1、 T568.2-05(ANSI/TIA/EIA-568-B.2-2001)Commercial building telecommunications cabling standard Part 2: Balanced twisted-pair cabling components CSA Standard T568.2-05 (ANSI/TIA/EIA-568-B.2-2001) Commercial building telecommunications cabling standard Part 2: Balanced twisted-pair cabling components Pu
2、blished in May 2005 by Canadian Standards Association A not-for-profit private sector organization 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044 Visit our Online Store at www.ShopCSA.ca Commercial building telecommunications cabling standard T568.2-05
3、Part 2: Balanced twisted-pair cabling components CSA/2 Canadian Standards Association May 2005 T568.2-05 Commercial building telecommunications cabling standard Part 2: Balanced twisted-pair cabling components CSA Preface This is the first edition of CSA T568.2, Commercial building telecommunication
4、s cabling standard Part 2: Balanced twisted-pair cabling components. It replaces T529-95, Telecommunications Cabling Systems in Commercial Buildings. This Standard is an adoption of the identically titled ANSI/TIA/EIA (American National Standards Institute/Telecommunications Industry Association/Ele
5、ctronic Industries Alliance) Standard 568-B.2-2001 and is the product of the Telecommunications Industry Association TR-42 Technical Committee, which included a number of Canadian members in order to ensure that Canadian perspectives and requirements were addressed. It is written in SI (metric) unit
6、s with yard/pound (imperial) units in parentheses. This Standard has been adopted with no technical deviations. Where code requirements or regulations necessitate changes from US to Canadian references, they should be made by the user, as follows: (a) Throughout this Standard, replace the term “Amer
7、ican” with “Canadian”, as applicable. (b) Throughout this Standard, replace the term “state” with “provincial or territorial”, as applicable. (c) Throughout this Standard, replace “NEC” with “CE Code, Part I” (Canadian Electrical Code), as applicable. In addition, (i) where reference is made to “con
8、duit”, replace it with “conduit/EMT” (electrical metallic tubing) because, in accordance with the Canadian Electrical Code, Part I, EMT is not considered a type of conduit; and (ii) the definitions of the following terms are to be taken from the Canadian Electrical Code, Part I: “Bonding”, “Ground”,
9、 and “Raceway”. (d) Throughout this Standard, where reference is made to “FCC”, replace it with “CRTC” (Canadian Radio-television and Telecommunications Commission), or “Industry Canada”, as applicable. (e) The following Standards, published by the Canadian Standards Association, are adoptions of TI
10、A/EIA Standards. The requirements of these CSA Standards take precedence over the TIA/EIA Standards on which they are based; any reference in CSA T568.2 to the TIA/EIA Standard is to be replaced by a reference to the equivalent Canadian Standard: (i) T568.1-05, Commercial building telecommunications
11、 cabling standard Part 1: General requirements; and (ii) T568.3-05, Optical fiber cabling components standard. (f) Throughout this Standard, replace the term “Listed” with “Approved as applied to electrical equipment”. This Standard was reviewed for Canadian adoption by the CSA Technical Committee o
12、n Telecommunications Wiring Systems, under the jurisdiction of the Strategic Steering Committee on Information and Communications Technology, and has been formally approved by the Technical Committee. A list of the members of the Technical Committee is available upon request. May 2005 Commercial bui
13、lding telecommunications cabling standard T568.2-05 Part 2: Balanced twisted-pair cabling components May 2005 Canadian Standards Association CSA/3 Canadian Standards Association 2005 All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permissio
14、n of the publisher. TIA/EIA material is reprinted with permission. Inquiries regarding this CSA Standard should be addressed to Canadian Standards Association 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6 1-800-463-6727 416-747-4044 www.csa.ca TIA/EIA STANDARD Commercial Buildin
