1、 TIA STANDARD ANSI/TIA-568-B.1-4-2003 Approved: February 26, 2003 Commercial Building Telecommunications Cabling Standard Part 1: General Requirements Addendum 4 Recognition of Category 6 and 850 nm Laser-Optimized 50/125 m Multimode Optical Fiber Cabling TIA-568-B.1-4 (Addendum No. 4 to TIA/EIA-568
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8、. (From Standards Proposal No. 3-4425-AD4, formulated under the cognizance of the TIA TR-42.1 Subcommittee on Commercial Building Telecommunications Cabling.) Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION 2003 Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 22201 U.S.A
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24、54-7179, International (303) 397-7956 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-4 Recognition of Category 6 and 850 nm Laser-Optimized 50/125 m Multimode Optic
25、al Fiber Cabling TABLE OF CONTENTS 1 INTRODUCTION 1 2 CLAUSE REVISIONS.1 iCopyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-4 iiCopyright Telecommunications Industry A
26、ssociation Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.1-4 1 INTRODUCTION The purpose of this addendum is to recognize balanced twisted pair category 6 cabling and 850 nm laser-optimized 50/125 m multimode optical
27、 fiber cable by revising sub-clauses 4.4, 4.5, 5.3 and 11.2.2 of TIA/EIA-568-B.1. These revisions are identified in the following text with additions shown in bold italics and deletions shown as strikeout. 2 CLAUSE REVISIONS 4.4 Recognized cables Two types of cables are recognized and recommended fo
28、r use in the horizontal cabling system. These cables are: a) four-pair 100-ohm category 3 (ANSI/TIA/EIA-568-B.2), category 5e (ANSI/TIA/EIA-568-B.2) or category 6 (ANSI/TIA/EIA-568-B.2-1) unshielded twisted-pair (UTP) or screened twisted-pair (ScTP) cables (ANSI/TIA/EIA-568-B.2) b) two or more optic
29、al fiber multimode cable, either 62.5/125 m or 50/125 m (ANSI/TIA/EIA-568-B.3 or ANSI/TIA/EIA-568-B.3-1) At this time, 150-ohm shielded twisted-pair (STP-A) cable is a recognized media type (ANSI/TIA/EIA-568-B.2). It is not, however, recommended for new cabling installations and is expected to be re
30、moved from the next revision of this Standard. Recognized cables, associated connecting hardware, jumpers, patch cords, equipment cords, and work area cords shall meet all applicable requirements specified in ANSI/TIA/EIA-568-B.2, ANSI/TIA/EIA-568-B.2-1, and ANSI/TIA/EIA-568-B.3 and ANSI/TIA/EIA-568
31、-B.3-1. When bundled and hybrid cables are used for horizontal cabling, each cable type shall be recognized and meet the transmission and color-code specifications for that cable type given in ANSI/TIA/EIA-568-B.2, ANSI/TIA/EIA/-568-B.2-1, and ANSI/TIA/EIA-568-B.3 and ANSI/TIA/EIA-568-B.3-1. Additio
32、nally, bundled or hybrid copper cables shall meet the bundled or hybrid cable requirements in ANSI/TIA-568-B.2. These requirements apply to hybrid cables and bundled cables assembled prior to installation, sometimes referred to as loomed, speed-wrap, or whip cable constructions. NOTES 1 Annex C prov
33、ides a brief description of a number of other horizontal cables that have been used in telecommunications. These cables, as well as others, may be effective for specific applications. Although these cables are not part of the requirements of this Standard, they may be used in addition to the minimum
34、 requirements of this Standard. 2 Hybrid cables consisting of optical fiber and copper conductors are sometimes referred to as composite cables. 1Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without lice
35、nse from IHS-,-,-TIA-568-B.1-4 4.5 Choosing types of cabling This Standard recognizes the importance of both voice and data telecommunications in a commercial building. A minimum of two telecommunications outlet/connectors shall be provided for each individual work area as shown in figure 4-1. One t
36、elecommunications outlet/connector may be associated with voice and the other with data. Consideration should be given to installing additional outlets/connectors based on present and projected needs. The two telecommunications outlet/connectors shall be configured as: a) One telecommunications outl
