ISO/IEC/IEEE 8802-3:2021/Amd 5:2021

INTERNATIONAL
ISO/ IEC/IEEE
STANDARD
8802-3
Third edition
2021-02
AMENDMENT 5
2021-12
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
Reference number
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
© IEEE 2020
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
© IEEE 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from IEEE at the address below.
Institute of Electrical and Electronics Engineers, Inc
3 Park Avenue, New York
NY 10016-5997, USA
Email: stds.ipr@ieee.org
Website: www.ieee.org
Published in Switzerland
ii
© IEEE 2020 – All rights reserved

ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the
work.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO/IEC documents should be noted. This document was drafted in accordance with
the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or
www.iec.ch/members_experts/refdocs).
IEEE Standards documents are developed within the IEEE Societies and the Standards Coordinating
Committees of the IEEE Standards Association (IEEE-SA) Standards Board. The IEEE develops its
standards through a consensus development process, approved by the American National Standards
Institute, which brings together volunteers representing varied viewpoints and interests to achieve the
final product. Volunteers are not necessarily members of the Institute and serve without compensation.
While the IEEE administers the process and establishes rules to promote fairness in the consensus
development process, the IEEE does not independently evaluate, test, or verify the accuracy of any of the
information contained in its standards.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. Details
of any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC list of patent
declarations received (see patents.iec.ch).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.
ISO/IEC/IEEE 8802-3:2021/Amd 5 was prepared by the LAN/MAN of the IEEE Computer Society (as
TM
[IEEE Std 802.3 cg -2019) and drafted in accordance with its editorial rules. It was adopted, under the
“fast-track procedure” defined in the Partner Standards Development Organization cooperation
agreement between ISO and IEEE, by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 6, Telecommunications and information exchange between systems.
A list of all parts in the ISO/IEC/IEEE 8802 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html and www.iec.ch/national-
committees.
© IEEE 2020 – All rights reserved iii

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
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
conductors.
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
The Institute of Electrical and Electronics Engineers, Inc.
3 Park Avenue, New York, NY 10016-5997, USA
All rights reserved. Published 5 February 2020. Printed in the United States of America.
IEEE and 802 are registered trademarks in the U.S. Patent & Trademark Office, owned by The Institute of Electrical and
Electronics Engineers, Incorporated.
PDF: ISBN 978-1-5044-6420-8 STD24038
Print: ISBN 978-1-5044-6421-5 STDPD24038
IEEE prohibits discrimination, harassment and bullying.
For more information, visit http://www.ieee.org/web/aboutus/whatis/policies/p9-26.html.
No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior
written permission of the publisher.
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Important Notices and Disclaimers Concerning IEEE Standards
Documents
IEEE documents are made available for use subject to important notices and legal disclaimers. These notices
and disclaimers, or a reference to this page, appear in all standards and may be found under the heading
“Important Notices and Disclaimers Concerning IEEE Standards Documents.” They can also be obtained on
request from IEEE or viewed at http://standards.ieee.org/ipr/disclaimers.html.
Notice and Disclaimer of Liability Concerning the Use of IEEE Standards
Documents
IEEE Standards documents (standards, recommended practices, and guides), both full-use and trial-use, are
developed within IEEE Societies and the Standards Coordinating Committees of the IEEE Standards
Association (“IEEE SA”) Standards Board. IEEE (“the Institute”) develops its standards through a
consensus development process, approved by the American National Standards Institute (“ANSI”), which
brings together volunteers representing varied viewpoints and interests to achieve the final product. IEEE
Standards are documents developed through scientific, academic, and industry-based technical working
groups. Volunteers in IEEE working groups are not necessarily members of the Institute and participate
without compensation from IEEE. While IEEE administers the process and establishes rules to promote
fairness in the consensus development process, IEEE does not independently evaluate, test, or verify the
accuracy of any of the information or the soundness of any judgments contained in its standards.
IEEE Standards do not guarantee or ensure safety, security, health, or environmental protection, or ensure
against interference with or from other devices or networks. Implementers and users of IEEE Standards
documents are responsible for determining and complying with all appropriate safety, security,
environmental, health, and interference protection practices and all applicable laws and regulations.
