Hi, I'm new hear, so apologies if I'm not explaining my issues properly.
I have had FTTC for about 12 years, PN 40/10. For most of the first 9 years I had a relatively steady 35Mbps. I then purchased a Fritzbox 7590 router and for the next 9 months my DL speed increased to 37Mbps, DSLAM was 40Mbps, syncing at 39.99Mbps, Max obtainable 44Mbps and SNR 7dB.
Then over the next few weeks DSLAM reduced in steps down to 28.4Mbps. Plusnet requested an Openreach engineer who checked the line but could not find a fault. DSLAM was reset back to 40 Mbps, but slowly dropped down again over the next 2 months. This process has been repeated every few months for the last 2 years ! BT have lift & shifted me to different ports, but the same thing happens and some ports have had other issues. I am currently on what appears to be a good port according to my stats, but it is still dropping every few weeks
I signed up for a whitebox with SamKnows a while ago and that tells me my packet loss currently is 0.058% although I think it used to be even lower. My Fritzbox stats usually show very few CRC errors or error seconds, but once every couple of weeks they increase significantly for a few hours before returning to a low level, but this I believe causes DLM to reduce my DSLAM shortly after and before DLM decides to increase DSLAM it happens again, hence the slow reduction in speed.
If I could get DLM disabled, then my line would function perfectly for 99% of the time. When the errors do increase, I can't at the time even notice the issue, but DLM means my speed just gets slower and slower until I am forced to get Plusnet to reset it.
Any help or suggestions welcome