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Norma Cableado Estructurado Tia-Eia-568

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TIA/EIA-568-B.1

Commercial Building Telecommunications Cabling Standard; Part 1: General Requirements

Table of Contents

FOREWORD ........................................................................................................................... vi 1 INTRODUCTION .............................................................................................................. 1

1.1 1.2 1.3 1.4 1.5 Purpose ..........................................................................................................................1 Specification of criteria......................................................................................................1 Metric equivalents of US customary units ...........................................................................1 Life of this Standard..........................................................................................................1 Telecommunications cabling system structure....................................................................2

2

Scope................................................................................................................................. 4

2.1 Normative references ........................................................................................................4

3 DEFINITION OF TERMS, ACRONYMS AND ABBREVIATIONS, AND UNITS OF MEASURE ................................................................................................................................ 6

3.1 3.2 3.3 3.4 General ...........................................................................................................................6 Definition of terms ............................................................................................................6 Acronyms and abbreviations............................................................................................ 11 Units of measure............................................................................................................ 12

4

HORIZONTAL CABLING................................................................................................ 14

4.1 4.2 4.3 4.4 4.5 4.6 General ......................................................................................................................... 14 Topology ....................................................................................................................... 14 Horizontal distances ....................................................................................................... 15 Recognized cables ......................................................................................................... 16 Choosing types of cabling ............................................................................................... 16 Grounding considerations................................................................................................ 17

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 telecommunications rooms .................................................. 19 5.3 5.4 Recognized cables ......................................................................................................... 20 Choosing media ............................................................................................................. 20

5.5 Backbone cabling distances............................................................................................ 21 5.5.1 Intra and interbuilding distances ................................................................................ 21

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5.5.2 5.5.3 5.5.4 5.6

Main cross-connect to entrance facility...................................................................... 22 Cross-connections................................................................................................... 23 Cabling to telecommunications equipment ................................................................. 23

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 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 planning.......................................................................................... 26 6.4.1.2 Installation practices ......................................................................................... 26 6.4.1.3 Administration .................................................................................................. 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 planning.......................................................................................... 28 6.4.2.2 Installation practices ......................................................................................... 29 6.4.2.3 Administration .................................................................................................. 29

7

TELECOMMUNICATIONS ROOMS............................................................................. 30

7.1 7.2 7.3 7.4 General ......................................................................................................................... 30 Design .......................................................................................................................... 30 Functions ...................................................................................................................... 30 Cross-connections and interconnections .......................................................................... 30

8

EQUIPMENT ROOMS.................................................................................................... 32

8.1 8.2 8.3 8.4 General ......................................................................................................................... 32 Design .......................................................................................................................... 32 Functions ...................................................................................................................... 32 Cabling practices ........................................................................................................... 32

9

ENTRANCE FACILITIES ................................................................................................ 33

9.1 9.2 General ......................................................................................................................... 33 Design .......................................................................................................................... 33

9.3 Functions ...................................................................................................................... 33 9.3.1 Network demarcation point ....................................................................................... 33 9.3.2 Electrical protection................................................................................................. 33 9.3.3 Bonding and grounding............................................................................................. 33 9.3.4 Entrance facility connections .................................................................................... 33

10

CABLING INSTALLATION REQUIREMENTS.......................................................... 34

10.1 General...................................................................................................................... 34 10.1.1 Placement of horizontal and backbone cables ............................................................ 34

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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 ...................................................................... 34 10.2.2 Maximum pulling tension.......................................................................................... 34 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 Connecting hardware termination and polarity............................................................. 35 10.3.3 Patch cords, equipment cords and work area cords .................................................... 37 10.4 150-Ohm shielded twisted-pair cabling.......................................................................... 38 10.4.1 Minimum bend radius............................................................................................... 38 10.4.2 Maximum pulling tension.......................................................................................... 38 10.4.3 Connecting hardware termination .............................................................................. 38

11

11.1

CABLING TRANSMISSION PERFORMANCE AND TEST REQUIREMENTS ...... 39

General...................................................................................................................... 39

