Our Professional Answer: A backbone cable laying structure is the central framework of a network that provides high-capacity interconnection between different buildings, floors, or telecommunications rooms within a building. It is the main artery of the network, designed to handle large volumes of data over long distances. This differs from horizontal cabling, which connects individual workstations to a telecommunications room. The structure includes the cables themselves, pathways (such as conduits, trays, and shafts), connecting hardware (like patch panels and cross-connects), and supporting facilities.