Do you mean a speed vs reach graph using the new power/bitloading setup?
I've only seen two. One (which I may have subsequently seen on kitz) seems like it was by someone with a vested interest lying elsewhere. Another (from Sckipio) showing amazing improvements ... but they have the opposite vested interest.
Otherwise, I've seen little that gives me a decent confidence about what can be achieved with the amendment 2 chipsets.
It has been proving harder to get data out of conferences recently, so there is little *decent* information around right now. I don't expect that to change until the newer chipsets become more prevalent.
If, of course, it turns out that fibre is needed.
One of the aims of the 3rd research project in the sequence that have given us G.Fast (ie the 4GBB/Gold project) is to develop new backhaul solutions ... which includes the idea of backhauling on copper, not fibre.
Ironically, that may give BT a really good reason to not go deeper for another couple of years, in case it turns out to be feasible.
I think you're right on that. If I have the numbers right from BT's trials early last year, the downstream speeds (not aggregate) are effectively:
- 300Mb to 150m
- 200Mb to 200m
- 100Mb to 250m
If you've got a link for the newer stuff, I'll have a look.