15、g 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 ANSI/TIA/EIA-568-B.2-2001 Approved:
16、April 23, 2001 TIA/EIA-568-B.2NOTICE 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 select
17、ing 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 e
18、xistence 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 (ANS
19、I) 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
20、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 Com
21、mittee on User Premises Telecommunications Infrastructure.) Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION 2001 Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 22201 All rights reserved PLEASE! DONT VIOLATE THE LAW! This document is copyrighted by the TIA and may not be
22、 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, Inter
23、national (303) 397-7956 TIA/EIA-568-B.2 i 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 Stand
24、ard 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 BALANCED TWISTED-PAIR CABLES 6 4.1 General . 6 4.2 Cable transmission performance. 6 4.2.1
25、 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 Br
26、eaking 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
27、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 horizonta
28、l cables13 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 TIA/EIA-568-B.2 ii 4.4.1 General .15 4.4.2 Applicability .15 4.4.3 Mechanical15 4.4.3.1 Insulated c
29、onductor .15 4.4.3.2 Pair assembly .15 4.4.3.3 Color code 16 4.4.3.4 Core assembly 16 4.4.3.5 Core wrap.16 4.4.3.6 Core shield16 4.4.3.7 Jacket .16 4.4.4 Transmission .16 4.4.4.1 DC resistance .16 4.4.4.2 DC resistance unbalance .16 4.4.4.3 Mutual capacitance16 4.4.4.4 Capacitance unbalance: pair-to
30、-ground.16 4.4.4.5 Characteristic impedance and structural return loss for category 3 cable .17 4.4.4.6 Return loss17 4.4.4.7 Insertion loss.17 4.4.4.8 NEXT loss.18 4.4.4.9 PSNEXT loss 19 4.4.4.10 ELFEXT 20 4.4.4.11 PSELFEXT21 4.4.4.12 Propagation delay of category 5e backbone cables 22 4.4.4.13 Pro
31、pagation delay skew for category 5e backbone cables 22 4.4.4.14 Dielectric strength22 4.4.5 Core shield resistance22 4.4.5.1 Measurement precautions 22 4.4.6 Performance marking.22 4.5 Stranded conductor cable . 23 4.5.1 Mechanical23 4.5.2 Transmission .23 4.5.3 Return loss23 4.5.4 Insertion loss .2
32、4 4.5.5 Performance marking.24 5 100 BALANCED TWISTED-PAIR CONNECTING HARDWARE .25 5.1 General . 25 5.2 Applicability . 25 5.3 Mechanical 25 5.3.1 Environmental compatibility 25 5.3.2 Mounting.26 5.3.3 Mechanical termination density.26 5.3.4 Design 26 5.3.5 Reliability 26 5.4 Transmission . 27 5.4.1
33、 Recognized categories .27 5.4.2 Insertion loss .27 5.4.3 Near-end crosstalk (NEXT) loss28 5.4.4 Return loss28 5.4.5 Far-end crosstalk (FEXT) loss 29 5.4.6 Propagation delay 29 5.4.7 Propagation delay skew .30 5.4.8 DC resistance30 5.5 Telecommunications outlet/connector 30 5.6 Performance marking.
34、31 TIA/EIA-568-B.2 iii 6 CORDS AND CROSS-CONNECT JUMPERS 32 6.1 General . 32 6.2 Applicability . 32 6.3 Mechanical 32 6.3.1 Insulated conductor32 6.3.2 Color codes .32 6.3.3 Transmission requirements 33 6.3.3.1 Near-end crosstalk (NEXT) loss .33 6.3.3.2 Return loss35 Annex A Reliability testing of c
35、onnecting hardware for 100 balanced twisted-pair cabling (normative) 36 A.1 General . 36 A.2 Contact resistance measurement 37 A.3 Insulation resistance 37 A.4 Durability . 37 A.5 Vibration 37 A.6 Stress relaxation 37 A.7 Thermal shock . 38 A.8 Humidity/temperature cycle 38 A.9 Other testing 38 Anne
36、x B Test equipment overview (normative) 39 B.1 General test configuration. 39 B.2 Balun requirements 39 B.3 Ground plane requirements 40 B.4 Network analyzer requirements. 40 B.5 Impedance matching terminations . 40 B.5.1 Balun terminations .40 B.5.2 Resistor terminations .40 B.5.3 Termination perfo
37、rmance at test interface41 B.6 General calibration and reference plane of measurements 41 B.6.1 Calibration references 42 B.6.1.1 100 reference load measurement procedure42 B.6.1.2 100 reference load return loss requirement 42 Annex C Testing of cable (normative)43 C.1 Insertion loss of cable. 43 C.