11.2 100-Ohm twisted-pair transmission performance and field test requirements..................... 39 11.2.1 Purpose and scope.................................................................................................. 39 11.2.2 Applicability ............................................................................................................ 39 11.2.3 Test configurations .................................................................................................. 39 11.2.4 Test parameters ...................................................................................................... 41 11.2.4.1 General............................................................................................................ 41 11.2.4.2 Wire map......................................................................................................... 42 11.2.4.3 Length............................................................................................................. 43 11.2.4.3.1 Physical length vs. electrical length .............................................................. 43 11.2.4.3.2 Length requirements.................................................................................... 43 11.2.4.4 Insertion loss.................................................................................................... 43 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 loss............................................................................................ 51 11.2.4.10 Propagation delay............................................................................................ 52 11.2.4.11 Delay skew..................................................................................................... 52 11.3 Optical fiber transmission performance and test requirements......................................... 52 11.3.1 Purpose.................................................................................................................. 52 11.3.2 Link segment .......................................................................................................... 53 11.3.3 Link segment performance ....................................................................................... 53 11.3.3.1 Horizontal link measurement.............................................................................. 54 11.3.3.2 Backbone link measurement.............................................................................. 54 11.3.3.3 Centralized optical fiber link measurement .......................................................... 55 11.3.3.4 Link attenuation equation and graphs.................................................................. 55

ANNEX A (NORMATIVE) CENTRALIZED OPTICAL FIBER CABLING............................. 58

A.1 A.2 Introduction.................................................................................................................... 58 Applicability................................................................................................................... 58

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A.3

General guidelines.......................................................................................................... 58

ANNEX B (INFORMATIVE) SHARED SHEATH GUIDELINES FOR MULTIPAIR UTP CABLES.................................................................................................................................. 61

B.1 B.2 General ......................................................................................................................... 61 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 cables ........................................................................ 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 cables.......................................................................... 63 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 D.2 D.3 General ......................................................................................................................... 64 Measurement precautions ............................................................................................... 64 Test configurations ......................................................................................................... 64

D.4 Test parameters ............................................................................................................. 65 D.4.1 Wire map................................................................................................................ 65 D.4.2 Length.................................................................................................................... 65 D.4.3 Insertion loss .......................................................................................................... 65 D.4.4 Pair-to-pair NEXT loss.............................................................................................. 65 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 PSELFEXT............................................................................ 69 D.4.8 Propagation delay.................................................................................................... 69 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 E.2 General ......................................................................................................................... 71 Supportable distances and channel 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

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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 test 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 Table 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 Table 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 basic 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 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 & 71 Table E-2 Maximum cable attenuation coefficient .................................................................... 72

List of Figures

Figure 1-1 Typical telecommunications cabling system.............................................................. 3 Figure 4-1 Typical horizontal and work area cabling using a star topology .................................. 15 Figure 5-1 Backbone hierarchical star topology ....................................................................... 19 Figure 5-2 Backbone distances.............................................................................................. 22 Figure 6-1 Eight-position jack pin/pair assignments (T568A)..................................................... 24 Figure 6-2 Optional eight-position jack pin/pair assignment (T568B) .......................................... 25 Figure 6-3 Application of multi-user telecommunications outlet assembly .................................. 26 Figure 6-4 Application of consolidation point............................................................................ 28 Figure 7-1 Illustration of interconnection and cross-connection schemes.................................... 31 Figure 10-1 Specified optical fiber cabling for proper polarity (wall-mount hardware shown)........... 36 Figure 10-2 Optical fiber cabling plan for premises cabling........................................................ 37 Figure 10-3 568SC optical fiber patch cord.............................................................................. 37 Figure 11-1 Schematic representation of a channel test configuration ........................................ 40 Figure 11-2 Schematic representation of a permanent link test configuration .............................. 41 Figure 11-3 Correct pairing .................................................................................................... 42 Figure 11-4 Incorrect pairing .................................................................................................. 42 Figure 11-5 Optical fiber passive link ...................................................................................... 53 Figure 11-6 62.5/125 µm or 50/125 µm backbone cabling link attenuation based on distance....... 56 Figure 11-7 Singlemode backbone cabling link attenuation based on distance............................ 57 Figure A-1 Centralized optical fiber cabling 57 Figure C-1 Multipair cable configuration 60 Figure D-1 Schematic representation of a basic link test configuration 62

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TIA/EIA-568-B.1

FOREWORD

(This foreword is not considered part of this Standard.)

Approval of this Standard

This Standard was approved by TIA/EIA Subcommittee TR-42.1, TIA/EIA Engineering Committee TR-42, and the American National Standards Institute (ANSI). ANSI/TIA/EIA reviews standards every 5 years. At that time, standards are reaffirmed, rescinded, or revised according to the submitted updates. Updates to be included in the next revision should be sent to the committee chair or to ANSI/TIA/EIA.

