Troubleshoot by Optical Network Terminal (ONT)

The colours of each LED light on your ALU ONT have different meanings. Use this guide to understand more.

POWER LED

No light: No power is supplied to the ONT. Check the power supply and ensure that the power adapter is secured.

Green: Connected to a power supply

Optical/PON

No light: PON Optical Port is not synchronised. Check that the Fibre connection is established.

Red: Optical Module Power or Signal Loss. Please call 1688 for assistance.

Green: PON Optical Port is synchronised.

LAN

No light: No ethernet connection.

Green (Stable): Connected to an ethernet device.

Green (Blinking): Data is transmitting or receiving between devices

Update

No light: Normal state

Red: Upgrade has failed

Green: Upgrading

ALM

No light: Normal state

Red: Hardware exceptions

Green: Local access

POTS

No light: On hook. Turn off your ONT and turn it on again after 5 min. If the light still does not turn on after 2 min, call 1688 for further assistance.

Green (Stable): Off hook, Home Digital Line is currently in use.

Green (Blinking): Off hook for more than 1 hour.

The colours of each LED light on your Ericsson ONT have different meanings. Use this guide to understand more.

POWER LED

No light: No power is supplied to the ONT. Check the power supply and ensure that the power adapter is secured.

Green: Connected to a power supply

PON

No light: No signal detected. If it takes more than 1 min to stabilise, call 1688 for assistance.

Green (Stable): Fibre connection is established.

Green (Blinking): Fibre is connecting. If it takes more than 1 min to stabilise, call 1688 for assistance.

LAN

No light: No LAN connectivity detected. Check that the ethernet cable is connected to your router and ONT. Both devices need to be powered on.

Green: LAN connectivity detected.

Phone (1 & 2)

No light: Home Digital Line profile is not set up. If you have a Home Digital Line service connected to the ONT but there is no light on Phone2 port, turn off the ONT and turn it on again after 5 minutes. Call 1688 if the issue persists.

Green (Stable): How Digital Line is connected.

Green (Blinking): Handset is off hook or in use.

Troubleshoot by Optical Network Router

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Troubleshoot by Optical Network Terminal (ONT)

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