IEC IEC61280-4-2 Edition 3.02024-05 REDLINE VERSION NTERNATIONAL STANDARD colour inside Fibre- optic communication subsystem test procedures : Part 4-2: Installed-cable cabling plant - Single-mode attenuation and optical returnlossmeasurements IEC 61280-4-2:2024-05 RLV(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright @ 2024 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester. if you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, piease contact the address below or yourlocal IECmemberNational Committeeforfurtherinformation. IEC Secretariat Tel.:+41229190211 3, rue de Varembé [email protected] CH-1211 Geneva 20 www.iec.ch Switzerland About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigendum or an amendment might have been published. IEC publications search - webstore.iec.ch/advsearchform IEc Products & Services Portal - products.iec.ch The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the criteria(reference number,text, technical publications previews, graphical symbols and the glossary. varietyof committee, ...). It also gives information on projects, replaced With a subscription you wili always have access to up to date and withdrawn publications. contenttailored to yourneeds. IEc Just Published - webstore.iec.ch/justpublished Electropedia-www.electropedia.org Stay up to date on all new IEC publications. Just Published The world's leading online dictionary on electrotechnology, details all newpublicationsreleased.Availableonlineandonce containing more than 22 500 terminological entries in English a month by email. and French, with equivalent terms in 25 additional languages. Also known as the International Electrotechnical Vocabulary IECCustomerServiceCentre-webstore.iec.ch/csc (IEV) online If you wish to giveus yourfeedback on this publication orneed further assistance, please contact the Customer Service Centre: [email protected]. IEC IEC 61280-4-2 Edition 3.0 2024-05 REDLINE VERSION INTERNATIONAL STANDARD colour inside Fibre- optic communication subsystem test procedures - Part 4-2: Installed-cable cabling plant - Single-mode attenuation and optical returnloss measurements INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS33.100.01 ISBN 978-2-8322-8892-4 Warning! Make sure that you obtained this publication from an authorized distributor. ? Registered trademark of the International Electrotechnical Commission