Contributing organizations

More than 60 organizations within the telecommunications industry contributed their expertise to the development of this Standard (including manufacturers, consultants, end users, and other organizations). Early in 1985, a large number of companies representing the telecommunications and computer industry expressed concern over the lack of a standard for building telecommunications cabling systems. The Computer Communications Industry Association (CCIA) asked the Electronic Industries Alliance (EIA) (formerly Association) to undertake the task of developing the required standard. EIA accepted the task and the project was assigned to Engineering Committee TR-42 (formerly TR-41.8). The TR-42 Committee contains the following subcommittees that are related to this activity. • • • • • • • • • TR-42.1 - Subcommittee on Commercial Building Telecommunications Cabling TR-42.2 - Subcommittee on Residential Telecommunications Infrastructure TR-42.3 - Subcommittee on Commercial Building Telecommunications Pathways and Spaces TR-42.4 - Subcommittee on Outside Plant Telecommunications Infrastructure TR-42.5 - Subcommittee on Telecommunications Infrastructure Terms and Symbols TR-42.6 - Subcommittee on Telecommunications Infrastructure and Equipment Administration TR-42.7 - Subcommittee on Telecommunications Copper Cabling Systems TR-42.8 - Subcommittee on Telecommunications Optical Fiber Cabling Systems TR-42.9 - Subcommittee on Industrial Telecommunications Infrastructure

Documents superseded

This Standard replaces ANSI/TIA/EIA-568-A dated October 6, 1995. Since the original publication of ANSI/EIA/TIA-568 in July of 1991, the office environment has undergone a period of rapid change marked by the growth of increasingly powerful personal computers, the access to more sophisticated applications and the need to interconnect different systems. These changes place increased demands on the transmission capacity of premises cabling. This trend has led to the development of twisted-pair cables, optical fiber cables, and corresponding compatible connecting hardware with enhanced transmission characteristics.

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This Standard incorporates and refines the technical content of: • • • • • • • • • • TIA/EIA TSB67, Transmission Performance Specifications for Field Testing of Unshielded Twisted-Pair Cabling Systems TIA/EIA TSB72, Centralized Optical Fiber Cabling TIA/EIA TSB75, Additional Horizontal Cabling Practices for Open Offices TIA/EIA TSB95, Additional Transmission Performance Guidelines for 4-Pair 100 Ω Category 5 Cabling ANSI/TIA/EIA-568-A-1, Propagation Delay and Delay Skew Specifications for 100 Ω 4-Pair Cable ANSI/TIA/EIA-568-A-2, Corrections and Additions to TIA/EIA-568-A ANSI/TIA/EIA-568-A-3, Addendum No. 3 to TIA/EIA-568-A ANSI/TIA/EIA-568-A-4, Production Modular Cord NEXT Loss Test Method and Requirements for Unshielded Twisted-Pair Cabling ANSI/TIA/EIA-568-A-5, Transmission Performance Specifications for 4-Pair 100 Ω Category 5e Cabling TIA/EIA/IS-729, Technical Specifications for 100 Ω Screened Twisted-Pair Cabling

Significant technical changes from the previous edition

• • • • • • • • • This foreword has been changed per the requirements of the TIA Style Manual. Reorganization of the ANSI/TIA/EIA-568-A standard to address cabling system requirements only and to have separate standards address component specifications. Incorporation of the above mentioned TSBs, Addenda, and Interim Standard. Definitions have been harmonized across all of TIA’s telecommunications infrastructure standards. Performance specifications are provided for category 5e balanced 100-ohm cabling. Performance specifications are provided for 50/125 µm optical fiber and cables. Small form factor optical fiber connector designs are allowed in addition to the 568SC. The term telecommunications closet has been replaced with telecommunications room. The permanent link has replaced the basic link as a test configuration.

Relationship to other TIA standards and documents This Standard is one of three technical standards that address commercial building cabling for telecommunications products and services. By referencing the two standards listed below, this Standard not only provides recommendations and specifications for the cabling system, but also its components. Each of the three standards may be reviewed and updated independently. The latest revision of each respective standard takes precedence over its previous edition. • • Commercial Building Telecommunications Cabling Standard; Part 2: Balanced Twisted-Pair Cabling Components (ANSI/TIA/EIA-568-B.2) Optical Fiber Cabling Components Standard (ANSI/TIA/EIA-568-B.3)

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This Standard is one of a series of technical standards that address building cabling for telecommunications products and services. These series of standards include: • • • • • Commercial Building (ANSI/TIA/EIA-569-A) Standard for Telecommunications Pathways and Spaces

Residential Telecommunications Cabling Standard (ANSI/TIA/EIA-570-A) Administration Standard for the Telecommunications Infrastructure of Commercial Buildings (ANSI/TIA/EIA-606) Commercial Building (ANSI/TIA/EIA-607) Grounding and Bonding Requirements for Telecommunications

Customer-Owned Outside Plant Telecommunications Cabling Standard (ANSI/TIA/EIA-758) Where appropriate,

This Standard contains references to national and international standards. 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 Consulting 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 implemented. 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.

