The FTTH network is mainly realized with an ODN network. It is the network between the OLT (Optical Line Terminal) in server room and the ONU (Optical Network Unit) in end-users’ house. Therefore, ODN provides a transmission channel between data centre and end users.
As is shown above, an ODN (Optical Distribution Network) network is divided into 3 subsystem in 3 colors, which are backbone optical cable subsystem, distribution optical cable subsystem, and access optical cable terminal subsystem. In ODN, the optical cable network are the most essential infrastructure for it handles all the optical information transmission. Fibre optic cable in FTTH network is divided into backbone fibre optic cable, distribution optical cables and FTTH drop cable.
In addition, the ODN is also composed of various fibre optic products such as ODF, fibre patch panel, fibre cabinet, fibre splice closure, fibre optic distribution box. They connect all the optical cables and make the whole optical communication system organized and of highly performance.