ONT Box Alarm Light

[PVD1878]

Ususally , the ONT alarm lamp is unlit.

This evening, it turned steady green.

I was puzzled so I rebooted my Sky router.

The ONT alarm lamp remained steady green.

I rebooted the ONT and the alarm lamp is now steady red.

Strangely, my LAN seems to be working.

What's going on?

[Addie15]

Hi there, I’ve escalated your post to our Community Messaging team who will invite you to a private chat shortly and help you with this. 

Just look out for the colourful bubble to start the conversation.

Here's more information on how Community Messaging works - https://helpforum.sky.com/t5/Did-you-know/Escalating-a-post-to-a-Sky-expert/ba-p/3711147 

[PVD1878]

As you were. The internet dropped momentarily a few minutes later before coming back on and the ONT's lights went back to normal. Obvs, a tech has sorted something out somewhere.

[TimmyBGood]

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@PVD1878 wrote:

What's going on?

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Difficult to know, particularly as that's an ONT model which Openreach don't appear to acknowledge, and 'Alarm' is distinctly ambiguous.  I can only infer that this replaces the LOS ('loss of signal') LED on other models.

[PVD1878]

'Alarm' = 'LOS' would be my guess too.

Gremlins at work, methinks.

[Stevie64]

My Openreach box has a constant red light now showing on the alarm part, this has always been green previously.

[Chrisee]

@Stevie64 the model of ONT you have isn't one thst we see very frequently but I would report the alarm light by calling Sky even if your connection is working. You can call for free by dialing 150 on a Sky Talk or Sky mobile line