The portion of the telecommunications cabling system that connects work area outlets to telecommunications outlets and typically runs horizontally along a building’s floors or ceilings. The horizontal cabling system starts with faceplates and jacks and ends at horizontal cross-connects in the telecom closet. Faceplates, jacks, the horizontal cables, the wireways in which the cables are housed, and the horizontal cross-connect are all considered to be part of the horizontal cabling system. Compare backbone cabling