@NiceOneJoey Error counts are since the last hub restart, and the ones that count are uncorrected - that's the post-RS. Regarding the upstream modulation, it's quite normal to see it fluctuate. It SHOULDN'T, but what's happening is that the upstream connection is subject to a noise fault, the hub lowers its modulation rate (the data transfer rate, as an approximation) to try and maintain a stable connection, when it gets too bad then channels are dropped, and that can be either downstream or upstream, leading to dropped connections, poor speeds and packet loss. When the hub is restarted, or if it gets a sufficiently faulty connection, then it will renegotiate all channels from scratch. From a user point of view if the hub sees a need to do this it appears like a spontaneous reboot of the hub, but isn't, it's just dropping all channels and trying to secure a working connection from first principles. This is why a restart often temporarily "fixes" this sort of problem, but it then recurs. Sometimes the noise is caused by an intermittent connection or equipment fault, which can make finding it a lot trickier for the technicians.
As there's some underlying fault causing these outcomes, it is that underlying fault that needs fixing, and it can be either unique to your connection, requiring a technician, or an area fault (where a technician has to fix it but won't need to visit you). It COULD be the hub, but on a balance of probability it is vastly more likely to be a noise issue. So if you get sent a new hub, then don't be too surprised if that doesn't resolve the issue.
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