What is an ONT on a full-fibre connection?

Fibre carries information as light. The ONT terminates the incoming fibre and presents a network connection that the broadband router can use. It also reports status to the access network. The retail provider supplies or specifies the router that creates the local wired and Wi-Fi network.

The incoming fibre connects to the ONT. An Ethernet cable runs from the ONT's data port to the router's WAN or internet port. Both devices need power. Additional switches, access points or mesh units connect on the router side of the network.

Choose a dry, accessible place near a mains socket and a practical fibre route. Consider how Ethernet will reach the router or office network. Avoid positions likely to be blocked by furniture, exposed to moisture or repeatedly unplugged.

Labels vary by ONT model, but indicators commonly cover power, optical connection and Ethernet activity. Do not stare into or disconnect the fibre connector. If service fails, note the light pattern, check power and Ethernet, restart only as directed and give the provider the observed status.

The ONT connects the property to the fibre network. The router authenticates or establishes the retail internet service and distributes it to devices. Replacing a router does not normally replace the ONT, and moving the ONT usually requires an engineer.

The ONT requires electricity. If the ONT or router loses power, broadband and internet-based voice services normally stop. Customers who rely on connectivity for safety, care or business-critical use should discuss resilience and power-backup needs with their provider.