Todays News from BT

[#1]

@David_Haigh

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@David_Haigh wrote:

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So an extension box on the side of the CAB could be G.force ...

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Just thought you might need a reminder ...

[#2]

@Browni Mine has non of the aforementioned clutter on the front, so the extension is just more twisted pair.

[#3]

"g.force" may the force be with you

[#4]

@krusty the Clown,

More like g.farce the way it could be rolled out!

[#5]

@Browni you have now.
If you're already getting half of the fibre speeds when g fast enabled will you get half the speeds from the max speed?

[#6]

You need to be getting close to full FTTC speed i.e. 80/20 to get any benefit from G.Fast. So the cabinet based G.Fast roll out is only going to benefit houses within say 200-300 metres of the cab. It seems to be a quick fix so BT can offer speeds comparable to Virgin Media but only for a limited number of homes.

[#7]

Thanks for the picture @Manny7860, if you're only getting half of the available fibre speeds that would indicate you are a pretty far away from the cabinet and unlikely to benefit from G.fast.

It's still very early days for G.fast and as such there is very little data available.

[#8]

If the FTTC sync rate @ 79999k and must be within between 25m and 175m then it will benefit from it, BUT, if it was more than 175m away then you are out of luck with g.fast.

My GEA Test say my line estimate length in metres are 248m away from the FTTC, so, it a NO NO for my g.fast as it will slower than FTTC.

This is why g.fast is very poor rolled out in my view by Openreach as around 55-75% will not benefit from it because of the FTTC cab are further distance away.

One thing is why can't Openreach leave uncapped speed on all FTTC removed 80Meg capped so the line can go faster as possible from the FTTC cabinet to the property if g.fast is much lower than FTTC estimate range.

[#9]

Fairly certain my line length is > 250m and I sync at the full 80, with ~100mbps attainable. Realistic benefit from the current G.Fast implementation is probably ~300m.

[#10]

Yes that for speed estimated range for FTTC. But slightly less on g.fast because g.fast work best on very short distance from the FTTC cabinet with a stone throw in.

I think under g.fast with 248m away the speed estimated for g.fast are probably below 55Mb or less.

[#11]

My FTTC stats example with 248m away depend on SNR & attainable rate:

SNR: 18.0dB - 113000K

SNR: 15.0dB - 103000K

SNR: 12.0dB - 93000K

SNR: 9.0dB - 83000K

SNR: 6.0dB - 73000K

SNR: 3.0dB - 63000K

That's for non-target 3dB SNR by Openreach on FTTC

[#12]

Worth a read - https://www.ispreview.co.uk/index.php/2017/08/openreach-shows-g-fast-broadband-speed-improvements-si...
Edit: I see you've already read it. FWIW, it mirrors what I've seen with the test lines we've provisioned.

[#13]

Thanks for this @bobpullen So it look like I probably getting around 200/30 with approx 250m for g.fast. Look like the product from BTwholesale 152Mb / 29Mb for g.fast are likely to be capped at 152/29. Other option for 314/49 will be no chance for me.

100m    500 Mbps        50 Mbps         11%
150m 	300 Mbps 	45 Mbps 	20%
200m 	250 Mbps 	40 Mbps 	31%
300m 	150 Mbps 	20 Mbps 	52%
370m 	100 Mbps 	20 Mbps 	64%

[#14]

I'm about 800 metres half a mile away, it will make no effect on me

[#15]

I was surprise that Openreach wouldn't do a new profile 30a with vectoring for the FTTC especially those who live further distance away and maybe slightly better than g.fast that need to be much closer to the street fibre cabinet.

Profile for FTTC below:

Profile name	Bandwidth used (MHz)	                             Maximum speed (Mbps)
8c	                8.5	                                                50
17a	                17.664	                                               100
30a	                30.0	                                               200