Finally to finish off.
I already mentioned
yesterday that I was aware that Williams upstream was showing some slight instability. I said at the time that I suspected there was an amount of what could be normalish SNRm variance of about 1.5dB,
plus something similar to REIN that happened during the hours of 1pm and 4:30 pm.
Having looked at Williams stats today, I am still of the opinion that Williams line looks like it has a daily swing of ~ 1.5dB.
It does now indeed look like yesterdays 1 - 4:30 incident could have been REIN. Yesterday was a beautiful afternoon and it could have been something like a neighbour with power tools in the garden (A couple of years ago I saw similar when my neighbour was jet washing his drive).
Whilst this still leaves a daily swing, but to be perfectly honest this is going to be exceedingly difficult for Openreach to track down and it will just be written off as performing within normal parameters. There could be a very early HR fault, but again until it gets MUCH worse, Openreach wont really do anything until it actually impacts voice. I know from personal experience if they cant find a 10dB HR spiking until it impacted voice, I doubt they will do anything for 1.5dB when the line is not experiencing excessive errors.
I feel that to give William the best chance of getting the DLM reset, then for now we should concentrate on the downstream issue.
If the upstream variance gets a lot worse or if it starts affecting voice, then the situation should be reviewed at that time.