BS EN 50173-6:2013 BSI Standards Publication Information technology — Generic cabling systems Part 6: Distributed building services BS EN 50173-6:2013 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 50173-6:2013 The UK participation in its preparation was entrusted to Technical Committee TCT/7, Telecommunications - Installation requirements A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2013 Published by BSI Standards Limited 2013 ISBN 978 580 63726 ICS 35.110 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2013 Amendments/corrigenda issued since publication Date Text affected BS EN 50173-6:2013 EUROPEAN STANDARD EN 50173-6 NORME EUROPÉENNE September 2013 EUROPÄISCHE NORM ICS 35.110 English version Information technology Generic cabling systems Part 6: Distributed building services Technologies de l’information Systèmes de câblage générique Partie : Services distribués dans les bâtiments Informationstechnik Anwendungsneutrale Kommunikationskabelanlagen Teil 6: Verteilte Gebäudedienste This European Standard was approved by CENELEC on 2013-07-22 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels © 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50173-6:2013 E BS EN 50173-6:2013 EN 50173-6:2013 –2– Contents Foreword Introduction Scope and conformance 1.1 Scope 1.2 Conformance Normative references 10 Terms, definitions and abbreviations 10 3.1 Terms and definitions 10 3.2 Abbreviations 11 Structure of the generic cabling for distributed building services 11 4.1 General 11 4.2 Functional elements 12 4.3 General structure and hierarchy 12 4.4 Cabling subsystems 15 4.5 Accommodation of functional elements 16 4.6 Interfaces 18 4.7 Dimensioning and configuring 19 4.8 Relevant building services 23 Channel performance for generic cabling for distributed building services 23 5.1 General 23 5.2 Environmental performance 24 5.3 Transmission performance 24 Reference implementations for distributed building services 25 6.1 General 25 6.2 Balanced cabling 25 6.3 Optical fibre backbone cabling 30 Cable requirements 30 7.1 General 30 7.2 Balanced cables 30 7.3 Optical fibre cables 30 Connecting hardware requirements 30 8.1 General requirements 30 8.2 Connecting hardware for balanced cabling 31 8.3 Connecting hardware for optical fibre cabling 31 Requirements for cords and jumpers 31 9.1 Jumpers 31 9.2 Balanced cords 31 9.3 Optical fibre cords 32 Annex A (normative) Link performance limits 33 A.1 General 33 A.2 Balanced cabling 33 A.3 Optical fibre cabling 33 Annex B (informative) Services and applications 34 B.1 Introduction 34 B.2 Telecommunications – Wireless networks 34 B.3 Energy management 35 B.4 Environmental control 36 B.5 Personnel management 36 B.6 Personal information and alarms 37 Annex C (informative) Overlay 38 BS EN 50173-6:2013 –3– EN 50173-6:2013 C.1 Functional elements 38 C.2 General structure and hierarchy 38 Annex D (informative) Optical fibre within the Type B area feeder cabling subsystem 39 D.1 Overview 39 D.2 Implementation recommendations 39 Figures Figure — Schematic relationship between EN 50173 series and other relevant standards Figure Structure of Type A generic cabling 13 Figure Hierarchical structure of Type A generic cabling 13 Figure Structure of Type B generic cabling 14 Figure Hierarchical structure of Type B generic cabling 14 Figure Accommodation of functional elements 17 Figure Accommodation of TEs (Type B generic cabling) 17 Figure Test and equipment interfaces (Type A generic cabling) 18 Figure Test and equipment interfaces (Type B generic cabling) 18 Figure 10 Example of a Type A generic cabling system with combined BD and SD 20 Figure 11 Connection of functional elements providing redundancy for Type A generic cabling 20 Figure 12 Transmission performance of a service distribution channel 23 Figure 13 Example of a system showing the location of cabling interfaces 24 Figure 14 Service distribution cabling models 27 Figure A.1 Link options 33 Figure B.1 Wireless application coverage area grid 35 Figure D.1 Combined optical fibre backbone/horizontal channels 40 Tables Table — Contextual relationship between EN 50173 series and other standards relevant for information technology cabling systems Table – Maximum channel lengths for Type A reference implementations 21 Table – Maximum channel lengths for Type B reference implementations 22 Table – Service distribution channel formulae 29 Table B.1 – Supported wireless applications 34 Table B.2 – Areas served by SCPs 36 Table D.1 - Channel length formulae for optical fibre cabling 41 BS EN 50173-6:2013 EN 50173-6:2013 –4– Foreword This document (EN 50173-6:2013) has been prepared by CLC/TC 215, “Electrotechnical aspects of telecommunication equipment” The following dates are fixed: • latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-07-22 • latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2016-07-22 The European Standards EN 50173:1995 and EN 50173-1:2002 have been developed to enable the application-independent cabling to support ICT applications in office premises Their basic principles, however, are applicable to other types of applications and in other types of premises Therefore, CLC/TC 215 has established relevant European Standards which address the specific requirements of these premises In order to point out the commonalities of these cabling design standards, these European Standards are published as individual parts of the EN 50173 series, thus also acknowledging that standards users recognise the designation “EN 50173” as a synonym for generic cabling design At the time of publication of this European Standard, EN 50173 series comprises the following standards: EN 50173-1 Information technology – Generic cabling systems – Part 1: General requirements EN 50173-2 Information technology – Generic cabling systems – Part 2: Office premises EN 50173-3 Information technology – Generic cabling systems – Part 3: Industrial premises EN 50173-4 Information technology – Generic cabling systems – Part 4: Homes EN 50173-5 Information technology – Generic cabling systems – Part 5: Data centres EN 50173-6 Information technology – Generic cabling systems – Part 6: Distributed building services Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC shall not be held responsible for identifying any or all such patent rights BS EN 50173-6:2013 –5– EN 50173-6:2013 Introduction The importance of the information technology cabling infrastructure is similar to that of other utilities such as heating, lighting and electricity supplies As with other utilities, interruptions to service can have serious impact Poor quality of service due to lack of planning, use of inappropriate components, incorrect installation, poor administration or inadequate support can threaten an organisation's effectiveness Historically, the cabling within premises comprised both application-specific and multipurpose networks Standards within the EN 50173 series have enabled a controlled migration to generic cabling (with an associated reduction in the use of application-specific cabling) and supported the development of high data rate applications based upon defined cabling models This European Standard, EN 50173-6, specifies generic cabling that supports a wide range of communication services within premises that comprise single or multiple buildings on a campus It has been prepared to reflect the increasing use of generic cabling in support of non-user specific services, many of which require the use of remote powered devices including: I) telecommunications, e.g wireless access points; II) energy management, e.g lighting, power distribution, incoming utility metering; III) environmental control, e.g temperature, humidity; IV) personnel management, e.g access control, cameras, passive infra-red (PIR) detectors, time and attendance monitoring, electronic signage, audio-visual (AV) projectors; V) personal information and alarms, e.g paging, patient monitoring, nurse call, infant security The distribution of these services is provided: i) using the balanced cabling channel Classes of EN 50173-2 and the all-silica optical fibre cabling channel Classes of EN 50173-1; ii) to locations other than those specified by premises-specific standards in the EN 50173 series either as a stand-alone structure and configuration or as an overlay to an EN 50173 structure and configuration This European Standard is not intended to replace the application of other premises-specific standards in EN 50173 series but has been prepared in recognition of the fact that, although certain functional elements of service distribution cabling may be co-located with those of other generic cabling infrastructures, service distribution cabling may be: • specified, installed and operated by different entities than those responsible for other generic cabling infrastructures that may be installed within the premises; • specified and installed at a different time than other generic cabling infrastructures that may be installed within the premises This European Standard provides: a) users with an application independent generic cabling system and an open market for cabling components; b) users with a flexible cabling scheme such that modifications are both easy and economical; c) building professionals (for example, architects) with guidance allowing the accommodation of cabling before specific requirements are known; i.e in the initial planning either for construction or refurbishment; d) industry and standardization bodies with a cabling system which supports current products and