What do the lights mean on my Home Internet modem?

In the article, we'll show you what the lights indicate on your nbn® equipment and Home Internet modems.

If you're having an issue connecting to the Internet, you can also see our interactive troubleshooting steps in the My Optus app under Help → nbn troubleshooting tips.

Select your nbn technology type to see what the lights indicate on your nbn equipment. You can check your type of connection by entering your address here.

Fibre to the Premise (FTTP)

Fibre to the Premises (FTTP)

Here's what each light signal on your Connection Box means and what to do:

Note: If you can't see the lights, remove the cover by pressing the two clips at the base upward, then pulling the bottom of the cover out and up to remove it completely.

Power light

Status	Meaning
Green	• The box has power • Skip to Check your modem's internet connection section
Flashing green	• The box is starting up – allow 15 mins for setup to finish
Red	• The box is running on battery • The internet connection won’t work until the power is turned back on
Off	• Check the Connection Box power cable is securely plugged in to a power point and the power point is switched on • Plug your Connection Box directly into a power board • If there's still no power, message us or call 133 937 for help

Optical light

OpticalLight_CB_FTTB

Status	Meaning
Solid green	• The box is connected to the network • Skip to Check your modem's internet connection section
Flashing green	• The box is connected and sending data. This is normal • Skip to Check your modem's internet connection section
Red	• The box has lost connection • Message us or call 133 937 for help
Off	• The box has lost connection • Message us or call 133 937 for help

Fibre to the Curb (FTTC)

Here's what each light signal on your Connection Device means and what to do:

Connection light display

Status	Action
Off	• Make sure the cable connecting the Device to the wall socket is securely connected and in good order • Plug your Connection Box directly into a wall socket (not a power board)
Solid / blinking red	• There is no connection to the nbn network • Message us or call 133 937 for help
Blinking blue	• The Device is in the process of setting up • Wait for the light to turn steady blue then test your internet connection
Solid blue	• The Device is connected

DSL / Internet light

Status	Action
Off	• There's no connection to the internet • Message us or call 133 937 for help
Blinking blue	• The Device is in the process of setting up • Wait for the light to turn steady blue then test your internet connection
Solid blue	• The Device is connected

LAN light

Status	Action
Off	• Check that the nbn Connection Device is plugged into the WAN / Internet port of your modem
Blinking blue	• Your Connection Device and modem have a secure connection

nbn Cable

Here's what each light signal on your Connection Device means and what to do.

Light display

Status	Meaning / action
All lights are steady green	• Your nbn Connection Box is working
Online: Off Downstream / DS: Flashing Upstream / US: Flashing	• There's no internet connection • Check the nbn Connection Box is securely plugged in and power point is switched on • Ensure the coaxial cable connecting your nbn Connection Box to the wall is securely screwed in at each end • If you're still not connected to the internet, message us or call 133 937 for help
Online: On Downstream / DS: Flashing Upstream / US: Flashing	• Your nbn Connection Box is updating its firmware • Allow up to 30 mins for the update to complete and the lights to return to steady green

Fixed Wireless

Here's what each light signal on your Connection Box means and what to do:

Light	Action
Power	Off: Check the Connection Box is plugged in and the power is switched on Red: The connection Box is running on battery power and the battery is low Solid / flashing green: Connection Box is operating normal
Status	Red: Reset the Connection Box by turning it off at the power point, waiting 30 seconds then turning it back on. Allow a few minutes for the lights to settle into a stable pattern Blinking amber: The device is starting up. Wait for the light to settle to a steady green, then try your internet connection again Solid / flashing green: Connection Box is operating normal
ODU	Solid red: Reset the Connection Box by turning it off at the power point, waiting 30 seconds then turning it back on. Allow a few minutes for the lights to settle into a stable pattern. If the ODU light stays red after the reset, message us or call 133 937 for help Blinking red: There is an error. Message us or call 133 937 for help Solid / flashing green: Connection Box is operating normal
Signal Indicator	The colour of the light (red, amber or green) indicates the strength of the wireless signal. No action is necessary for this light

Check your modem's internet connection

Check your modem's Internet light:

On: You have an Internet connection
Off: Check the cable connecting your modem to your wall socket / nbn equipment is securely plugged in at each end, then restart your modem

Optus Ultra WiFi (Gen 2) modem	Optus Ultra WiFi (Gen 1) modem	Sagemcom F@st 5366 TN modem

If you're using a non-Optus supplied modem, see Setting up your BYO modem for help.

Optus Ultra WiFI (Gen 2) modem lights

Here's what each light signal on your modem means:

Indicator	Status	Description
Power	Solid green	On, modem PSU plugged in and powered up
Power	Device is powered off	Off, no power
DSL	Solid green	Sync successful
	Flashing green	Sync in progress
	Off	No sync
Internet	Solid blue	LTE up with WAN IP address
	Flashing blue	LTE activating
	Solid red	DHCP timout after 10 miutes, DHCP error, etc (Note. DHCP protocol will be persistent even with red LED)
	Solid green	WAN or XSL IP address assigned
	Flashing green	DHCP handshake in progress
	Off	No connectivity and no WAN IP address
Wi-Fi	Solid blue	2.4GHz and 5GhZ with bank steering turned off
	Solid green	Band steering on
	Flash blue / green	WPS pairing mode
Telephone	Solid green	SIP session provisioned and registered successfully
	Flashing green	SIP accounts are provisioned and registered successfully. Phone is in off-hook state
	Solid red	SIP accounts are provisioned but registered failed
	Off	No SIP accounts provisioned
4G Backup	Solid red	No signal or no connection (e.g. no SIM, invalid SIM etc)
	Solid green	Good signal and medium signal
	Solid orange	Poor signal

Check your WiFi connection

Check that WiFi is on:
- If WiFi light is OFF, turn your modem’s WiFi button ON
- Make sure your computer / device also has WiFi turned ON
Reset the connection:
- Turn your modem and your computer off and leave them off for 60 seconds
- Turn both devices back on and allow a few minutes for them to reconnect
Connect via Ethernet cable
- Use an Ethernet cable to connect your computer directly to your modem, then test your Internet connection
- If you can connect via ethernet, you have identified an issue with your WiFi setup. See your modem user guide for help with your WiFi connection