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1

1.1

INTRODUCTION

Purpose

This Standard specifies a generic telecommunications cabling system for commercial buildings that will support a multi-product, multi-vendor environment. It also provides information 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 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 a connecting their respective elements. In order to determine the requirements of a nd generic 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 applications 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 requirements are designated by the word “shall”; advisory requirements are designated by the words “should”, “may” or “desirable” which are used interchangeably in this Standard. Mandatory criteria generally apply to protection, performance, administration and compatibility; they specify the absolute minimum acceptable requirements. Advisory or desirable criteria are presented when their attainment will enhance the general performance of the cabling system in all its contemplated applications. A note in the text, table, or figure is used for emphasis or for offering informative suggestions.

1.3

Metric equivalents of US customary units

The majority of the metric dimensions in this Standard are soft conversions of US customary units; e.g., 100 millimeters is the soft conversion of 4 inches.

1.4

Life of this Standard

This Standard is a living document. The criteria contained in this Standard are subject to revisions and updating as warranted by advances in building construction techniques and telecommunications technology.

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1.5

Telecommunications cabling system structure

Figure 1-1 illustrates a representative model for the various functional elements that comprise a commercial building telecommunications cabling system. It depicts the relationship between the elements and how they are configured to create a total system. The elements of the telecommunications cabling system structure are: a) Horizontal cabling (clause 4); b) Backbone cabling (clause 5); c) Work area (clause 6); d) Telecommunications rooms (clause 7); e) Equipment rooms (clause 8); f) Entrance facilities (clause 9); and,

g) Administration. NOTE – Basic administration information is covered in various locations throughout this Standard. Refer to ANSI/TIA/EIA-606 for more information regarding administration.

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Legend

Access provider Entrance facility Equipment room Intermediate cross-connect TR Horizontal Cabling TR EF AP EF ER IC Main cross-connect Telecommunications room Work area Telecommunications outlet/connector Cross-connect Splice AP EF ER IC MC TR WA

WA

Intrabuilding Backbone Cabling MC

Building 1

IC EF & ER TR Building 2 TR WA Interbuilding Backbone Cabling

IC EF & ER TR Building 3 TR WA

IC EF & ER TR Building 4 NOTES 1 – This figure is not meant to be an all-inclusive representation of the telecommunications cabling system and is provided only as a typical example. 2 – All cross-connects located in the telecommunications rooms (TRs) in this figure are horizontal cross-connects (HCs). Figure 1-1 Typical telecommunications cabling system TR WA

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2

SCOPE

This Standard specifies minimum requirements for telecommunications cabling within a commercial building and between buildings in a campus environment. It specifies cabling requirements, cabling distances, telecommunications outlet/connector configurations, and a recommended topology. Building telecommunications cabling specified by this Standard is intended to support a wide range of different commercial building sites and applications (e.g., voice, data, text, video, and image). Typically, this range includes sites with a geographical extent from 3000 m (approximately 10 000 ft), up to 1 000 000 m2 (approximately 10 000 000 ft2) of office space, and with a population of up to 50 000 individual users. Telecommunications cabling systems specified by this Standard are intended to have a useful life in excess of ten years. This Standard applies to the telecommunications cabling systems of buildings for commercial enterprises that are office oriented.

2.1

Normative references

The following standards contain provisions that, through reference in this text, constitute provisions of this Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision; parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated. ANSI and TIA maintain registers of currently valid national standards published by them. a) ANSI/TIA/EIA-526-7, Optical Power Loss Measurements of Installed Singlemode Fiber Cable Plant b) ANSI/TIA/EIA-526-14-A, Optical Power Loss Measurements of Installed Multimode Fiber Cable Plant c) ANSI/TIA/EIA-568-B.2, Commercial Building Telecommunications Cabling Standard; Part 2: Balanced Twisted-Pair Cabling Components d) ANSI/TIA/EIA-568-B.3, Optical Fiber Cabling Components Standard e) ANSI/TIA/EIA-569-A, Commercial Building Standard for Telecommunications Pathways and Spaces f) ANSI/TIA/EIA-570-A, Residential Telecommunications Cabling Standard

g) ANSI/TIA/EIA-606, Administration Standard for the Telecommunications Infrastructure of Commercial Buildings h) ANSI/TIA/EIA-607, Commercial Building Grounding/Bounding Requirements i) j) ANSI/TIA/EIA-758, Customer-Owned Outside Plant Telecommunications Cabling Standard ASTM D 4566, Standard Test Methods For Electrical Performance Properties Of Insulations And Jackets For Telecommunications Wire And Cable

k) IEC 60603-7, Connectors for Frequencies below 3 MHz for use with Printed Circuit Boards, Part 7: Detailed Specifications for Connectors, 8-way Including Fixed and Free Connectors with Common Mating Features NOTE - Although the title of IEC 60603-7 appears to limit the bandwidth of the 8-way modular connectors to 3 MHz or less, these types of connectors may be qualified for use at higher frequencies when tested and proven to be compliant with the performance

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requirements specified in ANSI/TIA/EIA-568-B.2.

