1、 T568.2-3-05(ANSI/TIA/EIA-568-B.2-3-2002)Commercial building telecommunications cabling standard Part 2: Balanced twisted pair cabling components Addendum 3 Additional considerations for insertion loss and return loss pass/fail determination CSA Standard T568.2-3-05 (ANSI/TIA/EIA-568-B.2-3-2002) Com
2、mercial building telecommunications cabling standard Part 2: Balanced twisted pair cabling components Addendum 3 Additional considerations for insertion loss and return loss pass/fail determination Published in May 2005 by Canadian Standards Association A not-for-profit private sector organization 5
3、060 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 Part 2: Balanced twisted pair cabling components Addendum 3 T568.2-3-05 Additional considerations for insertio
4、n loss and return loss pass/fail determination CSA/2 Canadian Standards Association May 2005 T568.2-3-05 Commercial building telecommunications cabling standard Part 2: Balanced twisted pair cabling components Addendum 3 Additional considerations for insertion loss and return loss pass/fail determin
5、ation CSA Preface This is the first edition of CSA T568.2-3, Commercial building telecommunications cabling standard Part 2: Balanced twisted pair cabling components Addendum 3 Additional considerations for insertion loss and return loss pass/fail determination. This Standard is an adoption of the i
6、dentically titled ANSI/TIA/EIA (American National Standards Institute/Telecommunications Industry Association/Electronic Industries Alliance) Standard 568-B.2-3-2002 and is the product of the Telecommunications Industry Association TR-42 Technical Committee, which included a number of Canadian membe
7、rs in order to ensure that Canadian perspectives and requirements were addressed. It is written in SI (metric) units 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 Can
8、adian references, they should be made by the user, as follows: (a) Throughout this Standard, replace the term “American” with “Canadian”, as applicable. (b) Throughout this Standard, replace the term “state” with “provincial or territorial”, as applicable. (c) Throughout this Standard, replace “NEC”
9、 with “CE Code, Part I” (Canadian Electrical Code), as applicable. In addition, (i) where reference is made to “conduit”, 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
10、 definitions of the following terms are to be taken from the Canadian Electrical Code, Part I: “Bonding”, “Ground”, 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
11、”, as applicable. (e) The following Standard, published by the Canadian Standards Association, is an adoption of a TIA/EIA Standard. The requirements of this CSA Standard take precedence over the TIA/EIA Standard on which it is based; any reference in CSA T568.2-3 to the TIA/EIA Standard is to be re
12、placed by a reference to the equivalent Canadian Standard: T568.2-05, Commercial building telecommunications cabling standard Part 2: Balanced twisted-pair cabling components. Commercial building telecommunications cabling standard Part 2: Balanced twisted pair cabling components Addendum 3 T568.2-3
13、-05 Additional considerations for insertion loss and return loss pass/fail determination May 2005 Canadian Standards Association CSA/3 (f) Throughout this Standard, replace the term “Listed” with “Approved as applied to electrical equipment”. This Standard was reviewed for Canadian adoption by the C
14、SA Technical Committee on 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.
15、 May 2005 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 reprinted with permission. Inquiries regarding this CSA Standard should be addressed to Canadian
16、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.2-3-2002 Approved: February 27, 2002 TIA/EIA STANDARD Cm TIA/EIA-568-B.2-3 Commercial Building Telecommunications Cabling Standard Part 2: Balanced Twist
17、ed Pair Cabling Components Addendum 3 Additional Considerations for Insertion Loss and Return Loss Pass/Fail Determination TIA/EIA-568-B.2-3 (Addendum No. 3 to TIA/EIA-568-B.2) MARCH 2002 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Telecommunications Industry Association represents the communication
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22、s 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-AD3, formulated under the cognizance of the TIA TR-42.7 Subcommittee on Telecommunic
23、ations Copper Cabling Systems.) Published by g211TELECOMMUNICATIONS INDUSTRY ASSOCIATION 2002 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 without perm
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32、OUT 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 IF ADVISE
33、D 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.2-3 ADDITIONAL CONSIDERATIONS FOR INSERTION LOSS AND RETURN LOSS PASS/FAIL DETE
34、RMINATION TABLE OF CONTENTS 1 INTRODUCTION.1 2 CLAUSE REVISIONS .1 i TIA/EIA-568-B.2-3 1 INTRODUCTION The purpose of this addendum is to add clause I.2.5 to TIA/EIA-568-B.2. These revisions are identified in the following text with additions shown in bold italics and deletions shown as strikeout. 2
35、CLAUSE REVISIONS I.2.5 Additional considerations for insertion loss and return loss pass/fail determination Due to accuracy considerations, measured insertion loss values less than 3 dB shall not be marked with an asterisk and shall not be used for pass/fail determination. wWhen the measured inserti
36、on loss is less than 3 dB, the measured return loss shall not be used in determining a fail. Return loss values greater than 25 dB may be reported as “25 dB”. 1 I consent to CSA collecting and using the above information to facilitate the collection of my suggestions and comments. Visit CSAs policy
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