Openreach FTTP ONT
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This page is about the FTTP termination device that Openreach install for FTTP customers.
- Newer ONT installs do not include a Battery Backup Unit (BBU)
- 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.
|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|
|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|