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ANSI/TIA/EIA-568-B.2-2001 Approved: April 23, 2001 TIA/EIA STANDARD B.2 - 568 - Commercial Building TIA/EIA Telecommunications Cabling Standard Part 2: Balanced Twisted-Pair Cabling Components TIA/EIA-568-B.2 (Revision of TIA/EIA-568-A) MAY 2001 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Telecommunications Industry Association represents the communications sector of NOTICE TIA/EIA Engineering Standards and Publications are designed to serve the public interest 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 Publications 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 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 obligation 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 and to determine the applicability of regulatory limitations before its use. (From Standards Proposal Nos.4426-B and 4426-B.1, formulated under the cognizance of the TIA TR- 42 Committee on User Premises Telecommunications Infrastructure.) Published by ÓTELECOMMUNICATIONS INDUSTRY ASSOCIATION 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) All rights reserved Printed in U.S.A. PLEASE! DON'T VIOLATE THE LAW! This document is copyrighted by the TIA and may not be reproduced without permission. Organizations may obtain permission to reproduce a limited number of copies through entering into a license agreement. For information, contact: Global Engineering Documents 15 Inverness Way East Englewood, CO 80112-5704 or call U.S.A. and Canada 1-800-854-7179, International (303) 397-7956 TIA/EIA-568-B.2 COMMERCIAL BUILDING TELECOMMUNICATIONS CABLING STANDARD PART 2: BALANCED TWISTED-PAIR CABLING COMPONENTS TABLE OF CONTENTS 1 INTRODUCTION ......................................................................................................................... 1 1.1 Purpose ................................................................................................................................ 1 1.2 Specification of criteria ........................................................................................................... 1 1.3 Metric equivalents of US customary units ................................................................................ 1 1.4 Life of the Standard ................................................................................................................ 1 2 SCOPE ....................................................................................................................................... 1 2.1 Applicability ........................................................................................................................... 1 2.2 Normative references ............................................................................................................. 2 3 DEFINITIONS, ABBREVIATIONS AND ACRONYMS, UNITS OF MEASURE .................................. 3 3.1 General ................................................................................................................................. 3 3.2 Abbreviations and acronyms................................................................................................... 5 3.3 Units of measure.................................................................................................................... 5 4 100 W BALANCED TWISTED-PAIR CABLES................................................................................ 6 4.1 General ................................................................................................................................. 6 4.2 Cable transmission performance............................................................................................. 6 4.2.1 Recognized categories .......................................................................................................... 6 4.2.2 Multi-disturber environment ................................................................................................... 6 4.2.3 Measurements points and spacing ......................................................................................... 6 4.3 Horizontal cable..................................................................................................................... 6 4.3.1 General ................................................................................................................................ 6 4.3.2 Applicability .......................................................................................................................... 6 4.3.3 Mechanical........................................................................................................................... 7 4.3.3.1 Insulated conductor ............................................................................................................ 7 4.3.3.2 Pair assembly .................................................................................................................... 7 4.3.3.3 Color codes........................................................................................................................ 7 4.3.3.4 Cable diameter ................................................................................................................... 7 4.3.3.5 Breaking strength............................................................................................................... 7 4.3.3.6 Bending radius ................................................................................................................... 7 4.3.4 Transmission ........................................................................................................................ 7 4.3.4.1 DC resistance .................................................................................................................... 7 4.3.4.2 DC resistance unbalance .................................................................................................... 8 4.3.4.3 Mutual capacitance............................................................................................................. 8 4.3.4.4 Capacitance unbalance: pair-to-ground................................................................................ 8 4.3.4.5 Characteristic impedance and structural return loss (SRL) for category 3 cable ...................... 8 4.3.4.6 Return loss......................................................................................................................... 9 4.3.4.7 Insertion loss...................................................................................................................... 9 4.3.4.8 Near-end crosstalk (NEXT) loss .........................................................................................10 4.3.4.9 Power sum near-end crosstalk (PSNEXT) loss ....................................................................11 4.3.4.10 Equal level far-end crosstalk (ELFEXT) .............................................................................12 4.3.4.11 Power sum equal level far-end crosstalk (PSELFEXT) .......................................................13 4.3.4.12 Propagation delay for 4-pair horizontal cables....................................................................13 4.3.4.13 Propagation delay skew for 4-pair horizontal cables ...........................................................14 4.3.4.14 Measurement precautions ................................................................................................14 4.3.5 Performance marking...........................................................................................................14 4.3.6 Bundled and hybrid cables ...................................................................................................15 4.4 Backbone cable ................................................................................................................... 15 i TIA/EIA-568-B.2 4.4.1 General ...............................................................................................................................15 4.4.2 Applicability .........................................................................................................................15 4.4.3 Mechanical..........................................................................................................................15 4.4.3.1 Insulated conductor ...........................................................................................................15
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