Fibre Connection Box lights guide

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The Fibre Connection Box on your wall (the engineers will call this the Optical Network Terminator or ONT) is where the Fibre comes into your home. The lights on your Fibre Connection Box let you know when everything's working as it should be and can tell you what's wrong if you're having problems with your connection. Take a look at our Fibre Connection Box lights guide below for more information about what the different light combinations mean.

Select your Fibre Connection Box

Select the Fibre Connection Box that's installed in your home for more information about what the lights mean. Some types of ONT can differ in looks depending on the manufacturer, but the lights on your ONT will always be the same.

White fibre connection box

Black Fibre connection box

White Fibre Connection Box lights guide

White Fibre Connection Box lights guide

This table shows the lights guide

Light	Status	Description
POWER	Solid green	Your Fibre Connection Box is powered on.
	Off	Your Fibre Connection Box isn't getting any power. Make sure the power supply is plugged into a wall socket and switched on.
PON	Solid green	You're connected to the Full Fibre network.
	Flashing green	Your Fibre Connection Box is trying to connect to the Full Fibre network.
	Off	Your Fibre Connection Box is not connected to the Full Fibre network. Make sure all cables are securely connected.
LOS	Solid red	Your Fibre Connection Box is not connected to the network. Check all cables are connected.
	Off	Your Fibre Connection Box is connected to the network.
PORT 1	Solid green	Data is being sent through the Ethernet cable connected to your Fibre Connection Box and Wi-Fi Hub.
	Flashing green	Data is being sent through the Ethernet connection.
	Off	Your Fibre Connection Box is not connected to your Wi-Fi Hub. Make sure the Ethernet cable is securely connected to the WAN port on your Wi-Fi Hub.

 Black Fibre Connection Box lights guide

This table shows the lights guide

Light	Status	Description
POWER	Solid green	Your Fibre Connection Box is powered on.
	Flashing green	Your Fibre Connection Box is starting up.
	Flashing amber	Your Fibre Connection Box is updating its firmware.
	Off	Your Fibre Connection Box isn't getting any power. Make sure the power supply is plugged into a wall socket and switched on.
BROAD -BAND	Solid green	You're connected to the Full Fibre network.
	Flashing green	Your Fibre Connection Box is trying to connect to the Full Fibre network.
	Flashing red	Your Fibre Connection Box can't connect to the network.
	Off	Your Fibre Connection Box is not connected to the Full Fibre network. Make sure all cables are securely connected.
SERVICE	Solid green	Your internet service is up and running.
	Off	Internet connection cannot be established. Check all cables are securely connected.

This table shows the lights guide

Light	Status	Description
POWER	Solid green	Your Fibre Connection Box is powered on.
	Flashing green	Your Fibre Connection Box is starting up.
	Flashing amber	Your Fibre Connection Box is updating its firmware.
	Off	Your Fibre Connection Box isn't getting any power. Make sure the power supply is plugged into a wall socket and switched on.
BROAD -BAND	Solid green	You're connected to the Full Fibre network.
	Flashing green	Your Fibre Connection Box is trying to connect to the Full Fibre network.
	Flashing red	Your Fibre Connection Box can't connect to the network.
	Off	Your Fibre Connection Box is not connected to the Full Fibre network. Make sure all cables are securely connected.
SERVICE	Solid green	Your internet service is up and running.
	Off	Internet connection cannot be established. Check all cables are securely connected.