What the Openreach modem lights mean

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Types of modem

Types of modem

If you're a fibre customer you might have an Openreach modem (or ONT) installed. This white box connects to a fibre optic cable, which runs directly to your house and allows you to access our fibre network for broadband and voice.

You'll have 1 of the 5 different types of Openreach modem, they all work in the same way, but the type and number of lights varies between device.

Huawei 1-port modem

Lights: Power, Tel, Port, LOS and PON.

Huawei 4-port modem

Lights: Power, Tel (x2), Port (x4), LOS and PON.

ECI modem

Lights: Power, Optical, Tel (x2) and LAN (x4)

ECI C-Series modem

Lights: Power, Optical, Tel (x2) and LAN (x4)

Nokia modem

Lights: Power, PON, LOS and Port

Modem lights

Modem lights

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