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HFC Modem Lights Explained

Last Updated: Thursday 29 June 2023

A graphic on a white background of the different lights on a Hybrid Fibre Coaxial modem. In the top left corner, there are three indicators - the left-most is a green indicator labelled "On", the middle is a flashing green dot labelled "Flashing",, and the right-most is a grey dot labelled "Off". Below this, there are four headings with text under each. The top heading is "Power" with "Indicates power is available to the box" underneath. The second-top heading is "Downstream" with the text "Indicates downstream connectivity" underneath. The third heading is "Upstream" and the text "Indicates upstream connectivity" underneath, and the bottom heading is "Online" with the text "Indicates NBN network connection" underneath. On the right of the graphic, there is a motif of the HFC box with the indicators for Power, Downstream, Upstream and Online shown on the front..

Power indicatorDownstream indicatorUpstream indicatorOnline indicatorMeaning of sequence
OffOffOffOffNo power to the NBN connection box
OnFlashingFlashingFlashingPower-on self test
OnFlashingOffOffDownstream search
OnOnFlashingOffDownstream found, upstream search
OnOnOnFlashingDownstream and upstream found - retrieving setup information from NBN
OnOnOnOnReady for service

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