1、 TIA/EIA STANDARD Commercial Building Telecommunications Cabling Standard Part 1: General Requirements TIA/EIA-568-B.1 (Revision of TIA/EIA-568-A) MAY 2001 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Telecommunications Industry Association represents the communications sector of ANSI/TIA/EIA-568-B.1
2、-2001 Approved: April 12, 2001 TIA/EIA-568-B.1Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NOTICE TIA/EIA Engineering Standards and Publications are designed to serve the public inter
3、est through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publicati
4、ons shall not in any respect preclude any member or nonmember of TIA/EIA from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than TIA/EIA members, whether the
5、standard is to be used either domestically or internationally. Standards and Publications are adopted by TIA/EIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA/EIA does not assume any liability to any patent owner, nor does it assume any obliga
6、tion whatever to parties adopting the Standard or Publication. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices a
7、nd to determine the applicability of regulatory limitations before its use. (From Standards Proposal Nos.4425-B, 4425-B-1 and 4425-B-2, formulated under the cognizance of the TIA TR-42 Committee on User Premises Telecommunications Infrastructure.) Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION
8、 2001 Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 22201 PRICE: Please refer to current Catalog of EIA ELECTRONIC INDUSTRIES ALLIANCE STANDARDS and ENGINEERING PUBLICATIONS or call Global Engineering Documents, USA and Canada (1-800-854-7179) International (303-397-7956) A
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11、7-7956 Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitte
12、d without license from IHS-,-,-TIA/EIA-568-B.1 i Commercial Building Telecommunications Cabling Standard; Part 1: General Requirements Table of Contents FOREWORD .vi 1 INTRODUCTION 1 1.1 Purpose 1 1.2 Specification of criteria1 1.3 Metric equivalents of US customary units .1 1.4 Life of this Standar
13、d1 1.5 Telecommunications cabling system structure2 2 Scope. 4 2.1 Normative references 4 3 DEFINITION OF TERMS, ACRONYMS AND ABBREVIATIONS, AND UNITS OF MEASURE 6 3.1 General .6 3.2 Definition of terms 6 3.3 Acronyms and abbreviations11 3.4 Units of measure12 4 HORIZONTAL CABLING 14 4.1 General .14
14、 4.2 Topology .14 4.3 Horizontal distances .15 4.4 Recognized cables .16 4.5 Choosing types of cabling .16 4.6 Grounding considerations17 5 BACKBONE CABLING. 18 5.1 General .18 5.2 Topology .18 5.2.1 Star topology 18 5.2.2 Accommodation of non-star configurations .19 5.2.3 Cabling directly between t
15、elecommunications rooms 19 5.3 Recognized cables .20 5.4 Choosing media .20 5.5 Backbone cabling distances21 5.5.1 Intra and interbuilding distances 21 Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license
16、 from IHS-,-,-TIA/EIA-568-B.1 ii 5.5.2 Main cross-connect to entrance facility22 5.5.3 Cross-connections.23 5.5.4 Cabling to telecommunications equipment .23 5.6 Grounding and bonding considerations .23 6 WORK AREA. 24 6.1 General .24 6.2 Telecommunications outlet/connector 24 6.2.1 100-Ohm balanced
17、 twisted-pair telecommunications outlet/connector.24 6.2.2 Optical fiber telecommunications outlet connector 25 6.3 Work area cords 25 6.4 Open office cabling.26 6.4.1 Multi-user telecommunications outlet assembly .26 6.4.1.1 Application planning26 6.4.1.2 Installation practices .26 6.4.1.3 Administ
