A fiber distribution hub (FDH) is a housing used to provide the connection between fiber optic cables and passive splitters in an external factory segment of the network. It makes connecting and reconfiguring services easy, fast, and used as a test point in an external factory network. If the cabinet is equipped with factory pre-connected feeder and distribution cable heads, it helps to ensure fast, easy and reliable field installation. Fiber distribution hubs vary in size and shape, depending on the location in the network and the number of customers that need to be serviced.

The best available technologies in the early days of Fiber to the Home (FTTH) limited manufacturers to large metal cabinets. When the cabinet is placed on the ground in a utility, there is little objection from the carrier or homeowner. Cabinets are usually placed on concrete slabs or utility poles. Today's story is very different. Allowable restrictions, vandalism and security are the primary issues when discussing cabinet placement.

The Optical Fiber Distribution Box provides the connection between the fiber optic cable and the passive splitter in the network segment of the external device. Good FDHs provide high-density fiber optic connections for compact, weather-resistant enclosures to meet increasingly stringent licensing regulations.