The last suggestion from @Les-Gibson was to power cycle the ONT & then monitor the LEDs. You haven't said what the result of that was.
It's difficult to monitor the ONT constantly so if you have one, maybe try recording it with a camera of some kind. IP camera, digital camera with video or old mobile phone. You can then review the LED activity at the exact time you experience the drops.
Sorry, after that I was exasperated and exhausted, and I kind of gave up and switched back to the BT Hub.
Yes, both engineers had done this, but we have also power cycled the ONT several times ourselves. Thus far, it’s been as Les said - solid light on PON and no light on LOS.
The camera is a good idea. The ones I already have are connected online and I need my phone with me for my job, but I’ll see what I can get hold of and try this. Thank you (and thank you Les).
No flickers at all on the PON light on the ONT when the broadband drops out.
An engineer came Tuesday and tested everything again. He suggested replacing the ONT, just in case. An engineer attended today and tested everything again and refused to replace the ONT as he says it is fine.
He has suggested testing for REIN, so I have an AM radio on order to arrive tomorrow to do so. Otherwise he says there is ongoing work in the area which could be the issue, but no one else in my road on BT is having this problem.
That’s good to know. He was adamant it would be REIN and wouldn’t take no for an answer.
Have tested for REIN and, as expected, nothing. Spoken to BT multiple times and there’s been some work in our area which has now finished. The dropouts on the main hub have stopped, but we are getting constant dropout upstairs.
Speedtest tells me I’m getting 500mbps into the house, but that’s dropping to around 30mbps upstairs. I have 3 disks running.
The engineer checked the location of the disks and said they’re fine. He’s checked for channel congestion and says there is none.
I’m hitting a brick wall.
Use a 3rd party router and hardwire any access points you have upstairs as WiFi never runs well if the access points (in your case the BT disks) are receiving a bad signal and that is out of BTs control.
Except the engineer who came out and looked at it said the signal was excellent on each one and the app says excellent too.
And the engineer?