Indoor ONTs are installed inside your home, typically in a utility room, basement or another centralized spot. Its main function includes converting optical signals from the Optical Distribution Network (ODN) into electrical signals, and further. Fiber internet works by sending data as beams of light through tiny glass strands (yes, really!). But your home devices — like your laptop, smartphone and smart TV — can't interpret light signals. A passive splitter that takes one input and broadcasts it to as many as 32 users cuts the cost of the links substantially by sharing, for example, one expensive laser. An optical receiver is a device that converts light signals traveling through fiber optic cable back into electrical signals that electronic equipment can process. It's the endpoint of any fiber optic link, sitting at the far end of the cable and translating pulses of infrared light into the ones. What is the Openreach box on your wall? It's called an Optical Network Terminal, or ONT. It's specific to Full Fibre broadband, and it's completely normal to. ONT is an interface between the Internet Service Provider (ISP) and the end user of fiber Internet. In other words, it works as a modem if you get your.