IEEE does not warrant or represent the accuracy or content of the material contained in its standards, and
expressly disclaims all warranties (express, implied and statutory) not included in this or any other
document relating to the standard, including, but not limited to, the warranties of: merchantability; fitness
for a particular purpose; non-infringement; and quality, accuracy, effectiveness, currency, or completeness
of material. In addition, IEEE disclaims any and all conditions relating to: results; and workmanlike effort.
IEEE standards documents are supplied “AS IS” and “WITH ALL FAULTS.”
Use of an IEEE standard is wholly voluntary. The existence of an IEEE standard does not imply that there
are no other ways to produce, test, measure, purchase, market, or provide other goods and services related to
the scope of the IEEE standard. Furthermore, the viewpoint expressed at the time a standard is approved and
issued is subject to change brought about through developments in the state of the art and comments
received from users of the standard.
In publishing and making its standards available, IEEE is not suggesting or rendering professional or other
services for, or on behalf of, any person or entity nor is IEEE undertaking to perform any duty owed by any
other person or entity to another. Any person utilizing any IEEE Standards document, should rely upon his
or her own independent judgment in the exercise of reasonable care in any given circumstances or, as
appropriate, seek the advice of a competent professional in determining the appropriateness of a given IEEE
standard.
IN NO EVENT SHALL IEEE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO:
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE PUBLICATION, USE OF, OR RELIANCE
UPON ANY STANDARD, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE AND
REGARDLESS OF WHETHER SUCH DAMAGE WAS FORESEEABLE.
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Translations
The IEEE consensus development process involves the review of documents in English only. In the event
that an IEEE standard is translated, only the English version published by IEEE should be considered the
approved IEEE standard.
Official statements
A statement, written or oral, that is not processed in accordance with the IEEE SA Standards Board
Operations Manual shall not be considered or inferred to be the official position of IEEE or any of its
committees and shall not be considered to be, or be relied upon as, a formal position of IEEE. At lectures,
symposia, seminars, or educational courses, an individual presenting information on IEEE standards shall
make it clear that his or her views should be considered the personal views of that individual rather than the
formal position of IEEE.
Comments on standards
Comments for revision of IEEE Standards documents are welcome from any interested party, regardless of
membership affiliation with IEEE. However, IEEE does not provide consulting information or advice
pertaining to IEEE Standards documents. Suggestions for changes in documents should be in the form of a
proposed change of text, together with appropriate supporting comments. Since IEEE standards represent a
consensus of concerned interests, it is important that any responses to comments and questions also receive
the concurrence of a balance of interests. For this reason, IEEE and the members of its societies and
Standards Coordinating Committees are not able to provide an instant response to comments or questions
except in those cases where the matter has previously been addressed. For the same reason, IEEE does not
respond to interpretation requests. Any person who would like to participate in revisions to an IEEE
standard is welcome to join the relevant IEEE working group.
Comments on standards should be submitted to the following address:
Secretary, IEEE SA Standards Board
445 Hoes Lane
Piscataway, NJ 08854 USA
Laws and regulations
Users of IEEE Standards documents should consult all applicable laws and regulations. Compliance with the
provisions of any IEEE Standards document does not imply compliance to any applicable regulatory
requirements. Implementers of the standard are responsible for observing or referring to the applicable
regulatory requirements. IEEE does not, by the publication of its standards, intend to urge action that is not
in compliance with applicable laws, and these documents may not be construed as doing so.
Copyrights
IEEE draft and approved standards are copyrighted by IEEE under US and international copyright laws.
They are made available by IEEE and are adopted for a wide variety of both public and private uses. These
include both use, by reference, in laws and regulations, and use in private self-regulation, standardization,
and the promotion of engineering practices and methods. By making these documents available for use and
adoption by public authorities and private users, IEEE does not waive any rights in copyright to the
documents.
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Photocopies
Subject to payment of the appropriate fee, IEEE will grant users a limited, non-exclusive license to
photocopy portions of any individual standard for company or organizational internal use or individual, non-
commercial use only. To arrange for payment of licensing fees, please contact Copyright Clearance Center,
Customer Service, 222 Rosewood Drive, Danvers, MA 01923 USA; +1 978 750 8400. Permission to
photocopy portions of any individual standard for educational classroom use can also be obtained through
the Copyright Clearance Center.
