Thanks Bald_Eagle1. I did think that my QLN graph looked a bit more noisy than a lot of other lines but is this noise due to something outside my control like crosstalk or is there something in my house spewing out rfi. That's what I've been asking myself and why I went out and bought a shielded modem cable.
Unfortunately I don't have any stats or graphs from the first couple of months when my line was syncing at 80/20 so I'm not sure if the line has always been this noisy or it was just a short term event at the time of the last resync.
As far as I could tell, the Hlog looked OK with nothing particularly nasty on the line.
My own QLN graphs have deteriorated over time as crosstalk has gradually increased.
In your case, it
could have been a short term event or a single crosstalk disturber could have been the cause which result in a more permanent speed reduction.
The reduced SNRM does suggest this is a more permanent issue (possibly a HR fault, but my guess is crosstalk).
Without access to previous stats/graphs, it has to be more of guess, I'm afraid.
My connection has gradually lost around 30% of its originally achievable DS sync speed.
Other users have sometimes seen such a permanent drop in one hit.
