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TIA/EIA-568 is a set of telecommunications standards from the Telecommunications Industry Association (TIA), an offshoot of the Electronic Industries Alliance (EIA). The standards address commercial building cabling for telecommunications products and services. , the standard is at revision C, replacing the 2001 revision B, the 1995 revision A, and the initial issue of 1991, which are now obsolete.〔Andrew Oliviero, Bill Woodward "Cabling: The Complete Guide to Copper and Fiber-Optic Networking", John Wiley & Sons, 2009 ISBN 0470550058 page 68〕〔(【引用サイトリンク】url=http://www.tiaonline.org/standards/about/documents/StarReport_10-11.pdf )〕 Perhaps the best known features of TIA/EIA-568 are the pin/pair assignments for eight-conductor 100-ohm balanced twisted pair cabling. These assignments are named T568A and T568B. An IEC standard ISO/IEC 11801 provides similar standards for network cables. ==History== TIA/EIA-568 was developed through the efforts of more than 60 contributing organizations including manufacturers, end-users, and consultants. Work on the standard began with the EIA, to define standards for telecommunications cabling systems. EIA agreed to develop a set of standards, and formed the TR-42 committee,〔(【引用サイトリンク】title=TR-42 - Telecommunications Cabling Systems )〕 with nine subcommittees to perform the work. The work continues to be maintained by TR-42 within the TIA. The first revision of the standard, TIA/EIA-568-A.1-1991 was released in 1991. The standard was updated to revision B in 1995. The demands placed upon commercial wiring systems increased dramatically over this period due to the adoption of personal computers and data communication networks and advances in those technologies. The development of high-performance twisted pair cabling and the popularization of fiber optic cables also drove significant change in the standards. These changes were first released in a revision C in 2009 which has subsequently received minor maintenance updates. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「TIA/EIA-568」の詳細全文を読む スポンサード リンク
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