18、ration 27 6.4.1.4 Maximum lengths for copper cabling.27 6.4.1.5 Horizontal distances of optical fiber links (long work area cables)28 6.4.2 Consolidation point 28 6.4.2.1 Application planning28 6.4.2.2 Installation practices .29 6.4.2.3 Administration 29 7 TELECOMMUNICATIONS ROOMS. 30 7.1 General .3
19、0 7.2 Design 30 7.3 Functions 30 7.4 Cross-connections and interconnections 30 8 EQUIPMENT ROOMS 32 8.1 General .32 8.2 Design 32 8.3 Functions 32 8.4 Cabling practices .32 9 ENTRANCE FACILITIES 33 9.1 General .33 9.2 Design 33 9.3 Functions 33 9.3.1 Network demarcation point .33 9.3.2 Electrical pr
20、otection.33 9.3.3 Bonding and grounding.33 9.3.4 Entrance facility connections 33 10 CABLING INSTALLATION REQUIREMENTS 34 10.1 General34 10.1.1 Placement of horizontal and backbone cables 34 Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction
21、or networking permitted without license from IHS-,-,-TIA/EIA-568-B.1 iii 10.2 Balanced 100-ohm twisted-pair cabling (UTP and ScTP).34 10.2.1 Minimum bend radius.34 10.2.1.1 Minimum horizontal cable bend radius 34 10.2.1.2 Minimum backbone cable bend radius 34 10.2.1.3 Minimum patch cable bend radius
22、 34 10.2.2 Maximum pulling tension34 10.2.3 Connecting hardware termination 34 10.2.4 Patch cords, equipment cords, work area cords, and jumpers .35 10.2.5 100-Ohm ScTP grounding requirements.35 10.3 Optical fiber cabling 35 10.3.1 Minimum bend radius and maximum pulling tension .35 10.3.2 Connectin
23、g hardware termination and polarity.35 10.3.3 Patch cords, equipment cords and work area cords 37 10.4 150-Ohm shielded twisted-pair cabling38 10.4.1 Minimum bend radius.38 10.4.2 Maximum pulling tension38 10.4.3 Connecting hardware termination 38 11 CABLING TRANSMISSION PERFORMANCE AND TEST REQUIRE
24、MENTS 39 11.1 General39 11.2 100-Ohm twisted-pair transmission performance and field test requirements.39 11.2.1 Purpose and scope39 11.2.2 Applicability 39 11.2.3 Test configurations 39 11.2.4 Test parameters 41 11.2.4.1 General41 11.2.4.2 Wire map.42 11.2.4.3 Length.43 11.2.4.3.1 Physical length v
25、s. electrical length 43 11.2.4.3.2 Length requirements43 11.2.4.4 Insertion loss43 11.2.4.5 Pair-to-pair NEXT loss .45 11.2.4.6 PSNEXT loss .46 11.2.4.7 Pair-to Pair ELFEXT and FEXT loss parameters.47 11.2.4.8 Cabling PSELFEXT .49 11.2.4.9 Cabling return loss51 11.2.4.10 Propagation delay52 11.2.4.1
26、1 Delay skew.52 11.3 Optical fiber transmission performance and test requirements.52 11.3.1 Purpose52 11.3.2 Link segment 53 11.3.3 Link segment performance .53 11.3.3.1 Horizontal link measurement54 11.3.3.2 Backbone link measurement54 11.3.3.3 Centralized optical fiber link measurement 55 11.3.3.4
27、 Link attenuation equation and graphs55 ANNEX A (NORMATIVE) CENTRALIZED OPTICAL FIBER CABLING. 58 A.1 Introduction58 A.2 Applicability.58 Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
28、TIA/EIA-568-B.1 iv A.3 General guidelines58 ANNEX B (INFORMATIVE) SHARED SHEATH GUIDELINES FOR MULTIPAIR UTP CABLES 61 B.1 General .61 B.2 Shared sheath guidelines 61 ANNEX C (INFORMATIVE) OTHER CABLE SPECIFICATIONS. 62 C.1 General .62 C.2 Horizontal cabling.62 C.2.1 Multipair 100-ohm twisted-pair c
29、ables 62 C.2.2 75-Ohm coaxial cable 63 C.2.3 50-Ohm coaxial cable 63 C.3 Backbone cabling.63 C.3.1 100-Ohm STP cable 63 C.3.2 Other multimode optical fiber cables63 C.3.3 75-Ohm coaxial cable 63 C.3.4 50-Ohm coaxial cable 63 ANNEX D (INFORMATIVE) CATEGORY 5 CABLING TRANSMISSION 64 D.1 General .64 D.
30、2 Measurement precautions .64 D.3 Test configurations .64 D.4 Test parameters .65 D.4.1 Wire map65 D.4.2 Length65 D.4.3 Insertion loss 65 D.4.4 Pair-to-pair NEXT loss65 D.4.5 Cabling return loss.67 D.4.6 Channel and basic link pair-to-pair ELFEXT 68 D.4.7 Channel and basic link PSELFEXT69 D.4.8 Prop
31、agation delay69 D.4.9 Delay skew.69 D.4.10 Cabling (field) measurement procedures .69 D.4.10.1 Test equipment cords and connectors 69 D.4.11 Field failure mitigation procedures 70 ANNEX E (INFORMATIVE) OPTICAL FIBER APPLICATIONS SUPPORT INFORMATION. 71 E.1 General .71 E.2 Supportable distances and c
32、hannel attenuation.71 ANNEX F (INFORMATIVE) BIBLIOGRAPHY 75 List of Tables Table 6-1 Maximum length of horizontal and work area cables 27 Table 11-1 Insertion loss 20 C for channel test configuration 44 Table 11-2 Insertion loss 20 C for permanent link test configuration 44 Copyright Electronic Indu
33、stries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-568-B.1 v Table 11-3 Pair-to-pair NEXT loss for channel test configuration (worst pair-to-pair) . 45 Table 11-4 Pair-to-pair NEXT loss for permanent link t
34、est configuration (worst pair-to-pair) . 46 Table 11-5 Category 5e channel PSNEXT loss 47 Table 11-6 Category 5e permanent link PSNEXT loss 47 Table 11-7 Category 5e channel pair-to-pair ELFEXT, worst pair-to-pair 48 Table 11-8 Category 5e permanent link pair-to-pair ELFEXT, worst pair-to-pair 48 Ta
35、ble 11-9 Category 5e channel PSELFEXT 49 Table 11-10 Category 5e permanent link PSELFEXT 49 Table 11-11 Category 5e channel return loss. 51 Table 11-12 Category 5e channel return loss. 51 Table 11-13 Category 5e permanent link return loss. 52 Table 11-14 Category 5e permanent link return loss. 52 Ta
36、ble 11-15 Mandrel diameters for multimode optical fiber core sizes 54 Table D-1 Category 5 insertion loss 20 C for basic link test configuration. 63 Table D-2 Category 5 pair-to-pair NEXT loss for channel test configuration (worst pair-to-pair) 64 Table D-3 Category 5 pair-to-pair NEXT loss for basi
37、c link test configuration (worst pair-to-pair) . 64 Table D-4 Category 5 channel return loss. 65 Table D-5 Category 5 channel return loss representative values 65 Table D-6 Category 5 basic link return loss 66 Table D-7 Category 5 basic link return loss representative values . 66 Table D-8 Category
38、5 channel and basic link ELFEXT, worst pair-to-pair . 66 Table D-9 Category 5 channel and basic link PSELFEXT . 67 Table E-1 Supported distances and channel attenuation for optical fiber applications by fiber type . 70 Part 2: Balanced Twisted-Pair Cabling Components (ANSI/TIA/EIA-568-B.2) Optical F
39、iber Cabling Components Standard (ANSI/TIA/EIA-568-B.3) Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-568-B.1 viii This Standard is one of a series of technical standards that
40、address building cabling for telecommunications products and services. These series of standards include: Commercial Building Standard for Telecommunications Pathways and Spaces (ANSI/TIA/EIA-569-A) Residential Telecommunications Cabling Standard (ANSI/TIA/EIA-570-A) Administration Standard for the
41、Telecommunications Infrastructure of Commercial Buildings (ANSI/TIA/EIA-606) Commercial Building Grounding and Bonding Requirements for Telecommunications (ANSI/TIA/EIA-607) Customer-Owned Outside Plant Telecommunications Cabling Standard (ANSI/TIA/EIA-758) This Standard contains references to natio
42、nal and international standards. Where appropriate, international standards are used. The following documents may be useful to the reader: National Electrical Safety Code (NESC) (IEEE C 2) National Electrical Code (NEC) (NFPA 70) Useful supplements to this Standard are the Building Industry Consulti
43、ng Service International (BICSI) Telecommunications Distribution Methods Manual, the Customer-owned Outside Plant Design Manual, and the Telecommunications Cabling Installation Manual. These manuals provide recommended practices and methods by which many of the requirements of this Standard may be i
44、mplemented. Other references are listed in annex F. Annex A is normative and considered a mandatory part of this Standard. Annexes B through F are informative and not considered to be requirements of this Standard. Copyright Electronic Industries Alliance Provided by IHS under license with EIANot fo
45、r ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-568-B.1 1 1 INTRODUCTION 1.1 Purpose This Standard specifies a generic telecommunications cabling system for commercial buildings that will support a multi-product, multi-vendor environment. It also provides informa
46、tion that may be used for the design of telecommunications products for commercial enterprises. The purpose of this Standard is to enable the planning and installation of a structured cabling system for commercial buildings. Installation of cabling systems during building construction or renovation
47、is significantly less expensive and less disruptive than after the building is occupied. This Standard establishes performance and technical criteria for various cabling system configurations for accessing and connecting their respective elements. In order to determine the requirements of a generic
48、cabling system, performance requirements for various telecommunications services were considered. The diversity of services currently available, coupled with the continual addition of new services, means that there may be cases where limitations to desired performance occur. When applying specific a
49、pplications to these cabling systems, the user is cautioned to consult application standards, regulations, equipment vendors, and system and service suppliers for applicability, limitations, and ancillary requirements. 1.2 Specification of criteria In accordance with EIA Engineering Publication, EP-7B, two categories of criteria are specified; mandatory and advisory. The mandatory
