What is characterized as a "backbone cabling" system?

A backbone cabling system is defined as a part of the telecommunications infrastructure that is responsible for connecting different parts of a network, particularly between various telecommunications rooms or different buildings. This type of cabling typically handles the primary distribution of signals and data across long distances, which supports the interconnection of horizontal runs and other telecommunications elements.

This system often includes high-capacity cabling compatible with the required bandwidth and may include fiber optic cables or high-performance copper cables, depending on the design and performance needs of the network. The key importance of backbone cabling lies in its role in ensuring reliable communication and robust connectivity across multiple areas, which is critical in larger or distributed networks.

The other options refer to cabling types that serve more localized or specific purposes, such as connecting individual offices, workstations, or external network links, rather than facilitating interconnections between distinct telecommunications rooms or buildings.