Updating of IEEE Standards documents
Users of IEEE Standards documents should be aware that these documents may be superseded at any time
by the issuance of new editions or may be amended from time to time through the issuance of amendments,
corrigenda, or errata. An official IEEE document at any point in time consists of the current edition of the
document together with any amendments, corrigenda, or errata then in effect.
Every IEEE standard is subjected to review at least every 10 years. When a document is more than 10 years
old and has not undergone a revision process, it is reasonable to conclude that its contents, although still of
some value, do not wholly reflect the present state of the art. Users are cautioned to check to determine that
they have the latest edition of any IEEE standard.
In order to determine whether a given document is the current edition and whether it has been amended
through the issuance of amendments, corrigenda, or errata, visit IEEE Xplore at https://ieeexplore.ieee.org
or contact IEEE at the address listed previously. For more information about the IEEE SA or IEEE’s
standards development process, visit the IEEE SA Website at http://standards.ieee.org.
Errata
Errata, if any, for IEEE standards can be accessed via https://standards.ieee.org/standard/index.html. Search
for standard number and year of approval to access the web page of the published standard. Errata links are
located under the Additional Resources Details section. Errata are also available in IEEE Xplore:
https://ieeexplore.ieee.org/browse/standards/collection/ieee/. Users are encouraged to periodically check for
errata.
Patents
Attention is called to the possibility that implementation of this standard may require use of subject matter
covered by patent rights. By publication of this standard, no position is taken by the IEEE with respect to the
existence or validity of any patent rights in connection therewith. If a patent holder or patent applicant has
filed a statement of assurance via an Accepted Letter of Assurance, then the statement is listed on the IEEE
SA Website at https://standards.ieee.org/about/sasb/patcom/patents.html. Letters of Assurance may indicate
whether the Submitter is willing or unwilling to grant licenses under patent rights without compensation or
under reasonable rates, with reasonable terms and conditions that are demonstrably free of any unfair
discrimination to applicants desiring to obtain such licenses.
Essential Patent Claims may exist for which a Letter of Assurance has not been received. The IEEE is not
responsible for identifying Essential Patent Claims for which a license may be required, for conducting
inquiries into the legal validity or scope of Patents Claims, or determining whether any licensing terms or
conditions provided in connection with submission of a Letter of Assurance, if any, or in any licensing
agreements are reasonable or non-discriminatory. Users of this standard are expressly advised that
determination of the validity of any patent rights, and the risk of infringement of such rights, is entirely their
own responsibility. Further information may be obtained from the IEEE Standards Association.
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Participants
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
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
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
membership:
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
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Introduction
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
documents:
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
specifications.
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
specifications.
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
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
backplanes at speeds of 1000 Mb/s and 10 Gb/s.
Section Six—Includes Clause 78 through Clause 95 and Annex 83A through Annex 93C. Clause 78
specifies Energy-Efficient Ethernet. Clause 79 specifies IEEE 802.3 Organizationally Specific Link
Layer Discovery Protocol (LLDP) type, length, and value (TLV) information elements. Clause 80
through Clause 95 and associated annexes include general information on 40 Gb/s and 100 Gb/s
operation as well the 40 Gb/s and 100 Gb/s Physical Layer specifications. Clause 90 specifies Ethernet
support for time synchronization protocols.
Section Seven—Includes Clause 96 through Clause 115 and Annex 97A through Annex 115A.
Clause 96 through Clause 98, Clause 104, and associated annexes, specify Physical Layers and
optional features for 100 Mb/s and 1000 Mb/s operation over a single twisted pair. Clause 100 through
Clause 103, as well as associated annexes, specify Physical Layers for the operation of the EPON
protocol over coaxial distribution networks. Clause 105 through Clause 114 and associated annexes
include general information on 25 Gb/s operation as well as 25 Gb/s Physical Layer specifications.
Clause 99 specifies a MAC merge sublayer for the interspersing of express traffic. Clause 115 and its
associated annex specify a Physical Layer for 1000 Mb/s operation over plastic optical fiber.
Section Eight—Includes Clause 116 through Clause 126 and Annex 119A through Annex 120E.
