The power levels and SNR are fine, and no errors in the counters either. The network logs would have been useful. The BQM graph will be useful when propogated. (I would leave it 24hrs to get a full day's picture)
Here is a set of Thinkbroadband Speedtest results from this evening... (and the latency figures were through the roof)...
I see your package is 50/3.
Your BQM graph has a lot of blue spikes during peak time, 6pm-midnight. That's usually an indication of the user downloading/uploading a lot. Do you have anything running in the background?
Normally if it was an issue of high utilisation on your cable (other people using all the bandwidth) then I'd expect to see very low Down TBB x 1 figures (left column), but they often match or exceed the speeds shown in the TBB x 6 column.
As I don't have your actual links, except the one you posted, I can't see the detail but that alone makes me question the cause.
Are your power levels changing significantly from what you posted above?
Can you post your network log as already requested? That might indicate a cause.
Does a reboot improve speeds for a time? Don't reboot until after posting the log.
As it's been a few days, we can get @Ralph_R or someone else from the VM Forum Team to check their end and see if there's an issue with Upstream SNR, or high utilisation during peak time?
There is a small change in the Power Levels and RxMER(db) on Downstream when compared to the opening post. There is a massive increase in the Pre/Post RS Error count. The network log provides no useful information from what i can see, and nothing relating to tonights incident period.
Just look at the Broadband Quality Monitor graph... Useage from the Household was absolutely minimal during that period. So I can guarantee you that is not being caused by excessive downloading or uploading because i personally monitor it.
Sorry to see you've been having connection issues, the stats and diagnostics are helpful thanks.
As you've already concluded by the looks of things, the problems are tied to very high peak time traffic on the downstream segment of your cable, this will be causing slow speeds and latency issues. Networks have this raised on ref. F003455769 with upgrades to add capacity now estimated for around August.
If you continue to bump us here periodically we'll gladly check with networks for any news or developments.