1、 IEC 60794-3-21 Edition 2.0 2015-11 INTERNATIONAL STANDARD Optical fibre cables Part 3-21: Outdoor cables Product specification for optical self-supporting aerial telecommunication cables for use in premises cabling IEC 60794-3-21:2015-11(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Cop
2、yright 2015 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 IECs member Na
3、tional 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, please contact the address below or your local IEC member National Committee for further information. IEC Central Office Tel.: +41
4、 22 919 02 11 3, rue de Varemb Fax: +41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch 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
5、 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 corrigenda or an amendment might have been published. IEC Catalogue - webstore.iec.ch/catalogue The stand-alone application f
6、or consulting the entire bibliographical information on IEC International Standards, Technical Specifications, Technical Reports and other documents. Available for PC, Mac OS, Android Tablets and iPad. IEC publications search - www.iec.ch/searchpub The advanced search enables to find IEC publication
7、s by a variety of criteria (reference number, text, technical committee,). It also gives information on projects, replaced and withdrawn publications. IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published details all new publications released.
8、 Available online and also once a month by email. Electropedia - www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 30 000 terms and definitions in English and French, with equivalent terms in 15 additional languages. Also known as the I
9、nternational Electrotechnical Vocabulary (IEV) online. IEC Glossary - std.iec.ch/glossary More than 60 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002. Some entries have been collected from earlier p
10、ublications of IEC TC 37, 77, 86 and CISPR. IEC Customer Service Centre - webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 60794-3-21 Edition 2.0 2015-11 INTERNATIONAL STANDARD Optical
11、fibre cables Part 3-21: Outdoor cables Product specification for optical self-supporting aerial telecommunication cables for use in premises cabling INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.180.10 ISBN 978-2-8322-3001-5 Registered trademark of the International Electrotechnical Commission Wa
12、rning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 60794-3-21:2015 IEC 2015 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references. 5 3 General requirements 5 4 Particular requirements 6 4.1 General . 6 4.2 Environmental requirements Temperature c
13、ycling . 6 4.3 Transmission requirements 6 4.3.1 Attenuation of cabled fibre 6 4.3.2 Fibre bandwidth requirements 7 4.3.3 Polarization mode dispersion (PMD) requirements 7 Table 1 Multimode maximum cable attenuation coefficient (dB/km) . 6 Table 2 Single-mode maximum cable attenuation coefficient (d
14、B/km) 7 Table 3 Minimum multimode fibre bandwidth (MHzkm) . 7 IEC 60794-3-21:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 3-21: Outdoor cables Product specification for optical self-supporting aerial telecommunication cables for use in premises cabling FOREWO
15、RD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the elect
16、rical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to tech
17、nical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Orga
18、nization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technica
19、l committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publicat
20、ions is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their nationa
21、l and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment servic
22、es and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servan
23、ts or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication
24、, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility t
25、hat some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60794-3-21 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre
26、optics. This second edition cancels and replaces the first edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) reference to ISO 24702; b) reference to Fibre B6 (IEC 60793-
27、2-50); c) reference to the OS2 Fibre as defined by ISO/IEC 11801. 4 IEC 60794-3-21:2015 IEC 2015 This standard shall be used in conjunction with IEC 60794-1-1, IEC 60794-1-2, IEC 60794-3 and IEC 60794-3-20. The text of this standard is based on the following documents: CDV Report on voting 86A/1564/
28、CDV 86A/1624/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 60794 series, published under the g
29、eneral title Optical fibre cables, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date
30、, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be use
31、ful for the correct understanding of its contents. Users should therefore print this document using a colour printer. IEC 60794-3-21:2015 IEC 2015 5 OPTICAL FIBRE CABLES Part 3-21: Outdoor cables Product specification for optical self-supporting aerial telecommunication cables for use in premises ca
32、bling 1 Scope This part of IEC 60794 is a product specification. It presents the detailed requirements specific to optical self-supporting aerial telecommunication cables for use in premises cabling to ensure compatibility with ISO/IEC 11801 and ISO/IEC 24702. The requirements of the family specific
33、ation IEC 60794-3-20 and sectional specification IEC 60794-3 are applicable to cables covered by this standard. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the e
34、dition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60793-2-10:2011, Optical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres IEC 60793-2-50:2012, Optical fibres Part 2-50
35、: Product specifications Sectional specification for class B single-mode fibres IEC 60794-1-1, Optical fibre cables Part 1-1: Generic specification General IEC 60794-1-2, Optical fibre cables Part 1-2: Generic specification Cross reference table for optical cable test procedures IEC 60794-3, Optical
36、 fibre cables Part 3: Outdoor cables Sectional specification IEC 60794-3-20, Optical fibre cables Part 3-20: Outdoor cables Family specification for self-supporting aerial telecommunication cables ISO/IEC 11801, Information technology Generic cabling for customers premises ISO/IEC 24702, Information
37、 technology Generic cabling Industrial premises 3 General requirements The cable shall comply with the family specification, IEC 60794-3-20, and meet the requirements which are defined in it, including requirements in the sectional specification, IEC 60794-3. The optical fibre contained in cables co
38、vered by this standard shall comply with one of the following standards, and meet the normative requirements defined within them as applicable: IEC 60793-2-50:2012, Annex A (Single-mode fibre category B1.1); 6 IEC 60794-3-21:2015 IEC 2015 IEC 60793-2-50: 2012, Annex C (Single-mode fibre category B1.
