1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 0-626-18267-0 SANS 60794-2-21:2006Edition 1 IEC 60794-2-21:2005Edition 1SOUTH AFRICAN NATIONAL STANDARD Optical fibre cables Part 2-21: Indoor cable
4、s Detailed specification for multi-fibre optical distribution cables for use in premises cabling This national standard is the identical implementation of IEC 60794-2-21:2005 and is adopted with the permission of the International Electrotechnical Commission. Published by Standards South Africa 1 dr
5、 lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 60794-2-21:2006 Edition 1 IEC 60794-2-21:2005 Edition 1 Table of changes Change No. Date Scope National foreword This South African stan
6、dard was approved by National Committee StanSA SC 74A, Communication technology Fibre optics, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. NORME INTERNATIONALECEIIECINTERNATIONAL STANDARD 60794-2-21Premire ditionFirst edition2005-06Cbl
7、es fibres optiques Partie 2-21: Cbles intrieurs Spcification particulire pour les cbles optiques multi-fibres de distribution utiliss dans le cblage de locaux Optical fibre cables Part 2-21: Indoor cables Detailed specification for multi-fibre optical distribution cables for use in premises cabling
8、Pour prix, voir catalogue en vigueur For price, see current catalogue IEC 2005 Droits de reproduction rservs Copyright - all rights reserved Aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd, lectronique ou mcanique, y compris la p
9、hotocopie et les microfilms, sans laccord crit de lditeur. 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 the publisher. International Electrotechnical Commissio
10、n, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch CODE PRIX PRICE CODE H Commission Electrotechnique InternationaleInternational Electrotechnical Commission 60794-2-21 IEC:2005 3 CONTENTS FOREWORD
11、.5 1 Scope.9 2 Normative references .9 3 General requirements.11 4 Particular requirements 11 4.1 Environmental requirements11 4.1.1 Temperature cycling 11 4.2 Transmission requirements .11 4.2.1 Attenuation of cabled fibre.11 4.2.2 Fibre bandwidth requirements13 Bibliography15 Table 1 Multimode max
12、imum cable attenuation coefficient (dB/km)13 Table 2 Single-mode maximum cable attenuation coefficient (dB/km) 13 Table 3 Minimum multimode fibre bandwidth (MHzkm)13 60794-2-21 IEC:2005 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 2-21: Indoor cables Detailed specification
13、 for multi-fibre optical distribution cables for use in premises cabling FOREWORD 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 inte
14、rnational co-operation on all questions concerning standardization in the electrical 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 (hereaft
15、er referred to as “IEC Publication(s)”). Their preparation is entrusted to technical 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 partici
16、pate in this preparation. IEC collaborates closely with the International Organization 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 i
17、nternational consensus of opinion on the relevant subjects since each technical 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 re
18、asonable efforts are made to ensure that the technical content of IEC Publications 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
19、IEC Publications transparently to the maximum extent possible in their national 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 provides no marking procedure to indicate its
20、approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 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, servants or agents including individu
21、al 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, use of, or reliance upon, thi
22、s 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 that some of the elements of thi
23、s 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 60794-2-21 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This first edition of I
24、EC 60794-2-21 cancels and replaces IEC/PAS 60794-2-21, published in March 2004. This standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2, IEC 60794-2, and IEC 60794-2-20. 60794-2-21 IEC:2005 7 The text of this standard is based on the following documents: FDIS Report on voting 86
25、A/997/FDIS 86A/1004/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 drafted in accordance with the ISO/IEC Directives, Part 2. IEC 60794 consists of the following parts, under the genera
26、l title Optical fibre cables: Part 1-1: Generic specification General Part 1-2: Generic specification Basic optical cable test procedures Part 2: Indoor cables Sectional specification Part 2-10: Indoor cables Family specification for simplex and duplex cables Part 2-11: Indoor cables Detailed specif
27、ication for simplex and duplex cables for use in premises cabling Part 2-20: Indoor cables Family specification for multi-fibre optical distribution cables Part 2-21: Indoor cables Detailed specification for multi-fibre optical distribution cables for use in premises cabling Part 2-30: Indoor cables
28、 Family specification for optical fibre ribbon cables Part 2-31: Indoor cables Detailed specification for optical fibre ribbon cables for use in premises cabling Part 3 : Sectional specification Outdoor cables Part 3-10: Outdoor cables Family specification for duct and directly buried optical teleco
