FTTH (Fiber To The Home), the name suggests is an optical fiber directly to the home. Specifically, FTTH refers to the optical network unit (ONU) installed at the home user or business user, a series of optical access user of the optical access network application types except FTTD (fiber to the desk) the closest off. FTTH is a distinctive feature not only provides more bandwidth, but also enhances network data format, speed, wavelength and protocol transparency, relaxes the environmental conditions and power requirements, simplifying maintenance and installation.