Though because I never saw the engineers JDSU I wouldn't be able to get an exact measurement or thickness of the cable.
Though it does really seem to match that 0.4mm measurement you quoted, on the low end at least.
EDIT: On closer looking at the links mine looks to be more like 0.5mm, because the 70mbps and more I previously saw would only be possible at 350m (more like as the crow flies distance for me) or less on 0.4mm.
Though based off the speeds my line length must have suddenly doubled for that drop to have occurred, obviously nigh on impossible.
Like I said in the first post before this drop the speeds varied between 70-85mbps, so there was reasonable variation of about 4db on SNR.
This drop was pretty sudden like a matter of a day or two at most from when I'd previously checked it, I'd been keeping an eye on it for a week or so to see the range of change and see what BT estimated.
Yeah after the suggestions previously, I was thinking more and more that crosstalk was looking like the cause, obviously being a relatively new technology to us in the UK there are unknowns, but I'm still very surprised that such a large drop would occur this quickly it doesn't bode well for everyone else if this sort of drop occurs with crosstalk.
It's looking like those within 200m-300m will be the lucky ones and everyone else will get good speeds which won't be good in 5-10 years time.
Edited by woodyblade (Sun 29-Jan-12 00:16:28)