Bridge tap
"@greygit I would also be asking why your SNR figures (both directions) are so low - this certainly won't be helping"
Oddly I am getting better line/actual speeds with those (marginal?) SNR's compared with the lower line/actual speeds with a higher SNR (that's the SNR/line speeds when having the mk4 faceplate in place). Unless the Hub2 isn't reporting correct SNR. The last OR eng appeared to suggest he had better SNR than the Hub2 was reporting, and that the figures varied.
