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IEEE Std 802.3cn™‐2019.pdf
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IEEE Std 802.3cn™-2019
(Amendment to IEEE Std 802.3™-2018
as amended by IEEE Std 802.3cb™-2018,
IEEE Std 802.3bt™-2018, and
IEEE Std 802.3cd™-2018)
IEEE Standard for Ethernet
Physical Layers and Management
Parameters for 50 Gb/s, 200 Gb/s, and
400 Gb/s Operation over Single-Mode Fiber
Developed by the
LAN/MAN Standards Committee
IEEE Computer Society
Approved 7 November 2019
IEEE SA Standards Board
The Institute of Electrical and Electronics Engineers, Inc.
3 Park Avenue, New York, NY 10016-5997, USA
Copyright © 2019 by The Institute of Electrical and Electronics Engineers, Inc.
All rights reserved. Published 20 December 2019. 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 978-1-5044-6384-3 STD24016
Print: ISBN 978-1-5044-6385-0 STDPD24016
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Abstract: This amendment to IEEE Std 802.3-2018 adds Physical Layer (PHY) specifications and
management parameters for 50 Gb/s, 200 Gb/s, and 400 Gb/s operation over single-mode fiber
with reaches of at least 40 km.
Keywords: 50 Gb/s Ethernet, 50GBASE-ER, 200 Gb/s Ethernet, 200GBASE-ER4, 400 Gb/s
Ethernet, 400GBASE-ER8, amendment, EEE, Energy-Efficient Ethernet, Ethernet, FEC, forward
error correction, IEEE 802.3™, IEEE 802.3cn™, PAM4, physical medium dependent sublayer,
PMD sublayer, single-mode fiber, SMF
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