Hoping someing can help me. I recently changed from another provider to bt, actually a few months ago now. I have been having problems with the internet dropping randomly but the lights on the modem not changing.
I have called bt several times and all they do is run a speed test or line test and dont find anything and said it was a problem on my end after sending me a new smart hub.
Following what they said I checked my whole home network over and found no problems, i thought maybe it was an issue an engineer needed to fix but recently i made a discovery about what is causing the problem, basically as soon as someone on my network uploads something (even a picture to facebook) the download speeds stop, i mean I cant even open the page to run a speed test when an upload is taking place. when a upload is not happening my download is fine. I find this strange because on fibreop or even broadband upload and download should be seperate and is controlled by a buffer in the router. I ran a in depth speed test and learned the buffer-bloat is exceptionally bad, so i contacted bt again and all they did was run another line test and ignored what i was saying.....
Hopefully someone here has experienced the same problem and can offer a solution.
I would also like to add that having experienced this problem for a couple of months i even decided to get a second line into my house and have a new provider, the problem does not happen with their router and the speeds are not as good as what i am getting with the bt smart hub on fibre. Also proving there is nothing in my home network causing the problem.