Clause 116 through Clause 124 and associated annexes include general information on 200 Gb/s and
400 Gb/s operation as well the 200 Gb/s and 400 Gb/s Physical Layer specifications. Clause 125 and
Clause 126 include general information on 2.5 Gb/s and 5 Gb/s operation as well as 2.5 Gb/s and
5 Gb/s Physical Layer specifications.
IEEE Std 802.3cb™-2018
Amendment 1—This amendment includes changes to IEEE Std 802.3-2018 and its amendments and
adds Clause 127 through Clause 130, Annex 127A, Annex 128A, Annex 128B, and Annex 130A. This
amendment adds new Physical Layers for operation at 2.5 Gb/s and 5 Gb/s over electrical backplanes.
IEEE Std 802.3bt™-2018
Amendment 2—This amendment includes changes to IEEE Std 802.3-2018 and its amendments and
adds Clause 145, Annex 145A, Annex 145B, and Annex 145C. This amendment adds power delivery
using all four pairs in the structured wiring plant, resulting in greater power being available to end
devices. This amendment also allows for lower standby power consumption in end devices and adds a
mechanism to better manage the available power budget.
IEEE Std 802.3cd™-2018
Amendment 3—This amendment includes changes to IEEE Std 802.3-2018 and its amendments and
adds Clause 131 through Clause 140 and Annex 135A through Annex 136D. This amendment adds
MAC parameters, Physical Layers, and management parameters for the transfer of IEEE 802.3 format
frames at 50 Gb/s, 100 Gb/s, and 200 Gb/s.
IEEE Std 802.3cn™-2019
Amendment 4—This amendment includes changes to IEEE Std 802.3-2018 and its amendments and
adds 50 Gb/s, 200 Gb/s, and 400 Gb/s Physical Layer specifications and management parameters for
operation over single-mode fiber with reaches of at least 40 km.
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
IEEE Std 802.3cg™-2019
Amendment 5—This amendment includes changes to IEEE Std 802.3-2018 and its amendments and
adds Clause 146 through Clause 148 and Annex 146A and Annex 146B. This amendment adds
10 Mb/s Physical Layer specifications and management parameters for operation on a single balanced
pair of conductors.
Two companion documents exist, IEEE Std 802.3.1 and IEEE Std 802.3.2. IEEE Std 802.3.1 describes
Ethernet management information base (MIB) modules for use with the Simple Network Management
Protocol (SNMP). IEEE Std 802.3.2 describes YANG data models for Ethernet. IEEE Std 802.3.1 and IEEE
Std 802.3.2 are updated to add management capability for enhancements to IEEE Std 802.3 after approval of
those enhancements.
IEEE Std 802.3 will continue to evolve. New Ethernet capabilities are anticipated to be added within the
next few years as amendments to this standard.
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
Contents
1. Introduction. 26
1.1 Overview. 26
1.1.3 Architectural perspectives. 26
1.3 Normative references. 26
1.4 Definitions . 27
1.5 Abbreviations. 29
9. Repeater unit for 10 Mb/s baseband networks. 30
9.1 Overview. 30
22. Reconciliation Sublayer (RS) and Media Independent Interface (MII). 31
22.1 Overview. 31
22.2 Functional specifications . 31
22.2.2 MII signal functional specifications . 31
22.2.2.4 TXD (transmit data). 31
22.2.2.5 TX_ER (transmit coding error) . 32
22.2.2.8 RXD (receive data). 32
22.8 Protocol implementation conformance statement (PICS) proforma for Clause 22,
Reconciliation Sublayer (RS) and Media Independent Interface (MII) . 33
22.8.2 Identification. 33
22.8.2.3 Major capabilities/options . 33
22.8.3 PICS proforma tables for reconciliation sublayer and media independent interface 33
