Structured Cabling System A structured cabling system is an assembly of different components that, when combined efficiently, provide the optimum infrastructure for a wide range of business communication uses. Structured cabling companies make up this assemblage of 6 subsystems, each with their specific function and their own subsystems and components. The 6 structured cabling subsystems include: Horizontal Cabling, Vertical Cabling, Entrance Facility Structured Cabling, Consolidation.