The lights on your modem and nbn® connection box tell you what's happening with your internet connection. Knowing what each light means can help you quickly identify if your service is working properly — or where the issue might be.

While different modem brands have slightly different light labels, most follow the same general patterns.

Common modem lights explained

Power light: A solid light means your modem is on and receiving power. If this light is off, your modem is not powered — make sure the power cable is plugged in securely and the outlet is switched on.

Internet / WAN light: A solid light means you're connected to the internet. If it's flashing, your modem is connecting or transmitting data. If this light is off, no connection has been detected — check your nbn® box is connected and powered on, then restart both your modem and nbn® device.

DSL / Line light: A solid light means the line is active and stable. Flashing indicates the modem is attempting to sync. If this light is off, there's no signal on the line — make sure your phone cable is plugged in securely and try a different wall socket or cable.

Wi-Fi / WLAN light: A solid light means Wi-Fi is on. Flashing indicates devices are connected and using data. If this light is off, Wi-Fi is disabled — turn it back on via your modem's settings or press the Wi-Fi button (if available).

LAN / Ethernet light: A solid light means a device is connected via cable. Flashing indicates active data transfer. If this light is off, no device is connected — check your Ethernet cables are firmly plugged in and not damaged.

WPS light: A flashing light means WPS pairing is in progress. A solid light means a device has connected via WPS. If this light is off, WPS is not active. If the light flashes for more than 2 minutes, restart the modem and reconnect your device manually.

USB light: A solid or flashing light means a USB device has been detected and is active. If this light is off, no USB device is connected. Safe to ignore unless you're using a USB device with your modem.

nbn® connection box lights

If you have an nbn® connection box (FTTP, FTTC, or HFC), it also has its own status lights.

FTTP (Fibre to the Premises):

• Power — Solid green means the device is on.
• Optical — Solid green means the fibre link is active; red indicates a fault detected.
• UNI-D — Solid or flashing green means data is being transmitted.

FTTC (Fibre to the Curb):

• Power — Solid blue means the device is on.
• Connection — Solid blue means connected to the network; flashing means syncing.
• DSL / LAN — Solid means active link to modem; off means no link.

HFC (Hybrid Fibre Coaxial):

• Power — Solid means on.
• Downstream / Upstream — Flashing means syncing; solid means locked.
• Online — Solid means connected; off means no internet.

If any of these lights stay off or red for more than five minutes after power-up, it usually means the connection hasn't been established yet.

What to do if your lights don't look right

1. Restart your modem and nbn® box — unplug them for 30 seconds, then power them back on.
2. Check your cables — make sure everything is firmly connected and undamaged.
3. Wait a few minutes — lights can take time to stabilise during activation or after power loss.

Need help?

Include a photo of your modem and nbn® box lights when contacting us, as this helps our team identify the issue quickly.

1. Visit our website and speak to Eve, our AI assistant, in the bottom right corner of the screen.
2. If you'd rather chat with a human, just let Eve know and you'll be transferred to a real person within the same chat window.
3. Head over to the homepage of our help centre and submit a ticket.
4. Email us at support@ezibroadband.com.au
5. Call us on 132 EZI (132 394).