provides a basis for future product development and applications standardization BS EN 50173-6:2013 EN 50173-6:2013 –6– This European Standard specifies multi-vendor cabling, and is related to: - standards for cabling components developed by Technical Committees of CENELEC and/or IEC; - standards for the quality assurance and installation of information technology cabling (EN 50174 series) and testing of installed cabling (EN 50346); - applications developed by the Technical Committees of IEC (including the subcommittees of ISO/IEC JTC 1) and study groups of ITU-T The applications listed in EN 50173-1:2011, Annex F, have been analysed to determine the requirements for a generic cabling system These requirements, together with statistics concerning premises geography from different countries and the models described in Clause 6, have been used to develop the requirements for cabling components and to stipulate their arrangement into cabling systems As a result, generic cabling defined within this European Standard is targeted at, but not limited to, office premises It is anticipated that the generic cabling system meeting the minimum requirements of this European Standard will have a life expectancy in excess of ten years Figure and Table show the schematic and contextual relationships between the standards produced by CLC/TC 215 for information technology cabling, namely: 1) this part and other parts of EN 50173 series; 2) application dependent cabling design (e.g EN 50098 series); 3) installation (EN 50174 series); 4) testing of installed cabling (EN 50346); 5) equipotential bonding requirements (EN 50310) In addition, a number of Technical Reports have been developed to support or extend the application of these standards, including: – CLC/TR 50173-99-1, Cabling guidelines in support of 10 GBASE-T; – CLC/TR 50173-99-2, Information technology – Implementation of BCT applications using cabling in accordance with EN 50173-4; – CLC/TR 50173-99-3, Information technology – Generic cabling systems – Part 99-3: Home cabling infrastructures up to 50 m in length to support simultaneous and non simultaneous provision of applications BS EN 50173-6:2013 –7– EN 50098-1: Customer premises cabling for information technology ISDN basic access EN 50173-6:2013 EN 50173-2: Information technology: Generic cabling - Office premises EN 50098-2: Customer premises cabling for information technology 2048 kbit/s ISDN primary access and leased line network interface EN 50173-3: Information technology: Generic cabling - Industrial premises EN 50173-4: Information technology: Generic cabling - Homes EN 50173-1: Information technology: Generic cabling - General requirements EN 50173-5: Information technology: Generic cabling - Data centres EN 50173-6: Information technology: Generic cabling – Distributed building services EN 50174-1: Information technology Cabling installation - Specification and quality assurance EN 50174-2: Information technology Cabling installation - Installation planning and practices inside buildings EN 50310: Application of equipotential bonding and earthing in buildings with information technology equipment EN 50174-3: Information technology Cabling installation - Installation planning and practices outside buildings EN 50346: Information technology Cabling installation Testing of installed cabling NOTE For the purposes of the standards in EN 50173 and EN 50174 series, the term “information technology” includes ICT, BCT and CCCB applications Figure — Schematic relationship between EN 50173 series and other relevant standards BS EN 50173-6:2013 EN 50173-6:2013 –8– Table — Contextual relationship between EN 50173 series and other standards relevant for information technology cabling systems Building design phase Generic cabling design phase Specification phase EN 50310 EN 50173 series except EN 50173-4 EN 50174-1 EN 50174-1 Requirements for specifying installations of information technology cabling 4: Requirements for specifying installations of information technology cabling Bonding networks 4: Structure 5: Channel performance 7: Cable requirements 8: Connecting hardware requirements Installation phase 5: Requirements for installers of information technology cabling 9: Requirements for cords and jumpers A: Link performance limits Planning phase and EN 50173-4 and 5: Structure 6: Channel performance 8: Cable requirements 9: Connecting hardware requirements 10: Requirements for cords and jumpers A: Link performance limits EN 50174-2 EN 50174-2 4: Requirements for planning installations of information technology cabling 5: Requirements for the installation of information technology cabling 6: Segregation of metallic information technology cabling and mains power cabling 7: Electricity distribution systems and