38、1.1 Test configuration for cable insertion loss 43 C.1.2 Calibration for cable.44 C.1.2.1 Two-port calibration of the test system44 C.1.3 Measurement of cable insertion loss .44 C.2 NEXT loss of cable. 45 C.2.1 Test configuration of cable NEXT loss.45 C.2.2 Calibration of cable NEXT loss .45 C.2.3 M
39、easurement of cable NEXT loss .45 C.3 ELFEXT of cable 45 C.3.1 Test configuration of cable ELFEXT 45 C.3.2 Calibration of cable FEXT loss46 C.3.3 Measurement of cable FEXT loss .46 C.4 Return loss of cable . 46 C.4.1 Test configuration of cable return loss .46 TIA/EIA-568-B.2 iv C.4.2 Calibration of
40、 cable return loss46 C.4.2.1 One-port calibration of the test system46 C.4.3 Measurement of cable return loss .46 Annex D Testing of connecting Hardware (normative) 47 D.1 Insertion loss of connecting hardware 47 D.1.1 Test configuration for connecting hardware insertion loss .47 D.1.2 Calibration.4
41、7 D.1.3 Measurement of connecting hardware insertion loss 47 D.2 NEXT loss of connecting hardware 47 D.2.1 Test configuration for connecting hardware NEXT loss.47 D.2.2 Calibration of connecting hardware NEXT loss 49 D.2.3 Measurement of connecting hardware NEXT loss 50 D.3 FEXT loss of connecting h
42、ardware 50 D.3.1 Test configuration of connecting hardware FEXT loss 50 D.3.2 Calibration of connecting hardware FEXT loss.50 D.3.3 Measurement of connecting hardware FEXT loss 50 D.4 Return loss of connecting hardware 51 D.4.1 Test configuration of connecting hardware return loss 51 D.4.1.1 Return
43、loss reference plug .51 D.4.2 Calibration of connecting hardware return loss.51 D.4.3 Measurement of connecting hardware return loss 51 D.5 Test plugs for connecting hardware . 51 D.5.1 Scope .51 D.5.2 Applicability .51 D.5.3 General test plug requirements.52 D.5.4 De-embedding reference NEXT plug c
44、onstruction 52 D.5.5 Set up and calibration 53 D.5.6 De-embedding reference plug NEXT loss measurement.54 D.5.7 De-embedding reference NEXT jack construction 54 D.5.8 De-embedding reference jack NEXT loss measurement .55 D.5.9 Test plug NEXT measurement 56 D.5.10 Modular test plug qualification.58 D
45、.6 Modular test plug construction 58 D.6.1 Test plug termination .58 D.6.1.1 Test plug construction .59 D.7.1 Test plug lead length62 Annex E Testing of cabling (normative) .63 E.1 Insertion loss of cabling 63 E.1.1 Test configuration of cabling insertion loss.63 E.1.2 Calibration of cabling inserti
46、on loss .63 E.1.3 Measurement of cabling insertion loss.63 E.2 NEXT loss of cabling 63 E.2.1 Test configuration of cabling NEXT loss 63 E.2.2 Calibration of cabling NEXT loss.63 E.2.3 Measurement of cabling NEXT loss 63 E.3 ELFEXT of cabling . 63 E.3.1 Test configuration of cabling ELFEXT .63 E.3.2
47、Calibration of cabling FEXT loss .63 E.3.3 Measurement of cabling FEXT loss.63 E.4 Return loss of cabling . 63 E.4.1 Test configuration of cabling return loss 63 E.4.2 Calibration of cabling return loss .63 E.4.3 Measurement of cabling return loss.63 TIA/EIA-568-B.2 v Annex F Testing of patch cords
48、(normative).64 F.1 Insertion loss of patch cords . 64 F.2 NEXT loss of patch cords . 64 F.2.1 Test configuration for patch cord NEXT loss 64 F.2.2 Calibration for patch cord NEXT loss.64 F.2.3 Measurement for patch cord NEXT loss 65 F.3 ELFEXT of patch cords 65 F.4 Return loss of patch cords 65 F.4.
49、1 Test configuration for patch cord return loss 65 F.4.2 Calibration for patch cord return loss.65 F.4.3 Measurement for patch cord return loss 65 F.4.3.1 Mechanical stress test.65 F.5 Test heads for patch cords . 65 F.5.1 Test head NEXT qualification .66 F.5.1.1 Test plugs for test head NEXT qualification.66 F.5.1.2 Test head setup 66 F.5.1.3 NEXT loss differential termination 66 F.5.1.4 NEXT loss differential and common mode termination 68 F.5.1.5 NEXT loss difference.68 F.5.2 Test head FEXT loss .68 F.5.3 Test head return loss .68 F.6 Test head des
