1、 IEC 60794-2-21 Edition 2.0 2012-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical fibre cables Part 2-21: Indoor optical fibre cables Detailed specification for multi-fibre optical distribution cables for use in premises cabling Cbles fibres optiques Partie 2-21: Cbles fibres optiques intrieur
2、s Spcification particulire pour les cbles optiques multi-fibres de distribution utiliss dans le cblage de locaux IEC 60794-2-21:2012 colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publicat
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16、ommentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60794-2-21 Edition 2.0 2012-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical fibre cables Part 2-21: Indoor optical fibre cables Detailed specification for multi-fibre optical distribution cables for
17、 use in premises cabling Cbles fibres optiques Partie 2-21: Cbles fibres optiques intrieurs Spcification particulire pour les cbles optiques multi-fibres de distribution utiliss dans le cblage de locaux INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE H ICS 33.180
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19、ue vous avez obtenu cette publication via un distributeur agr. colour inside 2 60794-2-21 IEC:2012 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative References 5 3 General requirements . 5 4 Particular requirements 6 4.1 Fibre selection for cable testing . 6 4.2 Environmental requirements Temperature cy
20、cling 6 4.3 Transmission requirements . 6 4.3.1 Attenuation of cabled fibre . 6 4.3.2 Fibre bandwidth requirements 7 Bibliography 8 Table 1 Multimode maximum cable attenuation coefficient (dB/km) 7 Table 2 Single-mode maximum cable attenuation coefficient (dB/km) 7 Table 3 Minimum multimode fibre ba
21、ndwidth (MHz km) . 7 60794-2-21 IEC:2012 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 2-21: Indoor optical fibre cables Detailed specification for multi-fibre optical distribution cables for use in premises cabling FOREWORD 1) The International Electrotechnical Commission
22、(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 electrical and electronic fields. To this end and in addi
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31、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 that some of the elements of this IEC Publication may
32、 be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60794-2-21 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This second edition cancels and replaces the
33、 first edition published in 2005. It constitutes a technical revision. The main changes are listed below: Incorporation of the OM4 cabled fibre performance category Incorporation of the OS2 cabled fibre performance category Incorporation of the B6_a1 and B6_a2 fibre category as per IEC 60793-2-50:20
34、08 4 60794-2-21 IEC:2012 The text of this standard is based on the following documents: FDIS Report on voting 86A/1441/FDIS 86A/1450/RVD 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 draft
35、ed in accordance with the ISO/IEC Directives, Part 2. 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, the publicat
36、ion will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this
37、document using a colour printer. 60794-2-21 IEC:2012 5 OPTICAL FIBRE CABLES Part 2-21: Indoor optical fibre cables Detailed specification for multi-fibre optical distribution cables for use in premises cabling 1 Scope This International Standard presents the detailed requirements specific to this ty
38、pe of cable to ensure compatibility with ISO/IEC 11801, Information technology Generic cabling for customer premises. The requirements of the Family Specification IEC 60794-2-20:2008 are applicable to cables covered by this standard. Particular requirements detailed in clause 4 either define a speci
39、fic option relative to the requirements of IEC 60794-2-20:2008 or define additional requirements. 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 edition cited a
40、pplies. For undated references, the latest edition of the referenced document (including any amendments) applies. They complete the normative references already listed in the generic specification (IEC 60794-1-1:2011 and IEC 60794-1-2:2003,) and in the sectional specification (IEC 60794-2:2002, Clau
41、se 2) or in the family specification (IEC 60794-2-20:2011, Clause 2). IEC 60793-2-10:2007, Optical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres IEC 60793-2-50:2008, Optical fibres Part 2-50: Product specifications Sectional specification for class
42、 B single-mode fibres IEC 60794-1-1:2011, Optical Fibre cables Part 1-1: Generic specification General IEC 60794-1-2:2003, Optical fibre cables Part 1-2: Generic specification Basic optical cable test procedures IEC 60794-2:2002, Optical fibre cables Part 2: Indoor cables Sectional specification IEC
43、 60794-2-20:2008, Optical fibre cables Part 2-20: Indoor cables Family specification for multi-fibre optical distribution cable 3 General requirements The cable shall comply with the family specification (IEC 60794-2-20:2008) and meet the requirements that are defined in it. The optical fibre contai
44、ned in the cables which are covered by this standard shall comply with one of the following standards and meet the normative requirements defined within them as applicable: 6 60794-2-21 IEC:2012 IEC 60793-2-50:2008, Annex A Single-mode B1.1 fibre IEC 60793-2-50:2008, Annex C Single-mode B1.3 fibre I
45、EC 60793-2-50:2008, Annex G Single-mode B6_a1 and B6_a2 fibre IEC 60793-2-10:2007, Annex A Multimode A1a.1, 50 m core fibre IEC 60793-2-10:2007, Annex A Multimode A1a.2, 50 m core fibre IEC 60793-2-10:2007, Annex A Multimode A1a.3, 50 m core fibre IEC 60793-2-10:2007, Annex B Multimode A1b, 62.5 m c
46、ore fibre To ensure compatibility with ISO/IEC 11801, optical performance level requirements are presented in terms of the performance classification codes for cabled optical fibre as follows: OS1 Single-mode fibre, B1.1, B1.3 category or sub-category B6_a1 and B6_a2; OS2 Single-mode fibre, B1.3 or
47、sub-category B6_a1 and B6_a2; OM1 Multimode fibre, Model A1a.1 or sub-category A1b; OM2 Multimode fibre, Model A1a.1 or sub-category A1b; OM3 Multimode fibre, Model A1a.2; OM4 Multimode fibre, Model A1a.3; NOTE These codes are informative from the perspective of the requirements defined in this deta
48、iled specification. 4 Particular requirements 4.1 Fibre selection for cable testing The fibre selection for cable testing shall be performed according to the 60794-1-1:2011, Annex B. 4.2 Environmental requirements Temperature cycling The cable shall meet the requirement of IEC 60794-2-20:2008, claus
49、e 4.3 Table 2, option c (20 C to +60 C). The test shall be performed on a 50 m specimen. No attenuation changes (according to the IEC 60794-1-1 annex B3) shall be allowed during the test. 4.3 Transmission requirements 4.3.1 Attenuation of cabled fibre Depending on the fibre category, the attenuation coefficient of the cabled fibr
