In short, the terminal box is the last structured node of the Fiber Optic System before service touches the subscriber. A typical PON topology (GPON, XGS-PON, or 25G PON) flows OLT → fiber distribution hub → passive splitters → distribution/drop fibers → premises. The OpenReach box has been installed at the rear of my house by the kitchen, but the current internal router is at the front of the house in the living room. It converts the fibre signal entering your home into a connection your router can use. By understanding the components, types, and differences between various fiber management devices, businesses can make informed decisions when deploying and maintaining their fiber. The ONT is a box that sits directly at the entry point to your home and receives light signals from fiber optic cables.