Optical Fiber To The Home user (FTTH: Fiber To The Home) is The use of optical Fiber transmission medium To connect communications agency access mode of The client and family homes, exclusive To The introduction of optical Fiber by a single family homes.On the physical Network composition, FTTH between OLT and ONU using the Optical fiber access, will be deployed to the homes of residents users, ONU light node as ONU called ONT (Optical Network Terminal), directly provide UNI household Network interface connection.
In the FTTH network, whether villa or multi-storey residential, ONU is placed in the user home, between OLT and ONU using passive optical distribution network, in GPON system, mainly optical divider and optical fiber composition, OLT can be placed in the far side side board room, computer room can also be placed in village, the concrete can be based on actual conditions. FTTB network structure in the ONU points need to solve the problem of power supply, can be used in a household 220 v power supply directly or through UPS power supply.
OLT and ONU side provides high-speed data access interface, for data service has a natural connection. By ONU Ethernet interface provides the user's access to broadband Internet access, according to the present stage of broadband application, the actual user authentication and management still can be finished by the BRAS, to maintain consistency with the existing user management way. Access of data business, mainly is the need to adopt appropriate QoS policies, according to the different QoS guarantee of different operations, which provide different bandwidth for different business quality and business