lightning protection 6: Segregation of metallic information technology cabling and mains power cabling 8: Office (commercial) premises 9: Industrial premises 10: Homes 11: Data centres and EN 50174-3 and EN 50174-3 and (for equipotential bonding) EN 50310 and (for equipotential bonding) EN 50310 and EN 50346 4: General requirements 5: Test parameters for balanced cabling 6: Test parameters for optical fibre cabling Operation phase BS EN 50173-6:2013 EN 50173-6:2013 – 30 – 6.2.3.2 Dimensions The following general restrictions apply: a) the physical length of the channel between the equipment located in the SD and the terminal equipment shall not exceed 100 m; b) the physical length of the fixed area feeder cable: 1) shall not exceed 90 m; 2) should be at least 15 m in order to reduce the effect of multiple connections in close proximity on NEXT and return loss; c) the length of individual patch cords or jumpers at the SD shall not exceed m 6.2.4 Backbone cabling See EN 50173-1:2011 for reference implementations of Classes A to FA channels 6.3 Optical fibre backbone cabling See EN 50173-1:2011 for reference implementations of Classes OF-100, OF-300, OF-500 and OF-2000, OF-5000 and OF-10000 channels Cable requirements 7.1 General Clause defines the minimum requirements for: a) cables installed in the service distribution, area feeder and backbone cabling subsystems specified in Clause and used in the reference implementations of Clause 6; b) flexible balanced cables to be assembled as cords as specified in 9.2 and used in the reference implementations of Clause 6; c) balanced cables or cable elements to be used as jumpers 7.2 Balanced cables The electrical performance of balanced cables shall meet the Category 5, 6, 6A, or 7A requirements of EN 50173-1:2011, 7.3 7.3 Optical fibre cables See EN 50173-1:2011, 7.7.1 Connecting hardware requirements 8.1 General requirements In addition to those locations specified in EN 50173-1:2011, 8.1.2, connecting hardware is installed: a) at the SCP (if provided); b) at the SO BS EN 50173-6:2013 – 31 – EN 50173-6:2013 8.2 Connecting hardware for balanced cabling 8.2.1 General requirements See EN 50173-1:2011, 8.1 8.2.2 Electrical, mechanical and environmental performance 8.2.2.1 Connecting hardware at the SCP for Type A generic cabling The SCP shall be a fixed connector in accordance with EN 50173-1:2011, 8.2 and 8.6 Where required by the design or the environmental classification of the location, the protective housing shall meet the general requirements of this clause and the mechanical and physical requirements of EN 61076-3-106:2006, Variant 04 When two physically similar cabling links are used in the same installation (for example, different performance Categories and cables with different nominal impedance), special precautions are required to ensure that they are properly identified 8.2.2.2 Connecting hardware at the SO for Type A generic cabling For implementations of the SO as a plug-socket connection, the SO shall be a fixed connector in accordance with EN 50173-1:2011, 8.2 and 8.6 Where required by the design or the environmental classification of the location, the protective housing shall meet the general requirements of this clause and the mechanical and physical requirements of EN 61076-3-106:2006, Variant 04 When two physically similar cabling links are used in the same installation (for example, different performance Categories and cables with different nominal impedance), special precautions are required to ensure that they are properly identified 8.2.2.3 Connecting hardware at other locations See EN 50173-1:2011, D.3 Additionally, for reference implementations of Clause 6, see EN 50173-1:2011, 8.2 and 8.6 8.3 Connecting hardware for optical fibre cabling 8.3.1 General requirements See EN 50173-1:2011, 8.1 8.3.2 Optical, mechanical and environmental performance See EN 50173-1:2011, 8.5.1 Requirements for cords and jumpers 9.1 Jumpers See Clause 9.2 Balanced cords See EN 50173-1:2011, 9.3 BS EN 50173-6:2013 EN 50173-6:2013 9.3 Optical fibre cords See EN 50173-1:2011, 9.5 – 32 – BS EN 50173-6:2013 – 33 – EN 50173-6:2013 Annex A (normative) Link performance limits A.1 General Annex A contains performance requirement formulae for permanent links and SCP links as shown in Figure A.1, and relates to EN 50173-1:2011, Annex A The cabling under test in Configurations A, B and C is termed the permanent link: a) Configurations A and B comprise fixed cabling only b) Configuration C comprises fixed cabling and an SCP cable Measurements made for this configuration are invalid if the SCP cable is changed The cabling under test in Configuration D contains fixed cabling only and is termed the SCP link In all configurations, the test configuration reference plane of a link is