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| Two types of cables are recognized and recommended for use in the horizontal cabling system. These cables are:

1. four-pair 100 Ohm unshielded twisted-pair (UTP) or screened twisted-pair (ScTP) cables, 0.51 mm (24 AWG) to 0.64 mm (22 AWG) in diameter.

> NOTE: Performance requirements for cables specified in ANSI/TIA/EIA-568-B.2.

> The recognized categories of UTP cabling are:

> - Category 5e: This designation applies to 100 Ohm UTP cables and associated connecting hardware whose transmission characteristics are specified up to 100 MHz.
> - Category 3: This designation applies to 100 Ohm UTP cables and associated connecting hardware whose transmission characteristics are specified up to 16 MHz.
> - Categories 1, 2, 4 and 5 cables and connecting hardware are not recognized as part of ANSI/TIA/EIA-568-B.1 and ANSI/TIA/EIA-568-B.2, therefore their transmission characteristics are not specified.

2. two or more cores of optical fiber multimode cable, either 62.5/125 µm or 50/125 µm cables.

> NOTE: Performance requirements for cables specified in ANSI/TIA/EIA-568-B.3. See a later section in this document for fiber performance.

Requirements

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 and ANSI/TIA/EIA-568-B.3.

When bundled and hybrid cables are used for horizontal cabling, each cable type shall be recognized and meet the transmission performance and color-code specifications for that cable type given in ANSI/TIA/EIA-568-B.2 and ANSI/TIA/EIA-568-B.3.

> NOTE: 1 - Hybrid cables and bundled cables are those cables that are assembled prior to installation, sometimes referred to as loomed, speed-wrap, or whip cable constructions.

> NOTE: 2 - There are a number of other application specific horizontal cable types that have been used in telecommunications. Although these cables are not part of the requirements of the ANSI/TIA/EIA-568-B.1, ANSI/TIA/EIA-568-B.2 and ANSI/TIA/EIA-568-B.3 standards, they may be used in addition to the minimum requirements described above.

> NOTE: 3 - Hybrid cables consisting of optical fiber cores and copper conductors are sometimes referred to as composite cables.

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