Early optical transmission system due to the large loss of light, the accuracy of the working connector is not enough, so the use of direct cable terminal method. The specific method is to line side of the fiber and the end of the tail pipe in the terminal box to do a fixed connection. With the improvement of optical device technology, taking into account the layout of the engine room and scheduling convenience, the current use of fiber distribution terminal.
The fiber distribution terminal can be grouped and protected up to 144 pigtail connectors, and the fiber optic cable can be introduced into the transmission device via the transfer board. The modular distribution terminal is designed according to the ITT cabinet in which the center body is installed. A specially designed transfer plate is mounted above the center body. The entire package is enclosed in an aluminum box. There are two kinds of aluminum box size, a high 26cm, can accommodate 72 fibers. Another 44cm high, can hold 144 fibers. The structure of the aluminum box allows the cable to enter from the top or bottom. The main advantage of FDT is to provide users with a clear distinction between the inside and outside the responsibility of the factory boundaries. The fiber distribution terminal is used for a single dwelling unit. The fiber distribution point terminal may be underground or ceiling. The terminal off and the required attributes of the component will vary depending on the antenna or ground.
The basic function of the fiber distribution terminal is to provide fiber distribution points (FDP) between the distribution cable and the customer service cable. It must be waterproof when installed in an external environment. In addition to facilitating the storage and movement of the closures during the transmission process to prevent fiber damage.
The fiber distribution terminal can be fed directly from the switch or dispensing connector via cable. It will provide a connector terminal for accommodating the specified customer location. This type of arrangement requires a spliced organizer tray and an appropriate protection for the fiber optic connector in the form of a protective enclosure.