ONT

Meaning

An ONT, or optical network terminal, is a small box that converts the light signal from a fibre line into electrical signals a router can use. Some services call it an ONU. In a fibre-to-the-home installation it is the point where the fibre ends inside your home, and it needs electricity, so it goes down in a power cut unless backed up. Sometimes the ONT and router are combined in one unit. Keep it ventilated and away from sun and water. See also: FTTH, Router, and the guide FTTH Explained: Fibre to the Home in Plain Language.