Bizarrely, the only BT Master Socket I can find anywhere doesn't work. There is no dial tone.
13MBit isn't bad per se, but it doesn't cut it for me as I rely on the connection for work.
Speeds started off as expected of Be, but now they are, quite frankly, pathetic.
Any source I d/l from sees speeds jumping all over the place.
With those attenuation figures as pointed out you should of seen the full advertised sync rate of 24mbits and the 1.4mbits upstream, that line should be capable of an upload speed of 2.5mbit or somewhere very near that without seeing much if any of a drop in downstream sync speeds
And its also unusual for the target snr to differ by 3db as they i believe should be symmetrical as it's how the BE/O2 dslams are configured,
Have you contacted Vivaciti about this , if so what have they said about it, just one other thing and reason for the low sync rates which profile is the line set to, INP1 or 2,or is it fastpath ,
Fluctuating downstream throughput if this is a correct description,
could be an indication of a few different things, from interference that is causing a high error rate,or packet loss which will in turn basically kill the throughput,
Or it could be down to the BE Backhaul from the exchange being insufficient, this would also lead to a decline in sync speeds, or the issue could be down to something within vivacity's control such as peering capacity and management of that , or their networks,i would start with asking Vivaciti why you have a naff connection