These changes were first released in a revision C in 2009 which has subsequently been replaced by revision D (named ANSI/TIA-568-D). The development of high-performance twisted pair cabling and the popularization of fiber optic cables also drove significant change in the standards. 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 standard was updated to revision A in 1995. The first version of the standard, TIA/EIA-568, was released in 1991. EIA no longer exists, hence EIA has been removed from the name. The work continues to be maintained by TR-42 within the TIA. EIA agreed to develop a set of standards, and formed the TR-42 committee, with nine subcommittees to perform the work. Work on the standard began with the Electronic Industries Alliance (EIA), to define standards for telecommunications cabling systems. These assignments are named T568A and T568B.ĪNSI/TIA-568 was developed through the efforts of more than 60 contributing organizations including manufacturers, end-users, and consultants. Perhaps the best-known features of ANSI/TIA-568 are the pin and pair assignments for eight-conductor 100-ohm balanced twisted pair cabling. The title of the standard is Commercial Building Telecommunications Cabling Standard and is published by the Telecommunications Industry Association (TIA), a body accredited by the American National Standards Institute (ANSI).Īs of 2020, the revision status of the standard is ANSI/TIA-568-D, published 2015, which replaced TIA/EIA-568-C of 2009, revision B of 2001, and revision A of 1995, and the initial issue of 1991, which are now obsolete. ANSI/TIA-568 is a technical standard for commercial building cabling for telecommunications products and services.

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