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568-C.1 Commercial Building Cabling Standard
568-C.2 Copper Cabling and Components Standard
568-C.3 Fiber Cabling and Components Standard
568-C.4 Broadband Coaxial Cabling and Components Standard
The TIA 568 series standards should be used with the following complementary standards:
222 Standard for Antenna Supporting Structures and Antennas
569 Telecommunications Pathways and Spaces
598 Fiber Optic Color Coding
606 Administrative Standard for Telecommunications Infrastructure
607 Standard for Commercial Building Grounding (Earthing) and Bonding Requirements for
758 Customer-owned Outside Plant Telecommunications Infrastructure Standard
942 Telecommunications Infrastructure Standard for Date Centers
TIA-568-C defines a hierarchical cable system architecture, in which a main cross-connect (MCC) is
connected via a star topology across backbone cabling to intermediate cross-connects and horizontal cross-
connects, also known as “distribution frames”. Horizontal cross-connects provide a point for the
consolidation of all horizontal cabling, which extends in a star topology to individual work areas such as
cubicles and offices.
Under TIA 568-B, the maximum allowable horizontal cable distance is 100m including 10 m of patch cords.
No patch cord should be longer than 5 m.
Structured cabling standards specify generic installation and design topologies that are characterized by a
“category” or “class” of transmission performance.
Calling out compliance with widely accepted standards seeks to assure that the applications will be
operable; that cable and connectivity choices are backward compatible and interoperable; and that the user
will receive a structured cabling design and topology which is universally recognized by cabling
professionals responsible for managing cabling additions, upgrades, and changes.
Specifications for TIA structured copper network cabling are differentiated by their requirements for
bandwidth, signal quality, and resistance to interference from external sources. Category 5 and Category 6
cabling use unshielded twisted pair copper cables. These two types, and manufacturer variants thereof
which were developed to exceed the performance of the standard, are by far the mostly common types
found in airport premise systems. Category 7 uses shielded copper cable.
The TIA Standards are generally specified for U.S. applications. International Organization for
Standardization (ISO) standards generally apply outside of North America, but regional cabling standards
groups such as JSA/JSI (Japanese Standards Association), CSA (Canadian Standards Association),
and CENELEC (European Committee for Electro-Technical Standardization) also develop local
specifications. All of these standards bodies coordinate their efforts, and while the terms used may differ,
the technical specifications for like applications are generally well synchronized.
In TIA Standards, cabling components (e.g. cables, connecting hardware, and patch cords) are characterized
by a performance “category”, generally a numerical value such as Category 6. In ISO, components are
characterized by a performance “category” and are identified by a letter indicating a “class”.
TIA and ISO standards, which govern the performance and classifications of structured cabling, are shown
in Table(s) 9-2a and 9-2b.
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