37、et/connector shall be supported by a four-pair 100-ohm cable, category 3 or higher (category 5e or category 6 recommended) as specified in ANSI/TIA/EIA-568-B.2 and ANSI/TIA/EIA-568-B.2-1. b) The other/second telecommunications outlet/connector(s) shall be supported by a minimum of one of the followi
38、ng horizontal media. This media choice should be based on present and projected needs. 1) Four-pair 100-ohm cable, either category 5e or category 6, cable as specified in ANSI/TIA/EIA-568-B.2 and ANSI/TIA/EIA-568-B.2-1. 2) Two-fiber multimode optical fiber cable, either 62.5/125 m or 50/125 m as spe
39、cified in ANSI/TIA/EIA-568-B.3 and ANSI/TIA/EIA-568-B.3-1 ANSI/TIA/EIA-568-B.2, ANSI/TIA/EIA-568-B.2-1 and ANSI/TIA/EIA-568-B.3 requirements on compatible connectors shall be met. See subclause 6.2 for work area outlet/connector specifications. 5.3 Recognized cables Due to the wide range of services
40、 and site sizes where backbone cabling will be used, more than one transmission medium is recognized. This Standard specifies transmission media, which shall be used individually or in combination in the backbone cabling. The recognized media are: a) 100-ohm category 3, category 5e or category 6 twi
41、sted-pair cable (ANSI/TIA/EIA-568-B.2 and ANSI/TIA/EIA-568-B.2-1) b) multimode optical fiber cable, either 62.5/125 mm or 50/125 mm (ANSI/TIA/EIA-568-B.3 and ANSI/TIA/EIA-568-B.3-1) c) singlemode optical fiber cable (ANSI/TIA/EIA-568-B.3) Recognized cables, associated connecting hardware, jumpers, p
42、atch cords, equipment cords, and work area cords shall meet all applicable requirements specified in ANSI/TIA/EIA-568-B.2, ANSI/TIA/EIA-568-B.2-1, and ANSI/TIA/EIA-568-B.3, and ANSI/TIA/EIA-568-B.3-1. NOTES 1 Crosstalk between individual, unshielded twisted-pairs may affect the transmission performa
43、nce of multipair copper cables. Annex B provides some shared sheath guidelines for multipair cables. 2 Annex C provides a brief description of a number of other backbone cables that have been used in telecommunications. These cables, as well as others, may be effective for specific applications. Alt
44、hough these cables are not part of the requirements of this Standard, they may be used in addition to the minimum requirements of this Standard. 2Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without lice
45、nse from IHS-,-,-TIA-568-B.1-4 3 See subclause 5.5 for backbone cabling distance limitations. 5.5.1 Intra and interbuilding distances The maximum supportable distances are application and media dependent. The maximum backbone distances specified in figure 5-2 are guidelines based on voice transmissi
46、on for balanced twisted-pair cabling (maximum 800 m 2624 ft) and the applications listed in annex E for optical fiber cabling. The distances given are for the total backbone channel length, including backbone cable, patch cords or jumpers, and equipment cable. To minimize cabling distances, it is of
47、ten advantageous to locate the main cross-connect near the center of a site. Cabling installations that exceed these distance limits may be divided into areas, each of which can be supported by backbone cabling within the scope of this Standard. Interconnections between the individual areas, which a
48、re outside the scope of this Standard, may be accomplished by employing equipment and technologies normally used for wide area applications. The length of category 3 multipair balanced 100-ohm backbone cabling, that supports applications up to 16 MHz, should be limited to a total of 90 m (295 ft). T
49、he length of category 5e multipair balanced 100-ohm backbone cabling, that supports data applications up to 100 MHz, should be limited to a total distance of 90 m (295 ft). The length of category 6 multipair balanced 100-ohm backbone cabling, that supports data applications up to 250 MHz, should be limited to a total distance of 90 m (295 ft). The 90 m (295 ft) distance allows for an additional 5 m (16 ft) at each en
