For most setups, cables with 12, 24, or 48 cores are common choices, ensuring compatibility with modern equipment and ease of management. IBDN standard suggests using 12-core cables for communication rooms within buildings and 24-core cables for main distribution rooms, which can serve as a. A fiber-optic switch allows you to connect two or more fiber-optic cables to form a network. These can behave like a typical Ethernet switch. With a fiber switch combined with a fiber network adapter, you could connect fiber directly to your desktop computer or server. (actually use a four core optical cable) This is because apart from one-core optical fiber, there are basically no optical cables with an odd number of cores, such as three-core, five-core, etc. Router ports are commonly.