Premise Wiring
Horizontal Wiring encompasses all cable from a work-area wall plate or network connection to the telecommunications closet.The outlets, cable, and cross-connects in the closet are all part of the horizontal wiring, which gets its name because the cable typically runs horizontally above ceilings or along the floor.
The telecommunications closet is a room or cabinet that holds distribution frames, cross-connects, and other hardware needed to connect horizontal wiring to backbone wiring. Each building must have at least one wiring closet.
An equipment room houses building telecommunications systems such as PBXs, servers, and the mechanical terminations of the telecomm wiring system. Considered different than a wiring closet because of the complexity of the components it contains, an equipment room nonetheless may take the place of a building’s wiring closet or it may be a separate entity.