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3

DEFINITION OF TERMS, ACRONYMS AND ABBREVIATIONS, AND UNITS OF MEASURE

General

3.1

This clause contains the definitions of terms, acronyms, and abbreviations that have special technical meaning or that are unique to the technical content of this Standard. Special definitions that are appropriate to individual technical clauses are also included.

3.2

Definition of terms

The generic definitions in this clause have been formulated for use by the entire family of telecommunications infrastructure standards. Specific requirements are found in the normative clauses of this Standard. For the purposes of this Standard, the following definitions apply. access provider: The operator of any facility that is used to convey telecommunications signals to and from a customer premises. adapter: A device that enables any or all of the following: (1) different sizes or types of plugs to mate with one another or to fit into a telecommunications outlet, (2) the rearrangement of leads, (3) large cables with numerous wires to fan out into smaller groups of wires, and (4) interconnection between cables. adapter; optical fiber duplex: A mechanical device designed to align and join two duplex optical fiber connectors (plugs) to form an optical duplex connection. administration: The method for labeling, identification, documentation and usage needed to implement moves, additions and changes of the telecommunications infrastructure. attenuation: The decrease in magnitude of transmission signal strength between points, expressed in dB as the ratio of output to input signal level. backbone: A facility (e.g., pathway, cable or conductors) between telecommunications rooms, or floor distribution terminals, the entrance facilities, and the equipment rooms within or between buildings. backbone cable: See backbone. bonding: The permanent joining of metallic parts to form an electrically conductive path that will assure electrical continuity and the capacity to conduct safely any current likely to be imposed on it. bridged tap: A connection that enables multiple appearances of the same cable pair at several distribution points. bundled cable: An assembly of two or more cables continuously bound together to form a single unit. cable: An assembly of one or more insulated conductors or optical fibers, within an enveloping sheath. cable run: A length of installed media, which may include other components along its path. cable sheath: A covering over the optical fiber or conductor assembly that may include one or more metallic members, strength members, or jackets.

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cabling: A combination of all cables, jumpers, cords, and connecting hardware. campus: The buildings and grounds having legal contiguous interconnection. centralized cabling: A cabling configuration from the work area to a centralized cross-connect using pull through cables, an interconnect, or splice in the telecommunications room. channel: The end-to-end transmission path between two points at which application-specific equipment is connected. commercial building: A building or portion thereof that is intended for office use. connecting hardware: A device providing mechanical cable terminations. connector, small form factor: An optical fiber duplex connector with a size approximating that of an 8-position modular outlet/connector typically used for terminating 4-pair copper cable. consolidation point: A location for interconnection between horizontal cables extending from building pathways and horizontal cables extending into furniture pathways. cord (telecommunications): A cable using stranded conductors for flexibility, as in distribution cords or line cords. cross-connect: A facility enabling the termination of cable elements and their interconnection or cross-connection. cross-connection: A connection scheme between cabling runs, subsystems, and equipment using patch cords or jumpers that attach to connecting hardware on each end. customer premises: Building(s), grounds and appurtenances (belongings) under the control of the customer. data: Electronically encoded information. delay skew: The difference in propagation delay between any two pairs within the same cable sheath. demarcation point: A point where the operational control or ownership changes. drain wire: A non-insulated conductor placed in electrical contact with a shield. electromagnetic interference: Radiated or conducted electromagnetic energy that has an undesirable effect on electronic equipment or signal transmissions. end user: The owner or user of the premises cabling system. entrance facility (telecommunications): An entrance to a building for both public and private network service cables (including wireless) including the entrance point of the building and continuing to the entrance room or space. entrance point (telecommunications): The point of emergence for telecommunications cabling through an exterior wall, a floor, or from a conduit.

