There was pressure for the figures to be even lower from some quarters, but settled on ANFP research worst case i.e. 70 to 80% take-up and no vectoring. Some fought for 350m to be absolute limit of superfast access and still do.

Same distance ranges are used for our coverage statistics, so that if anything we are under estimating superfast coverage.

Once vectoring goes national and a good sample of the changes it represents appear we will update, and info from some sub LLU doing vectoring is very promising.

It is creeping up even more! Now at 80984

In reply to a post by MHC:

This morning I am seeing 80768 kbps as the max attainable rate. The line is probably around 440-450m and I know the exact route within a metre or two of where it is underground. It is probably at the very top end of what can be achieved. Next time I have a BT Tech here I will get him to check the length using his TDR.

My last line had attenuation of 16.4dB, and acted very similarly to yours - though this was all before G.INP.

Back in 2012, the attainable speed only dropped from around 84/26 to 82/25, then stuck there for a long time. When we left, it was doing around 79/23.

That line was probably around 380-390m long.

In reply to a post by MrSaffron:

Some fought for 350m to be absolute limit of superfast access and still do.

Seriously? The limit of 24-30Mbps?

I know some pro-FTTP campaigners feel the need to belittle the actual capability of FTTC, but this is kinda ridiculous. Perhaps the "some" should be named and shamed!

In the meantime, Ofcom publish this as the speed distributions for UK FTTC:
http://postimg.org/image/bly6o16cl/

That suggests that only 10% of lines get sub-30Mbps speeds.

Meanwhile, the Sagentia report reckons D-side length distributions are:
http://postimg.org/image/bp372fcnn/

That suggests the longest 10% lines are >1km.

info from some sub LLU doing vectoring is very promising.

Oooohh .... do tell ... !

100 Mbps plus may be possible i.e. what we saw from the old Digital Region project previously

VDSL2 is far from perfect, but yes it delivering what makes the majority happy for now. Even where gigabit is available when people are given a choice of packages the 20 to 50 Mbps packages often win out, since many are happy to trade a bit of time for savings.

With the analysis we have done on line lengths from cabinets, the Sagenta stuff looks right.

Of course if one of those not getting decent speeds from VDSL2 one can understand the annoyance, i.e. those who've upgraded and still getting sub HD streaming speeds.

In reply to a post by WWWombat:

In reply to a post by MHC:

This morning I am seeing 80768 kbps as the max attainable rate. The line is probably around 440-450m and I know the exact route within a metre or two of where it is underground. It is probably at the very top end of what can be achieved. Next time I have a BT Tech here I will get him to check the length using his TDR.

My last line had attenuation of 16.4dB, and acted very similarly to yours - though this was all before G.INP.

Back in 2012, the attainable speed only dropped from around 84/26 to 82/25, then stuck there for a long time. When we left, it was doing around 79/23.

That line was probably around 380-390m long.

Peaked at 83Mbps earlier this afternoon. Attenuation is 16.7 ...

Is someone adding vectoring to your line, tone-by-tone?

I did wonder if Vectoring had been applied and it was going through a learning phase although I doubt it.

No, I doubt it too.

When I get improvements of that order, it usually happens suddenly - and I put it down to someone turning a modem off somewhere. The improvement usually disappears, perhaps a day later, perhaps a week or two.

I did a reboot as I could see quite a few tones that were locked out and my sync had slowly drifted down. A little surprised at the new level with max attainable over 80000 kbps and then the slow day by day increments.