Structured cabling is building or campus telecommunications cabling infrastructure that consists of a number of standardized smaller elements (hence structured) called subsystems.

Structured cabling falls into six subsystems:

• Demarcation Point is the point at which the telephone company network ends and connects with the wiring at the customer premises.
• Equipment or Telecommunications Rooms house equipment and wiring consolidation points that serve the users inside the building or campus.
• Vertical or Riser Cabling connects between the equipment/telecommunications rooms, so named because the rooms are typically on different floors.
• Horizontal wiring can be IW (inside wiring) or Plenum Cabling
  Plenum cable
  Plenum cable is cable that is laid in the plenum spaces of buildings. The plenum is the space that can facilitate air circulation for heating and air conditioning systems, by providing pathways for either heated/conditioned or return airflows...
  
  connects telecommunications rooms to individual outlets or work areas on the floor, usually through the wireways, conduits or ceiling spaces of each floor.
• Work-Area Components connect end-user equipment to outlets of the horizontal cabling system.

Structured cabling design and installation is governed by a set of standards that specify wiring data center

Data center

A data center is a facility used to house computer systems and associated components, such as telecommunications and storage systems...

s, office

Office

An office is generally a room or other area in which people work, but may also denote a position within an organization with specific duties attached to it ; the latter is in fact an earlier usage, office as place originally referring to the location of one's duty. When used as an adjective, the...

s, and apartment buildings for data or voice communications using various kinds of cable, most commonly category 5e

Category 5 cable

Category 5 cable is a twisted pair cable for carrying signals. This type of cable is used in structured cabling for computer networks such as Ethernet. It is also used to carry other signals such as telephony and video. The cable is commonly connected using punch down blocks and modular connectors...

 (CAT-5e), category 6

Category 6 cable

Category 6 cable, commonly referred to as Cat 6, is a cable standard for Gigabit Ethernet and other network physical layers that is backward compatible with the Category 5/5e and Category 3 cable standards. Compared with Cat 5 and Cat 5e, Cat 6 features more stringent specifications for crosstalk...

 (CAT-6), and fibre optic cabling and modular connector

Modular connector

Modular connector is the name given to a family of electrical connectors originally used in telephone wiring and now used for many other purposes. Many applications that originally used a bulkier, more expensive connector have now migrated to modular connectors...

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