within the test cord cable next to, and including, the test cord connection which mates to the termination point of the link under test Backbone cabling Tester C C C PP Service distribution cabling Tester Service distribution cabling Tester C Configuration A C Tester Configuration B C Tester Configuration C PP C C PP C C Tester SO C PP C C SCP SO Permanent link Service distribution cabling Tester C C C C Tester Configuration D SCP PP SCP link Figure A.1 Link options A.2 Balanced cabling Consideration should be given to measuring performance at worst case temperatures, or calculating worst case performance based on measurements made at other temperatures Link performance shall meet the requirements of EN 50173-1:2011, A.1 In the case of cable sharing, additional requirements shall be taken into account for balanced cabling The additional crosstalk requirements are specified in 7.2 A.3 Optical fibre cabling Link performance shall meet the requirements of EN 50173-1:2011, A.3.1 BS EN 50173-6:2013 EN 50173-6:2013 – 34 – Annex B (informative) Services and applications B.1 Introduction Annex B contains information to assist the implementation of cabling in accordance with this European Standard to support a range of diverse services In particular, Annex B provides recommendations in relation to the distribution, location and dimensioning of SCPs and SOs for specific services B.2 Telecommunications – Wireless networks B.2.1 General B.2 is applicable to, but not restricted to, the wireless applications listed in Table B.1 Table B.1 – Supported wireless applications Application Standard Description Typical indoor range (radius) IEEE 802.11 Wireless Local Area Networks (2 Mbit/s at 2,4 GHz or infrared) 30 m IEEE 802.11a Wireless Local Area Networks (54 Mbit/s at GHz) 12 m IEEE 802.11b Wireless Local Area Networks (11 Mbit/s at 2,4 GHz) 30 m IEEE 802.11g Wireless Local Area Networks (54 Mbit/s at 2,4 GHz) 12 m DECT Digital European Cordless Telephony (1 Mbit/s at 1,8 GHz) 30 m (ffs) Bluetooth II ISM Band Mbit/s at 2,4 GHz 12 m (ffs) Certain proprietary wireless equipment has a typical indoor range less than 12 m B.2.2 SO distribution to support wireless access points Wireless access points connected to an SO provide an interface to two distinct networking applications: a) an application supported by the cabling, as detailed in EN 50173-1:2011, Annex F; b) a wireless application serving a specific area To ensure the longevity of cabling intended to support wireless networks consideration should be given to installing cabling meeting the requirements of EN 50173-1:2011, Class EA, to meet the anticipated requirements for a backbone supporting data rates of 10 Gbit/s Operating range performance prediction provides valuable input for the determination of SO locations and should be performed and taken into account in the design of the service distribution cabling subsystem Similarly, a site survey should be performed prior to location selection and installation of wireless access points BS EN 50173-6:2013 – 35 – EN 50173-6:2013 Where multiple wireless access points are located to provide coverage areas that serve the same building space (e.g to provide additional bandwidth), it is necessary to provide multiple service distribution cabling channels to the SOs During planning, consideration of a logical boundary between areas served from different service distributors should be considered For example, such a boundary may be at a fixed structural boundary within the building or at areas that not require coverage As shown in Figure B.1: SOs that serve coverage areas in a uniform open space should be located to support a “honeycomb” or hexagonal wireless grid geometry; the number and placement of SOs should enable connections to a coverage area grid based on a maximum coverage area radius of 12 m; SOs should be centrally located in their associated coverage areas A "honeycomb” grid provides the most efficient coverage Other grid shapes, such as squares or rectangles may be used Ceiling height should be considered when designing the coverage area grid to be served by the horizontal cabling For example, placement of wireless access points on ceilings that exceed a m height may result in a lower coverage area radius at floor height Wall SO SO SO SO Wireless access point coverage area SO SO r ≤ 12 m SO SO SO SO SO SO Wall Figure B.1 Wireless application coverage area grid B.3 Energy management B.3.1 Lighting control Under consideration B.3.2 Power distribution Under consideration BS EN 50173-6:2013 EN 50173-6:2013 B.3.3 – 36 – Incoming utility metering Under consideration B.3.4 SCP distribution The location of SCPs for each service should take into account the areas to be served with reference to Table B.2 Table B.2 – Areas served by