Openreach FTTP ONT
This page is about the FTTP termination device that Openreach install for FTTP customers. ONT stands for Optical Network Terminal, sometimes (mistakenly) called an openreach modem. CityFibre use a different ONT - we have a separate page on that: [CityFibre ONT]
Summary:
- A working Openreach unit has green: power, PON & LAN lights, anything else indicates a problem.
- Your PPPoE capable router will plug in to the LAN port and connect you to the internet.
More info
- Newer ONT installs do not include a Battery Backup Unit (BBU) See: 999_and_faults
- Older Openreach ONT (Optical Network Termination) such as the one pictured, is actually inside the enclosure. This also contains a Battery Backup Unit (BBU) along with various wiring and cable management.
- The ONT requires power, so will need a mains power socket nearby.
- Where provided, the battery has a short warranty, and should be maintained by the end user, however, the battery is to keep the unit powered so that the TEL ports can be used during a power outage - we don't use the TEL ports, so you will want to make other arrangements for using a phone during a power outage - eg a mobile phone. See: 999_and_faults
Openreach ONT LED Status
| LED | Colour | Meaning | Notes | ||
|---|---|---|---|---|---|
| Top (ONT) LEDs | |||||
| TEL1 | Off | We don't use the Tel ports | |||
| PORT1 or LAN | Blinking/Flashing green | Data being transmitted | Good | ||
| Off | ONT has no ethernet link to the router | Bad. Check the connection/cable to the router | |||
| LOS (Loss of service) PON (Passive Optical Network) |
PON solid 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 solid red | Possible fault with the fibre | Bad. Check fibre not damaged, reconnect fibre, power cycle ONT | |||
| POWER | Solid green | Device has power | Good | ||
| Off | Power is off | Bad. Check mains power and connection to BBU/ONT | |||
| Bottom right (BBU) LEDs | |||||
| STATUS | Solid green | Good | |||
| Off | |||||
| FAULT | Solid red | Battery fault | Bad. Replace the AA batteries inside | ||
| Off | Good. No fault | ||||
| CHARGING | Solid orange | Batteries are not fully charged | Wait; the batteries are charging (usually after a power cut) | ||
| Off | Batteries are not being charged | Good. The batteries are fully charged | |||