Optical access network is the access network with light as the transmission medium, instead of copper wire. It is used to connect to every family. The optical access network is composed of three parts: OLT (Optical Line Terminal, optical line terminal) and ONU (Optical Network Unit, optical network unit) and ODN (Optical Distribution Network, optical distribution network). The core component of optical access network.

OLT is the core component of the optical access network, which is equivalent to the switches or routers in the traditional communication network, and it is also a multi service platform. It is usually placed at the local end to provide a user oriented passive optical fiber network interface. 


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