TIA-568-B 2-5-2003 Commercial Building Telecommunications Cabling Standard Part 2 Balanced Twisted Pair Cabling Components Addendum 5 - Corrections to TIA EIA-568-B 2 Addendum 5 to.pdf

1、 TIA STANDARD ANSI/TIA-568-B.2-5-2003 Approved: January 16, 2003 Commercial Building Telecommunications Cabling Standard Part 2: Balanced Twisted-Pair Cabling Components Addendum 5 Corrections to TIA/EIA-568-B.2 TIA-568-B.2-5 (Addendum No. 5 to TIA/EIA-568-B.2) January 2003 TELECOMMUNICATIONS INDUST

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24、lecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-568-B.2-5 Corrections to TIA/EIA-568-B.2 TABLE OF CONTENTS 1 INTRODUCTION .2 2 CLAUSE REVISIONS2 D.5.2 Applicability .2 D.5.8 De-embe

25、dding reference jack NEXT loss measurement 2 D.6 Modular test plug construction2 1 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-568-B.2-5 2 1 INTRODUCTION The purpose

26、 of this addendum is to correct certain references in TIA/EIA-568-B.2. These revisions are identified in the following text with additions shown in bold italics and deletions shown as strikeout. Other paragraphs in the clause, or in TIA/EIA-568-B.2 that are not shown remain the same. 2 CLAUSE REVISI

27、ONS D.5.2 Applicability For the purposes of this Standard, a modular test plug consists of short lengths of solid or stranded UTP twisted-pair conductors with a modular plug terminated on one end. Modular test plugs may be constructed from cross-connect (patch) and equipment cords. Clause D.7 specif

28、ies a systematic termination procedure that may be used to manufacture a set of plugs likely to satisfy the modular test plug requirements of clause D.6.10 D.5.10. D.5.8 De-embedding reference jack NEXT loss measurement Measure the NEXT loss of the de-embedding reference plug mated to the de-embeddi

29、ng reference jack for all 6 pair combinations as shown in figure D.8. Maintain correct wire pair polarity as specified in clause D.6.5 D.5.6. D.6 Modular test plug construction It is necessary to obtain a set of test plugs that complies with clause D.6.10 D.5.10, to perform connecting hardware testi

30、ng. It is acceptable to obtain these test plugs by cutting them from the ends of production patch cords. Because of the variation in production cords, and the large number of plugs that might be required to obtain test plugs, the following alternate procedure is suggested. Copyright Telecommunicatio

31、ns Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-