39、3); IEC 60793-2-10:2011, Annex A (Multimode fibre, sub-category A1a, 50 m core diameter); IEC 60793-2-10:2011, Annex B (Multimode fibre, sub-category A1b, 62,5 m core diameter). To ensure compatibility with ISO/IEC 11801 and ISO/IEC 24702, optical performance level requirements are presented in term
40、s of the following performance classification codes: OS1 single-mode fibre, category B1.1, B1.3, or B6; OS2 single-mode fibre, category B1.3 or sub-category B6_a; OM1 multimode fibre, sub-category A1a or A1b; OM2 multimode fibre, sub-category A1a or A1b; OM3 multimode fibre, model A1a.2; OM4 multimo
41、de fibre, model A1a.3. NOTE These codes are informative from the perspective of the requirements defined in IEC 60794-3-20. 4 Particular requirements 4.1 General These requirements either define a specific option relative to the requirements of IEC 60794-3-20 or define additional requirements. 4.2 E
42、nvironmental requirements Temperature cycling The cable shall meet the requirements of ISO/IEC 11801 and ISO/IEC 24702, with the following values: TA1: 10 C TA2: 25 C TA3: 40 C TB1: +60 C TB2: +70 C 4.3 Transmission requirements 4.3.1 Attenuation of cabled fibre Depending on the fibre type, the atte
43、nuation coefficient of the cabled fibre shall be less than the maximum values in Table 1 for the multimode fibres, and less than the maximum values in Table 2 for single-mode fibres for the wavelengths listed in the Table 1 column headings and in Table 2. The fibre type shall be agreed between custo
44、mer and supplier. Table 1 Multimode maximum cable attenuation coefficient (dB/km) Fibre specification Attenuation coefficient at 850 nm Attenuation coefficient at 1 300 nm Performance classification code IEC 60793-2-10, model A1a.1 3,5 1,5 OM1, OM2 IEC 60793-2-10, model A1a.2 3,5 1,5 OM3 IEC 60793-2
45、-10, model A1a.3 3,5 1,5 OM4 IEC 60793-2-10, model A1b 3,5 1,5 OM1, OM2 IEC 60794-3-21:2015 IEC 2015 7 Table 2 Single-mode maximum cable attenuation coefficient (dB/km) Fibre specification Wavelength nm Maximum attenuation coefficient Performance classification code IEC 60793-2-50, B1.3guy, or B6_a
46、1 310, 1 383, 1 550 1,0 OS1 IEC60793-2-50, B1.3 or B6_a 1 310, 1 383, 1 550 0,4 OS2 NOTE IEC SC86A has recommended to ISO/IEC JTC1 SC25 to modify the requirements for OS1 and OS2 fibre in ISO/IEC 11801. The requirements in Table 2 are consistent with these recommendations. In the case of OS1 fibre i
47、n installations specified prior to ISO 11801, in which either B1.1 fibre is used or if the B1 fibre type is unknown, the 1 383 nm requirement is not applicable. 4.3.2 Fibre bandwidth requirements There are no bandwidth requirements on single-mode fibres. For cables containing multimode fibres, the u
48、ncabled fibre shall be specified at one of performance levels defined in Table 3 in terms of minimum bandwidth (MHzkm), wavelength, and type of measurement. The fibre type and performance level shall be agreed between customer and supplier. Table 3 Minimum multimode fibre bandwidth (MHz km) Fibre sp
49、ecification Nominal core diameter m Overfilled bandwidth at 850 nm Overfilled bandwidth at 1 300 nm Effective modal bandwidth at 850 nm Performance classification code IEC 60793-2-10, model A1a.1 50 200 500 Non-applicable OM1 IEC 60793-2-10, model A1a.1 50 500 500 Non-applicable OM2 IEC 60793-2-10, model A1a.2 50 1 500 500 2 000 OM3 IEC 60793-2-10, model A1a.3 50 3 500 500 4 700 OM4 IEC 60793-2-10, sub-category A1b 62,5
