According to the speedtest.net logs it started slowing down in November. I stopped doing regular speed tests after a while and just checked my sync speed to make sure it was still in the 70's, which it always was. Of the speed tests I did do though, it was stuck in the high 50's since December with a peak of 66Mb/s downstream at the end of June, with upstream still over 18Mb/s. I kept a closer eye on it since then and all July it's been between 48 and 52 down, and 16 up. In fact the upstream is pretty much exactly 16 no matter what server I test with and what time of day, almost as if I'm being capped at that.
I have raised a ticket with Plusnet and we are awaiting feedback from OR now. After reading some other threads, I'm wondering if this is just crosstalk? I've read that speeds can drop by 20Mb/s due to crosstalk. I did suggest this to Plusnet but they think it's too much of a drop. Their own test shows that there are no faults, and Interleaving is off.
Why does the sync speed show 71.6Mb/s if I cannot go above 52Mb/s? I know there is a delay before that number changes but it's been showing in the 70's since last year. The latency on the speed tests always shows an amazing 5ms if I pick the right server to test on.
Any thoughts appreciated please.
 The BT Wholesale test today shows max achievable downstream speed as 54.19Mb/s, max up as 20Mb/s. I guess that is going to be more current than the 71.6Mb/s that Plusnet show. Still, it's changed a lot since it was installed and a couple of months after.[/edit]
Edited by Zackary (Sat 20-Jul-13 10:27:58)