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entrance room or space (telecommunications): A space in which the joining of inter or intra building telecommunications backbone facilities takes place. equal level far-end crosstalk: A measure of the unwanted signal coupling from a transmitter at the near-end into another pair measured at the far-end, and relative to the received signal level. equipment cable, cord: A cable or cable assembly used to connect telecommunications equipment to horizontal or backbone cabling. equipment room (telecommunications): An environmentally controlled centralized space for telecommunications equipment that usually houses a main or intermediate cross-connect. far-end crosstalk loss: A measure of the unwanted signal coupling from a transmitter at the near end into another pair measured at the far end, and relative to the transmitted signal level. fiber optic: See optical fiber. furniture cluster: A contiguous group of work areas, typically including space divisions, work surfaces, storage, and seating. ground: A conducting connection, whether intentional or accidental, between an electrical circuit (e.g., telecommunications) or equipment and the earth, or to some conducting body that serves in place of earth. high-order mode transient losses: Losses in power caused by the attenuation in the cladding of multimode optical fiber. horizontal cabling: (1)The cabling between and including the telecommunications outlet/connector and the horizontal cross-connect. (2) The cabling between and including the building automation system outlet or the first mechanical termination of the h orizontal connection point and the horizontal crossconnect. horizontal cross-connect: A cross-connect of horizontal cabling to other cabling, e.g., horizontal, backbone, and equipment. hybrid cable: An assembly of two or more cables, of the same or different types or categories, covered by one overall sheath. hybrid optical fiber cable: An optical fiber cable containing two or more fiber types (e.g., multimode and singlemode). infrastructure (telecommunications): A collection of those telecommunications components, excluding equipment, that together provide the basic support for the distribution of all information within a building or campus. insertion loss: The signal loss resulting from the insertion of a component, or link, or channel, between a transmitter and receiver (often referred to as attenuation). interconnection: A connection scheme that employs connecting hardware for the direct connection of a cable to another cable without a patch cord or jumper. intermediate cross-connect: A cross-connect between first level and second level backbone cabling.

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intrabuilding telecommunications backbone: A pathway or cable facility for interconnecting telecommunications service entrance rooms, equipment rooms, or telecommunications rooms within a building. jumper: An assembly of twisted-pairs without connectors, used to join telecommunications circuits/links at the cross-connect. keying: The mechanical feature of a connector system that guarantees correct orientation of a connection, or prevents the connection to a jack, or to an optical fiber adapter of the same type intended for another purpose. link: A transmission path between two points, not including terminal equipment, work area cables, and equipment cables. local exchange carrier: The telecommunications company that provides public switched network access service. main cross-connect: A cross-connect for first level backbone cables, entrance cables, and equipment cables. main terminal space: The location of the cross-connect point of incoming cables from the telecommunications external network and the premises cable system. media (telecommunications): Wire, cable, or conductors used for telecommunications. mode: A path of light in an optical fiber. modular jack: A female telecommunications connector that may be keyed or unkeyed and may have 6 or 8 contact positions, but not all the positions need be equipped with jack contacts. multimode optical fiber: An optical fiber that carries many paths of light. multipair cable: A cable having more than four pairs. multi-user telecommunications outlet telecommunications outlet/connectors. assembly: A grouping in one location of several

open office: A floor space division provided by furniture, moveable partitions, or other means instead of by building walls. optical fiber: Any filament made of dielectric materials that guides light. optical fiber cable: An assembly consisting of one or more optical fibers. optical fiber duplex connection: A mated assembly of two duplex connectors and a duplex adapter. outlet/connector (telecommunications): A connecting device in the work area on which horizontal cable or outlet cable terminates. outside plant: Telecommunications infrastructure designed for installation exterior to buildings. patch cord: A length of cable with a plug on one or both ends.

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patch panel: A connecting hardware system that facilitates cable termination and cabling administration using patch cords. pathway: A facility for the placement of telecommunications cable. permanent link: A test configuration for a link excluding test cords and patch cords. plenum: A compartment or chamber to which one or more air ducts are connected and that forms part of the air distribution system. power sum equal level far-end crosstalk: A computation of the unwanted signal coupling from multiple transmitters at the near-end into a pair measured at the far-end, and normalized to the received signal level. power sum near-end crosstalk loss: A computation of the unwanted signal coupling from multiple transmitters at the near-end into a pair measured at the near-end. propagation delay: The time required for a signal to travel from one end of the transmission path to the other end. rearrangement: An action taken to replace, add, adapt or remove existing premises wiring system components. return loss: A ratio expressed in dB of the power of the outgoing signal to the power of the reflected signal. room, telecommunications: An enclosed space for housing telecommunications equipment, cable terminations, and cross-connect cabling, that is the recognized location of the horizontal cross-connect. screen: An element of a cable formed by a shield. screened twisted-pair (ScTP): A balanced cable with an overall screen. service entrance: See entrance facility (telecommunications). sheath: See cable sheath. shield: A metallic layer placed around a conductor or group of conductors. singlemode optical fiber: An optical fiber that carries only one path of light. space (telecommunications): An area used for housing the installation and termination of telecommunications equipment and cable, e.g., common equipment rooms, equipment rooms, common telecommunications rooms, telecommunications rooms, work areas, and maintenance holes/handholes. splice: A joining of conductors in a splice closure, meant to be permanent. splice closure: A device used to protect a splice. star topology: A topology in which telecommunications cables are distributed from a central point. telecommunications: Any transmission, emission, and reception of signs, signals, writings, images, and sounds, that is information of any nature by cable, radio, optical, or other electromagnetic systems.

