1、 T568.2-2-05(ANSI/TIA/EIA-568-B.2-2-2001)Commercial building telecommunications cabling standard Part 2: Balanced twisted pair cabling components Addendum 2 CSA StandardT568.2-2-05 (ANSI/TIA/EIA-568-B.2-2-2001) Commercial building telecommunications cabling standard Part 2: Balanced twisted pair cab
2、ling components Addendum 2 Published 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 telecommunication
3、s cabling standard T568.2-2-05 Part 2: Balanced twisted pair cabling components Addendum 2 CSA/2 Canadian Standards Association May 2005 T568.2-2-05 Commercial building telecommunications cabling standard Part 2: Balanced twisted pair cabling components Addendum 2 CSA Preface This is the first editi
4、on of CSA T568.2-2, Commercial building telecommunications cabling standard Part 2: Balanced twisted pair cabling components Addendum 2. This Standard is an adoption of the identically titled ANSI/TIA/EIA (American National Standards Institute/Telecommunications Industry Association/Electronic Indus
5、tries Alliance) Standard 568-B.2-2-2001 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) units with yard
6、/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 “American” with
7、“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 “conduit”, repl
8、ace 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”, and “Racew
9、ay”. (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 Standard, published by the Canadian Standards Association, is an adoption of a TIA/EIA Sta
10、ndard. The requirements of this CSA Standard take precedence over the TIA/EIA Standard on which it is based; any reference in CSA T568.2-2 to the TIA/EIA Standard is to be replaced by a reference to the equivalent Canadian Standard: T568.2-05, Commercial building telecommunications cabling standard
11、Part 2: Balanced twisted-pair cabling components. (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 on Telecommunications Wiring Systems, under the jurisdiction o
12、f 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 building telecommunications cabling standard T568.2-2-05 Part 2:
13、 Balanced twisted pair cabling components Addendum 2 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 permission of the publisher. TIA/EIA material is reprinte
14、d 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 ANSI/TIA/EIA-568-B.2-2-2001 Approved: December 26, 2001 TIA/EIA STANDARD Cm TIA/EIA
15、-568-B.2-2 Commercial Building Telecommunications Cabling Standard Part 2: Balanced Twisted Pair Cabling Components Addendum 2 TIA/EIA-568-B.2-2 (Addendum No. 2 to TIA/EIA-568-B.2) DECEMBER 2001 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Telecommunications Industry Association represents the commun
16、ications 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 obt
17、aining 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
18、 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 p
19、olicy. 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 requirement
20、s. 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.3-4426-AD2, formulated under the cognizance of the TIA TR-42 Committee on User Premi
21、ses Telecommunications Infrastructure.) Published by g211TELECOMMUNICATIONS 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 reproduced with
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30、ING WITHOUT LIMITATION ANY AND ALL INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINESS, LOSS OF PROFITS, LITIGATION, OR THE LIKE), WHETHER BASED UPON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE), PRODUCT LIABILITY OR OTHERWISE, EVEN I
31、F ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA/EIA-568-B.2-2 1 Addendum No. 2 to TIA/EIA-568-B.2 1 Purpose: 2 3 The purpose of t
32、his addendum is to revise sub-clauses 4.3.4.8, 4.4, 4.4.1, 4.4.4.9, and 5.4.3 of 4 TIA/EIA-568-B.2. These revisions are identified in the following text with additions shown in bold italics 5 and deletions shown as strikeout. 6 7 Revisions: 8 9 4.3.4.8 10 11 Replace equation (5) with: 12 13 )16/log(
33、15)16(_3 fNEXTNEXT cablecat dB 14 15 4.4 16 17 Add introductory text as follows: 18 19 Four-pair 100-ohm twisted-pair cables that comply with the requirements of clause 4.3 and 20 multipair backbone cables that comply with the requirements of clauses 4.4.1 through 4.4.6 are 21 recognized for use in
34、backbone cabling system. 22 23 4.4.1 Multipair backbone cable General 24 25 Covered herein are the r Requirements for multipair backbone cables in pair sizes greater than 4 pairs 26 are specified in clause 4.4.1 through 4.4.6 for use in the backbone cabling system. 27 28 4.4.4.9 29 30 Revise categor
35、y 3 values in table 13 as follows: 31 32 Table 1 - Backbone cable PSNEXT loss 20 C 3 C (68 F 5.5F) 33 For a length of 100 m (328 ft) 34 Frequency (MHz) Category 3 (dB) Category 5e (dB) 0.772 43.0 64.0 1.0 41.3 62.3 4.0 32.3 53.3 8.0 27.8 48.8 10.0 26.3 47.3 16.0 23.2 44.2 20.0 - 42.8 25.0 - 41.3 31.
36、25 - 39.9 62.5 - 35.4 100.0 - 32.3 35 TIA/EIA-568-B.2-2 2 5.4.3 1 2 NEXT(16) shall be 1834 dB for category 3 connecting hardware. 3 4 Revise category 3 values in table 20 as follows: 5 6 Table 2 - Connecting hardware NEXT loss, worst pair-to-pair 7 Frequency (MHz) Category 3 (dB) Category 5e (dB) 1.
37、0 58.10 65.0 4.0 46.0 65.0 8.0 40.0 39.9 64.9 10.0 38.10 63.0 16.0 34.0 33.9 58.9 20.0 - 57.0 25.0 - 55.0 31.25 - 53.1 62.5 - 47.1 100.0 - 43.0 8 I consent to CSA collecting and using the above information to facilitate the collection of my suggestions and comments. Visit CSAs policy on privacy at w
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