Structured cabling

Structured cabling
In telecommunications, structured cabling is building or campus cabling infrastructure that consists of a number of standardized smaller elements (hence structured) called subsystems.
Structured cabling falls into six subsystems:
Entrance facilities is the point where the telephone company network ends and connects with the on-premises wiring at the customer premises.
Equipment rooms house equipment and wiring consolidation points that serve the users inside the building or campus.
Backbone cabling is the inter-building and intra-building cable connections in structured cabling between entrance facilities, equipment rooms and telecommunications closets. Backbone cabling consists of the transmission media, main and intermediate cross-connects and terminations at these locations. This system is mostly used in data centers.
Horizontal cabling wiring can be IW (inside wiring) or plenum cabling and connects telecommunications rooms to individual outlets or work areas on the floor, usually through the wire ways, conduits or ceiling spaces of each floor. A horizontal cross-connect is where the horizontal cabling connects to a patch panel or punch up block, which is connected by backbone cabling to the main distribution facility.
Telecommunications rooms or telecommunications enclosure connects between the backbone cabling and horizontal cabling.
Work-area components connect end-user equipment to outlets of the horizontal cabling system.
Network cabling standards are used internationally and are published by ISO/IEC, CENELEC and the Telecommunications Industry Association (TIA).
Most European countries use CENELEC, IEC or ISO standards which are widely accepted in most parts of the world and internationally recognized, the main CENELEC document being EN50173, which introduces contextual links to the full suite of CENELEC documents. ISO/IEC 11801 heads the ISO/IEC documentation.
The Telecommunications Industry Association (USA) issue the ANSI/TIA-568 standards for telecommunications cabling in commercial premises:
ANSI/TIA-568.0-D, Generic Telecommunications Cabling for Customer Premises, 2015
ANSI/TIA-568.1-D, Commercial Building Telecommunications Infrastructure Standard, 2015
ANSI/TIA-568-C.2, Balanced Twisted-Pair Telecommunication Cabling and Components Standard, published 2009
ANSI/TIA-568-C.3, Optical Fiber Cabling Components Standard, published 2008, plus errata issued in October, 2008.
TIA-569-B (2004; Amd 1 2009) Commercial Building Standard for Telecommunications Pathways and Spaces
ANSI/TIA/EIA-606-A-2002, Administration Standard for Commercial Telecommunications Infrastructure.