Openreach FTTP ONT
This page is about the FTTP termination device that Openreach install for FTTP customers.
Older Openreach ONT (Optical Network Termination), such as the one pictured is actually inside an enclosure which also contains a Battery Backup Unit (BBU) and various wiring.
Newer ONT installs do not include the BBU, and are also not in a larger enclosure.
The ONT requires power, so will need a mains power socket nearby.
LED Status
| LED | Colour | Meaning | Notes |
|---|---|---|---|
| Power | Green | Device has power | Good |
| Off | Power is off | Bad. Check mains power | |
| PON & LOS (Passive Optical Network Loss of service) |
PON green, LOS Off | Connected and should be working | Good. This is how it should be normally |
| PON flashing green, LOS off | ONT is starting up | Wait a bit for steady green and all should be well... | |
| PON off, LOS red | Possible fault with the fibre | Bad. Check fibre not damaged, reconnect fibre, power cycle ONT | |
| PORT1 | Off | ONT has not ethernet link to the router | Bad. Check the connection/cable to the router |
| Blinking/Flashing | Data being transmitted | Good | |
| Tel | We don't use the Tel ports | ||
| Status/Fault/Charging | Related to the battery backup | The 'fault' LED indicated a fault with the battery, and not related to a fault with the FTTP service. |