21 through Clause 33 and Annex 22A through Annex 33E. Section
Two includes management attributes for multiple protocols and speed of operation as well as
specifications for providing power over twisted pair cabling for multiple operational speeds. It also
includes general information on 100 Mb/s operation as well as most of the 100 Mb/s Physical Layer
Section Three—Includes Clause 34 through Clause 43 and Annex 36A through Annex 43C. Section
Three includes general information on 1000 Mb/s operation as well as most of the 1000 Mb/s Physical
Layer specifications.
Section Four—Includes Clause 44 through Clause 55 and Annex 44A through Annex 55B. Section
Four includes general information on 10 Gb/s operation as well as most of the 10 Gb/s Physical Layer
Section Five—Includes Clause 56 through Clause 77 and Annex 57A through Annex 76A. Clause 56
through Clause 67 and Clause 75 through Clause 77, as well as associated annexes, specify subscriber
Copyright © 2020 IEEE. All rights reserved.

---------------------- Page: 12 ----------------------
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
access and other Physical Layers and sublayers for operation from 512 kb/s to 10 Gb/s, and defines
services and protocol elements that enable the exchange of IEEE Std 802.3 format frames between
stations in a subscriber access network. Clause 68 specifies a 10 Gb/s Physical Layer specification.
Clause 69 through Clause 74 and associated annexes specify Ethernet operation over electrical

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