SCPs Notes Premises/areas Area served by a SCP Plant room 5m Dedicated office 25 m Retail 25 m Personnel management services may require reduction in the area served Hotel 25 m Area served may vary if service is centrally managed Hospital 25 m Average value only: each type of hospital environment should be specifically designed Classroom 25 m Average value only: each type of classroom environment should be specifically designed Area served may vary if service is centrally managed Indoor parking 25 m Industrial (factory) 50 m a Plant rooms contain air handlers, chillers, boilers, pumps, fans, compressors etc Air handlers will typically require a higher density of SOs The area served in open office areas may be greater than 25 m Area served may depend upon manufacturing process, environment and building design The area served by the SCP should comprise either a room with an area not greater than that specified or an area not greater than that specified within a larger room/space B.4 Environmental control B.4.1 Temperature Under consideration B.4.2 Humidity Under consideration B.4.3 SCP distribution See B.3.4 B.5 Personnel management B.5.1 Access control Under consideration BS EN 50173-6:2013 – 37 – B.5.2 Cameras Under consideration B.5.3 Time and attendance monitoring Under consideration B.5.4 Electronic signage Under consideration B.5.5 AV projectors Under consideration B.5.6 SCP distribution See B.3.4 In addition, two SCPs should be installed to serve each side of a building B.6 Personal information and alarms B.6.1 Paging Under consideration B.6.2 Patient monitoring Under consideration B.6.3 Nurse call Under consideration B.6.4 Infant security Under consideration B.6.5 SCP distribution See B.3.4 EN 50173-6:2013 BS EN 50173-6:2013 EN 50173-6:2013 – 38 – Annex C (informative) Overlay C.1 Functional elements C.1.1 Type A generic cabling Type A generic cabling from the SD to the SO is logically equivalent to that: a) from the FD to the TO in EN 50173-2; b) from the ID to the TO in EN 50173-3; c) from the HD (or SHD) to the TO in EN 50173-4; d) from the ZD to the EO in EN 50173-5 The SCP is logically equivalent to: 1) the CP in EN 50173-2; 2) the LDP in EN 50173-5 C.1.2 Type B generic cabling Type B generic cabling from the SD to the SCP is logically equivalent to that: a) from the FD to the CP in EN 50173-2; b) from the HD (or SHD) to the ACP in EN 50173-4; c) from the ZD to the LDP in EN 50173-5 C.2 General structure and hierarchy C.2.1 Type A generic cabling The overlay structure depends upon the premises-specific design standard with which the distributed building services cabling is to be integrated The service distribution cabling described in 4.4.3 is the logical equivalent of the: a) horizontal cabling in EN 50173-2; b) intermediate cabling in EN 50173-3; c) home cabling (or secondary home cabling) for ICT cabling in EN 50173-4; d) zone distribution cabling in EN 50173-5 C.2.2 Type B generic cabling The overlay structure depends upon the premises-specific design standard with which the distributed building services cabling is to be integrated The area feeder cabling described in 4.4.4 is the logical equivalent of the area feeder cabling for CCCB applications in EN 50173-4 BS EN 50173-6:2013 – 39 – EN 50173-6:2013 Annex D (informative) Optical fibre within the Type B area feeder cabling subsystem D.1 Overview The opportunity to install equipment at the SCP offers the possibility of installing optical fibre cabling from the SD to the SCP and using the equipment installed at the SCP to perform opto-electronic conversion to balanced or other cabling as required While technically possible, the pre-installation of optical fibre only in the area feeder cabling subsystem would represent a considerable restriction of flexibility and cannot be considered to provide generic application support However, if an appropriate risk analysis has been undertaken then the recommendations of D.2 should be applied to implement an effective solution D.2 Implementation recommendations D.2.1 Channel performance Cabling should be designed using the cabled optical fibre Categories referenced in D.2.2 to provide channel performance as required from Classes OF-100, OF-300, OF-500, OF-2000, OF-5000 and OF-10000 as specified in EN 50173-1:2011 D.2.2 Reference implementation Optical fibre components are referenced in D.2.3, D.2.4 and D.2.5 The optical fibres are defined in terms of physical construction (core/cladding diameter) and their transmission performance Category within a cable Within the reference implementations of this clause, the optical fibres used in each cabling channel should have the same physical construction specification and the cabled optical fibres should be of the same Category When more than one physical construction