Arris CM8200 for nbn HFC Status Lights

Checking the status lights on your nbn Connection Box (NCB) for nbn HFC can be useful for troubleshooting.

This model was supplied before 1 October 2024. If you got your NCB after this date, you'll have the Arris CM3500.

Things to note

Note that ONLINE, DOWNSTREAM and UPSTREAM lights will all FLASH briefly when the Connection Box is powered on. This is a self-test and no action is needed, just wait for the Connection Box to finish booting up.
If both UPSTREAM and DOWNSTREAM lights are FLASHING but ONLINE light is OFF, there is no connection to the nbn. Please call us on 13 22 58 for assistance.
If both UPSTREAM and DOWNSTREAM lights are FLASHING and ONLINE light is ON, a firmware update is in progress. No action is needed - simply wait for the update to complete.

The UNI-D1 port on the back of the Connection Box has LINK lights to indicate cable connection to a computer or router.

Green: Cable connection detected. If this light is off, try another CAT5e or CAT6 Ethernet cable.
Yellow: Old CAT5 Ethernet cable is in use - this may not allow throughput of the full speed of your nbn HFC service.

Light	State		Meaning
POWER	Off		Connection Box has no power.
POWER	Green		Connection Box has power.
DOWNSTREAM		Off	Connection Box has no power.
		Green	Successful downstream connection.
		Flashing	Searching for downstream connection. If ONLINE light is on, firmware upgrade in progress.
UPSTREAM		Off	Still searching for downstream connection, or Connection Box has no power.
		Green	Successful upstream connection.
		Flashing	Downstream connection found; searching for upstream connection. If ONLINE light is on, firmware upgrade in progress.
ONLINE		Off	Connection Box is offline or has no power.
		Green	Connection Box is online and browsing should be possible.
		Flashing	Downstream and upstream connection found; retrieving setup information from nbn.