Hengguang ODF48/72 optical distribution unit is a kind of fiber optical equipment specially used for fiber optical transmission room. It is supported stable fiber, protection, cable terminal capability, transfer lines and to protect the fiber-core and the pigtail. The equipment is made up of ODF-72 optical distribution unit and sub-rack. The capacity of each unit is 72-core at the most. ODF-72 is 19 inches in height and 4U in width, fits the standard sub-rack. 4 cables are enable to be injected into the unit simultaneously. Users base on the actual demand for matching the number of modules or module specifications.