or cabled optical fibre Category is used in a cabling subsystem, the cabling should be marked to allow each cabling type to be clearly identified The selection of optical fibre components should be determined by the channel lengths required and the applications to be supported Refer to EN 50173-1:2011, Annex F, for guidance The models of Figure D.1 are applicable to optical fibre cabling within the area feeder cabling subsystem It should be noted that the connection systems used to terminate fixed optical cabling may contain mated connections and splices (permanent or re-useable) and that cross-connects may comprise re-useable splices BS EN 50173-6:2013 EN 50173-6:2013 – 40 – Channel Backbone cable BD EQP C Area feeder cable SD C C C C C EQP C SCP Area feeder cord Patch cord/ jumper Equipment Patch cord/ cord Jumper a) “Patched” combined channel Channel Backbone cable BD EQP C Area feeder cable SD C C C S C EQP SCP Area feeder cord Patch cord/ jumper Equipment Patch cord/ cord Jumper b) “Spliced” combined channel Channel Comboined backbone/area feeder cable BD EQP C SD C C C C EQP SCP Area feeder cord Equipment Patch cord/ cord Jumper c) “Direct” combined channel Figure D.1 Combined optical fibre backbone/horizontal channels In order to accommodate differing quantities of mated connections and splices of the cables used within a channel of a given Class of D.2.1, the total channel length should be determined by the formulae shown in Table D.1 NOTE The formulae of Table D.1 may not support the implementation of all the channel configurations shown in Figure D.1 The number and overall attenuation of connections and splices may be restricted by application standards BS EN 50173-6:2013 – 41 – EN 50173-6:2013 Table D.1 - Channel length formulae for optical fibre cabling Cabled optical fibre Class Implementation formulae Category Wavelength Multimode Maximum length m 850 nm 300 nm OF-100 L= 535 − 214 × x − 90 × y = L 1100 − 500 × x − 200 × y 100 OM1/ OF-300 L= 735 − 214 × x − 90 × y = L 300 − 500 × x − 200 × y 300 OM2/OM3/OM4 OF-500 L= 935 − 214 × x − 90 × y = L 500 − 500 × x − 200 × y 500 OF-2000 = L 435 − 214 × x − 90 × y = L 000 − 500 × x − 200 × y 000 310 nm 550 nm OF-300 L = 800 − 750 × x − 300 × y L = 800 − 750 × x − 300 × y 300 OF-500 L= 000 − 750 × x − 300 × y L= 000 − 750 × x − 300 × y 500 OF-2000 L= 500 − 750 × x − 300 × y L= 500 − 750 × x − 300 × y 000 OF-300 = L 500 − 875 × x − 750 × y = L 500 − 875 × x − 750 × y 300 OF-500 = L 000 − 875 × x − 750 × y = L 000 − 875 × x − 750 × y 500 OF-2000 = L 750 − 875 × x − 750 × y = L 750 − 875 × x − 750 × y 000 OF-5000 = L 10 000 − 875 × x − 750 × y = L 10 000 − 875 × x − 750 × y 000 OF-10000 = L 15 000 − 875 × x − 750 × y = L 15 000 − 875 × x − 750 × y 10 000 Singlemode OS1 OS2 Key L = the length of the channel (m) x = total number of mated connections in the channel y = total number of splices in the channel Additional connections/splices may be used if the maximum channel insertion loss (or optical power budget, as applicable) of the application allows (see EN 50173-1:2011, Annex F) D.2.3 Cables See EN 50173-1:2011, 7.7.1 D.2.4 Connecting hardware See EN 50173-1:2011, 8.1 and 8.5.1 D.2.5 Cords See EN 50173-1:2011, 9.5 BS EN 50173-6:2013 EN 50173-6:2013 – 42 – Bibliography CLC/TR 50173-99-1, Cabling guidelines in support of 10 GBASE-T CLC/TR 50173-99-2, Information technology — Implementation of BCT applications using cabling in accordance with EN 50173-4 CLC/TR 50173-99-3, Information technology — Generic cabling systems — Part 99-3: Home cabling infrastructures up to 50 m in length to support simultaneous and non simultaneous provision of applications EN 50098-1:1998 + A1:2002, Customer premises cabling for Information Technology — Part 1: ISDN basic access EN 50098-2, Customer premises cabling for Information Technology — Part 2: 2048 kbit/s ISDN primary access and leased line network interface EN 50173-2:2007+A1:2010+AC:2011, Information technology — Generic cabling systems — Part 2: Office premises EN 50173-3:2007+A1:2010+AC:2011, Information technology — Generic cabling systems — Part 3: Industrial premises EN 50173-4:2007+A1:2010+AC:2011+A2:2012, Information technology — Generic cabling systems — Part 4: Homes EN 50173-5:2007+A1:2010+AC:2011+A2:2012, Information technology — Generic cabling systems — Part 5: Data centres EN 50288 (series), Multi-element metallic cables used in analogue and digital communication and control EN 50310, Application of equipotential bonding and earthing in buildings with information technology equipment EN 50346:2002+A1:2007+A2:2009, Information technology — Cabling installation — Testing of installed cabling This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to 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