29、mmunication cables Part 3-12: Outdoor cables Detailed specification for duct and directly buried optical telecommunication cables for use in premises cabling Part 3-20: Outdoor cables Family specification for optical self-supporting aerial telecommunication cables Part 3-21: Outdoor cables Detailed
30、specification for optical self-supporting aerial telecommunication cables for use in premises cabling Part 3-30: Outdoor cables Family specification for optical telecommunication cables for lake and river crossings Part 4 : Sectional specification Aerial optical cables along electrical power lines T
31、he committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed; withdrawn; replaced b
32、y a revised edition, or amended. 60794-2-21 IEC:2005 9 OPTICAL FIBRE CABLES Part 2-21: Indoor cables Detailed specification for multi-fibre optical distribution cables for use in premises cabling 1 Scope This part of IEC 60794 is a detailed specification. It presents the detailed requirements specif
33、ic to multi-fibre optical distribution cables for use in premises cabling, to ensure compatibility with ISO 11801 11). The requirements of the family specification IEC 60794-2-20 are applicable to cables covered by this standard. 2 Normative references The following referenced documents are indispen
34、sable for the application of this document. For dated references, only the edition cited applies. 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-
35、1, Clause 2, and IEC 60794-1-2, Clause 2) in the sectional specification (IEC 60794-2, Clause 2) or in the family specification (IEC 60794-2-20, Clause 2). IEC 60793-2-10:2002, Optical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres IEC 60793-2-50, O
36、ptical fibres Part 2-50: Product specifications Sectional specification for class B single-mode fibres IEC 60794-1-1:2001, Optical fibre cables Part 1-1: Generic specification General IEC 60794-1-2:2003, Optical fibre cables Part 1-1: Generic specification Basic optical cable test procedures IEC 607
37、94-2:2002, Optical fibre cables Part 2: Indoor cables Sectional specification IEC 60794-2-20:2003, Optical fibre cables Part 2-20: Indoor cables Family specification for multi-fibre optical distribution cables 1)Figures in brackets refer to the Bibliography. 60794-2-21 IEC:2005 11 3 General requirem
38、ents The cables shall comply with the family specification (IEC 60794-2-20) and meet the requirements which are defined in it. The optical fibres contained in the cables which are covered by this standard shall comply with one of the following standards, and meet the normative requirements defined i
39、n them as applicable: IEC 60793-2-50, Annex A Single-mode fibre, B1.1 type; IEC 60793-2-50, Annex C Single-mode fibre, B1.3 type; IEC 60793-2-10, Annex A Multimode fibre, A1a type , 50 m core diameter; IEC 60793-2-10, Annex B Multimode fibre, A1b type, 62,5 m core diameter. To ensure compatibility w
40、ith ISO 11801 1, optical performance level requirements are presented in terms of the performance classification codes as follows: OS1 Single-mode fibre, B1.1 or B1.3 type; OM1 Multimode fibre, A1a or A1b type; OM2 Multimode fibre, A1a or A1b type; OM3 Multimode fibre, A1a.2 type. NOTE These codes a
41、re informative from the perspective of the requirements defined in this detailed specification. 4 Particular requirements These requirements either define a specific option relative to the requirements of IEC 60794-2-20 or define additional requirements. 4.1 Environmental requirements 4.1.1 Temperat
42、ure cycling The cable shall meet the requirement of IEC 60794-2-20, 4.3.1, option c (20 C to +60 C). 4.2 Transmission requirements 4.2.1 Attenuation of cabled fibre Depending on the fibre type, the attenuation coefficient of the cabled fibre shall be less than the maximum values in Table 1 for the m
43、ultimode fibres and less than the maximum values in Table 2 for single-mode fibres for the wavelengths listed in the column headings. The fibre type shall be agreed between customer and supplier. 60794-2-21 IEC:2005 13 Table 1 Multimode maximum cable attenuation coefficient (dB/km) Fibre type Attenu
44、ation coefficient at 850 nm Attenuation coefficient at 1 300 nm IEC 60793-2-10, A1a.1 type 3,5 1,5 IEC 60793-2-10, A1a.2 type 3,5 1,5 IEC 60793-2-10, A1b type 3,5 1,5 Table 2 Single-mode maximum cable attenuation coefficient (dB/km) Fibre type Attenuation coefficient at 1 310 nm Attenuation coeffici
45、ent at 1 550 nm IEC 60793-2-50, B1.1 or B1.3 type 1,0 1,0 4.2.2 Fibre bandwidth requirements There are no bandwidth requirements on single-mode fibre. For cables containing multimode fibres, the uncabled fibre shall be specified at one of performance levels defined in Table 3 in terms of minimum ban
46、dwidth (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 (MHzkm) Fibre type Nominal core diameter m Overfilled bandwidth at 850 nm Overfilled bandwidth at 1 300 nm Effective moda
47、l bandwidth at 850 nm* Performance code from ISO 11801 1 IEC 60793-2-10, A1a.1 type 50 200 500 Non-applicable OM1 IEC 60793-2-10, A1a.1 type 50 500 500 Non-applicable OM2 IEC 60793-2-10, A1a.2 type 50 1 500 500 2 000 OM3 IEC 60793-2-10, A1b type 62,5 200 500 Non-applicable OM1 IEC 60793-2-10, A1b type 62,5 500 500 Non-applicable OM2 60794-2-21 IEC:2005 15 Bibliography 1 ISO 11801:2002, Information technology Generic cabling for customers premises _ Standards South AfricaThis s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .