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telecommunications entrance facility: See entrance facility (telecommunications). telecommunications entrance point: See entrance point (telecommunications). telecommunications entrance (telecommunications). room or space: See entrance room or space

telecommunications equipment room: See equipment room (telecommunications). telecommunications infrastructure: See infrastructure (telecommunications). telecommunications outlet: See outlet/connector (telecommunications). telecommunications service entrance: See entrance facility (telecommunications). telecommunications space: See space (telecommunications). telecommunications room: See room, telecommunications. terminal: (1) a point at which information may enter or leave a communications network. (2) The input-output associated equipment. (3) A device by means of which wires may be connected to each other. termination position: A discrete element of connecting hardware where telecommunications conductors are terminated. topology: The physical or logical arrangement of a telecommunications system. transfer impedance: A measure of shielding performance determined by the ratio of the voltage on the conductors enclosed by a shield to the surface currents on the outside of the shield. transition point: A location in the horizontal cabling where flat undercarpet cable connects to round cable. wire: An individually insulated solid or stranded metallic conductor. work area (work station): A building space where the occupants interact with telecommunications terminal equipment. work area cable (cord): A cable connecting the telecommunications outlet/connector to the terminal equipment.

3.3

ANSI AP ASTM ATM AWG BICSI CATV CCIA EF EIA

Acronyms and abbreviations

American National Standards Institute access provider American Society for Testing and Materials asynchronous transfer mode American Wire Gauge Building Industry Consulting Services International community antenna television Computer Communications Industry Association entrance facility Electronic Industries Alliance

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ELFEXT EMI EMS EP ER FCC FDDI FEXT FOCIS FTR HC HVAC IC IEC IEEE IS ISDN ISO LAN LED Mb/s MC MUTOA NCS NEC® NEMA NESC® NEXT NFPA NVP PSELFEXT PSFEXT PSNEXT ScTP STP TR TGB TIA TSB UL US UTP WA X

equal level far-end crosstalk electromagnetic interference energy management system entrance point equipment room Federal Communications Commission fiber distributed data interface far-end crosstalk Fiber Optic Connector Intermateability Standard Federal Telecommunications Recommendation horizontal cross-connect heating, ventilation, and air conditioning intermediate cross-connect International Electrotechnical Commission The Institute of Electrical and Electronics Engineers Interim Standard integrated services digital network International Organization for Standardization local area network light emitting diode megabits per second main cross-connect multi-user telecommunications outlet assembly National Communications System National Electrical Code® National Electrical Manufacturers Association National Electrical Safety Code® near-end crosstalk National Fire Protection Association nominal velocity of propagation power sum equal level far-end crosstalk power sum far-end crosstalk power sum near-end crosstalk screened twisted-pair shielded twisted-pair telecommunications room telecommunications grounding busbar Telecommunications Industry Association Telecommunications System Bulletin Underwriters Laboratories United States unshielded twisted-pair work area cross-connect

3.4

ºC °F dB ft GHz in km

Units of measure

degrees Celsius degrees Fahrenheit decibel foot gigahertz inch kilometer

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TIA/EIA-568-B.1

lbf m MHz mm N nm ns V rms µm

pound force meter megahertz millimeter newton nanometer nanosecond volts root mean square micron or micrometer

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TIA/EIA-568-B.1

4

4.1

HORIZONTAL CABLING

General

The horizontal cabling is the portion of the telecommunications cabling system that extends from the work area telecommunications outlet/connector to the horizontal cross-connect in the telecommunications room. The horizontal cabling includes horizontal cables, telecommunications outlet/connectors in the work area, mechanical terminations, and patch cords or jumpers located in the telecommunications room, and may include multi-user telecommunications outlet assemblies and consolidation points. NOTE - The term "horizontal" is used since typically the cable in this part of the cabling system runs horizontally along the floor(s) or ceiling(s) of a building. The following list of common services and systems should be considered when the horizontal cabling is designed. (The list is not intended to be complete.) a) Voice telecommunications service b) Premises switching equipment c) Data communications d) Local area networks (LAN) e) Video f) Other building signaling systems (building automation systems such as fire, security, HVAC, EMS, etc.)

In addition to satisfying today's telecommunications requirements, the horizontal cabling should be planned to reduce on-going maintenance and relocation. It should also accommodate future equipment and service changes. After construction of the building, the horizontal cabling is often much less accessible than the backbone cabling. The time, effort, and skills required for changes can be extremely high. In addition, access to the horizontal cabling frequently causes disruption to occupants and their work. These factors make the choice and layout of horizontal cable types very important to the design of the building cabling. Consideration should be given to accommodating a diversity of user applications in order to reduce or eliminate the probability of requiring changes to the horizontal cabling as user needs evolve. The pathways and spaces shall be designed and installed to support horizontal cabling in accordance with the requirements of ANSI/TIA/EIA-569-A.

4.2

Topology

The horizontal cabling shall be installed in a star topology as shown in figure 4 -1. Each work area telecommunications outlet/connector shall be connected to a horizontal cross-connect in a telecommunications room via the horizontal cable. A telecommunications room should be located on the same floor as the work areas served. Some networks or services require applications-specific electrical components (such as impedance matching devices). These application-specific electrical components shall not be installed as part of the horizontal cabling. When needed, such electrical components shall be placed external to the telecommunications outlet/connector. Keeping application-specific components external to the telecommunications outlet/connector will facilitate the use of the horizontal cabling for varying network and service requirements.

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Horizontal cabling shall contain no more than one transition point or consolidation point between the horizontal cross-connect and telecommunications outlet. Bridged taps and splices shall not be installed as part of the copper horizontal cabling. Splitters shall not be installed as part of the optical fiber horizontal cabling. WA

Horizontal Cabling 90 m (295 ft) Maximum WA

TR

X

HC

1

Legend

X HC Horizontal cross-connect Mechanical termination Telecommunications outlet/connector TR WA Telecommunications room Transition/consolidation point Work area 4-pair UTP/ScTP 4-pair UTP/ScTP -or2-fiber multimode fiber NOTES 1 – Cabling between telecommunications rooms for the purpose of creating "bus" and "ring" topologies is considered part o the backbone cabling. The direct connections f between nearby telecommunications rooms are covered in subclause 5.2.3. 2 – Centralized optical fiber cabling is designed as an alternative to the optical cross-connection located in the telecommunications room when deploying recognized optical fiber cable in the horizontal in support of centralized electronics. Specifications concerning centralized cabling are found in annex A. Figure 4-1 Typical horizontal and work area cabling using a star topology

4.3

Horizontal distances

The horizontal distance is the cable length from the mechanical termination of the media at the horizontal cross-connect in the telecommunications room to the telecommunications outlet/connector in

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TIA/EIA-568-B.1

the work area. The maximum horizontal distance shall be 90 m (295 ft), independent of media type (see figure 4-1). If a multi-user telecommunications outlet assembly (MUTOA) is used, the maximum horizontal distances of copper media shall be reduced in accordance with subclause 6.4.1.4. The length of the cross-connect jumpers and patch cords in the cross-connect facilities, including horizontal cross-connects, jumpers, and patch cords that connect horizontal cabling with equipment or backbone cabling, should not exceed 5 m (16 ft) in length. For each horizontal channel, the total length allowed for cords in the work area plus patch cords or jumpers plus equipment cables or cords in the telecommunications room shall not exceed 10 m (33 ft), unless a multi-user telecommunications assembly is used (see subclauses 6.4.1.4 and 6.4.1.5). NOTE – In establishing the maximum distance for each horizontal channel, an allowance was made for 5 m (16 ft) from the telecommunications outlet/connector to the work station.

4.4

Recognized cables

Two types of cables are recognized and recommended for use in the horizontal cabling system. These cables are: a) four-pair 100-ohm unshielded twisted-pair (UTP) or screened twisted-pair (ScTP) cables (ANSI/TIA/EIA-568-B.2) b) two or more optical (ANSI/TIA/EIA-568-B.3) fiber multimode cable, either 62.5/125 µm or 50/125 µm

At this time, 150-ohm shielded twisted-pair (STP-A) cable is a recognized media type (ANSI/TIA/EIA-568-B.2). It is not, however, recommended for new cabling installations and is expected to be removed from the next revision of this Standard. Recognized cables, associated connecting hardware, jumpers, patch cords, equipment cords, and work area cords shall meet all applicable requirements specified in ANSI/TIA/EIA-568-B.2 and ANSI/TIA/EIA568-B.3. When bundled and hybrid cables are used for horizontal cabling, each cable type shall be recognized and meet the transmission and color-code specifications for that cable type given in ANSI/TIA/EIA-568-B.2 and ANSI/TIA/EIA-568-B.3. Additionally, bundled or hybrid copper cables shall meet the bundled or hybrid cable requirements in ANSI/TIA-568-B.2. These requirements apply to hybrid cables and bundled cables assembled prior to installation, sometimes referred to as loomed, speed-wrap, or whip cable constructions. NOTES 1 – Annex C provides a brief description of a number of other horizontal cables that have been used in telecommunications. These cables, as well as others, may be effective for specific applications. Although