22.8.3.2 MII signal functional specifications . 33
30. Management. 34
30.2 Managed objects . 34
30.2.2 Overview of managed objects. 34
30.2.2.1 Text description of managed objects . 34
30.2.3 Containment. 35
30.2.5 Capabilities . 36
30.3 Layer management for DTEs. 36
30.3.2 PHY device managed object class . 36
30.3.2.1 PHY device attributes. 36
30.3.2.1.2 aPhyType . 36
30.3.2.1.3 aPhyTypeList . 37
30.5 Layer management for medium attachment units (MAUs) . 37
30.5.1 MAU managed object class . 37
30.5.1.1 MAU attributes . 37
30.5.1.1.2 aMAUType . 37
30.5.1.1.4 aMediaAvailable. 37
30.6 Management for link Auto-Negotiation . 37
30.6.1 Auto-Negotiation managed object class . 37
30.6.1.1 Auto-Negotiation attributes . 37
30.6.1.1.5 aAutoNegLocalTechnologyAbility . 37
30.15 Layer management for Power over Data Lines (PoDL) of Single Balanced
Twisted-Pair Ethernet . 38
30.15.1 PoDL PSE managed object class. 38
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
30.15.1.1 PoDL PSE attributes. 38
30.15.1.1.4 aPoDLPSEType. 38
30.15.1.1.5 aPoDLPSEDetectedPDType. 38
30.15.1.1.6 aPoDLPSEDetectedPDPowerClass . 38
30.16 Management for PLCA Reconciliation Sublayer . 39
30.16.1 PLCA managed object class . 39
30.16.1.1 PLCA attributes . 39
30.16.1.1.1 aPLCAAdminState . 39
30.16.1.1.2 aPLCAStatus. 39
30.16.1.1.3 aPLCANodeCount . 39
30.16.1.1.4 aPLCALocalNodeID . 40
30.16.1.1.5 aPLCATransmitOpportunityTimer. 40
30.16.1.1.6 aPLCAMaxBurstCount. 40
30.16.1.1.7 aPLCABurstTimer . 40
30.16.1.2 PLCA device actions . 40
30.16.1.2.1 acPLCAAdminControl . 40
30.16.1.2.2 acPLCAReset. 41
45. Management Data Input/Output (MDIO) Interface. 42
45.2 MDIO Interface Registers. 42
45.2.1 PMA/PMD registers . 42
45.2.1.7 PMA/PMD status 2 register (Register 1.8). 42
45.2.1.7.4 Transmit fault (1.8.11) . 42
45.2.1.7.5 Receive fault (1.8.10). 42
45.2.1.16 BASE-T1 PMA/PMD extended ability register (1.18) . 43
45.2.1.185 BASE-T1 PMA/PMD control register (Register 1.2100) . 43
45.2.1.185.2 Type selection (1.2100.3:0) . 43
45.2.1.186a 10BASE-T1L PMA control register (Register 1.2294). 44
45.2.1.186a.1 PMA reset (1.2294.15). 44
45.2.1.186a.2 Transmit disable (1.2294.14) . 45
45.2.1.186a.3 Transmit voltage amplitude control (1.2294.12) . 45
45.2.1.186a.4 Low-power (1.2294.11) . 45
45.2.1.186a.5 EEE enable (1.2294.10) . 45
45.2.1.186a.6 Loopback (1.2294.0). 45
45.2.1.186b 10BASE-T1L PMA status register (Register 1.2295) . 45
45.2.1.186b.1 Loopback ability (1.2295.13). 46
45.2.1.186b.2 2.4 Vpp operating mode ability (1.2295.12). 46
45.2.1.186b.3 Low-power ability (1.2295.11). 46
45.2.1.186b.4 EEE ability (1.2295.10) . 47
45.2.1.186b.5 Receive fault ability (1.2295.9) . 47
45.2.1.186b.6 Receive polarity (1.2295.2) . 47
45.2.1.186b.7 Receive fault (1.2295.1). 47
45.2.1.186b.8 Receive link status (1.2295.0). 47
45.2.1.186c 10BASE-T1L test mode control register (Register 1.2296). 47
45.2.1.186c.1 Test mode control (1.2296.15:13). 48
45.2.1.186d 10BASE-T1S PMA control register (Register 1.2297) . 48
45.2.1.186d.1 PMA reset (1.2297.15). 48
45.2.1.186d.2 Transmit disable (1.2297.14) . 49
45.2.1.186d.3 Low-power (1.2297.11) . 49
45.2.1.186d.4 Multidrop mode (1.2297.10). 49
45.2.1.186d.5 Loopback (1.2297.0). 49
45.2.1.186e 10BASE-T1S PMA status register (Register 1.2298) . 49
45.2.1.186e.1 10BASE-T1S loopback ability (1.2298.13). 50
ISO/IEC/IEEE 8802-3:2021/Amd.5:2021(E)
45.2.1.186e.2 Low-power ability (1.2298.11). 50
45.2.1.186e.3 Multidrop ability (1.2298.10) . 50
45.2.1.186e.4 Receive fault ability (1.2
...