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Standard User RobertoS
(elder) Tue 30-Jun-20 09:39:25
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Re: BT/Openreach migration gateway


[re: adslmax] [link to this post]
 
Just to clarify, "next step is to see if DLM tries ....".

OP should not try anything except waiting smile.

__________________________________________________________
Sovereignty Means Sovereignty

My broadband basic info/help site - www.robertos.me.uk. Domains, sites and mail hosting - Tsohost & Ionos.
Connection - Three B311 4G, tbb tests normally 35-45Mpbs down, 65Mbps off-peak, 9-24 up. 1+ 8 Pro max 80Mbps down, 24Mbps up.
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Standard User sparky_paul
(experienced) Tue 30-Jun-20 12:33:52
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Re: BT/Openreach migration gateway


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
Just to clarify, "next step is to see if DLM tries ....".

OP should not try anything except waiting smile.

Indeed, leaving well alone. I'm just praying for no more power cuts!

FWIW, neighbours on either side are at 80/20, according to the observed figures on the BTw checker. I know they have both had new NTEs fitted in the last 2 years, and one of them a new drop wire, in an attempt to cure line noise. I'm still on an old LJU5, but the quiet line test is good, after a repair by OR back in April for complete loss of dial tone - one leg down I think, as ADSL still functioned with crippled speeds.

I've also read a few anecdotes of a significant (10% or so) drop in sync when hubs were replaced by a SH2, which is what BT have issued me with. I think both the neighbours are still using HH6 hubs.

I might consider replacing the LJU at some point in the future, when everything has settled, see if it makes any difference.

>>> BTFibre 2 FTTC

Edited by sparky_paul (Tue 30-Jun-20 12:49:57)

Standard User j0hn83
(fountain of knowledge) Tue 30-Jun-20 15:35:35
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Re: BT/Openreach migration gateway


[re: adslmax] [link to this post]
 
In reply to a post by adslmax:
Yes as it seem G.INP has added 10Mbps on your line now as this the max sync rate now. Next steps DLM is to tries lower SNR target 3dB as it might reduced 1dB as a time all the way down to 3dB from 6dB. As I think max sync rate could go up around 73-74 Meg for sync rate @ 3dB.


You think 3dB SNRM target drop will give them a 3-4Mb increase in sync?
You making that up in your head?
They might even get that from a drop to 5dB alone.

A drop to 3dB will see them hit 80Mb without a doubt.


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Standard User sparky_paul
(experienced) Tue 30-Jun-20 19:05:04
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Re: BT/Openreach migration gateway


[re: j0hn83] [link to this post]
 
In reply to a post by j0hn83:
A drop to 3dB will see them hit 80Mb without a doubt.

I hope you're right! smile

>>> BTFibre 2 FTTC
Standard User adslmax
(knowledge is power) Tue 30-Jun-20 19:20:17
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Re: BT/Openreach migration gateway


[re: sparky_paul] [link to this post]
 
In reply to a post by sparky_paul:
In reply to a post by j0hn83:
A drop to 3dB will see them hit 80Mb without a doubt.

I hope you're right! smile


I be very surprise a large jump from 70Mbps to 80Mbps for an extra 3dB lower snr if it has happen (I think stick to 73-74Mbps)

PN FTTC 80/20 since 2014
Standard User j0hn83
(fountain of knowledge) Tue 30-Jun-20 20:16:48
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Re: BT/Openreach migration gateway


[re: adslmax] [link to this post]
 
Each 1dB is worth 3-4Mb on lines that make good use of the D3 band.

Any line syncing at 70Mb at 6dB SNRM is making good use of the D3 band.

He'll likely sync higher than 73Mb on the drop to 5dB.

My line goes from 35Mb at 6dB to 44Mb at 3dB and my line is too long to use all of the D3 band.

The higher the sync, the more sync increases with each 1dB of SNRM.

Don't worry Max I'll be here to say I told you so if his line drops to 3dB smile
Standard User sparky_paul
(experienced) Tue 30-Jun-20 20:38:38
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Re: BT/Openreach migration gateway


[re: j0hn83] [link to this post]
 
Good info, thanks. I guess we'll find out who's right in due course wink

With regard to the SNR reducing to 3dB, is this likely to happen over the first two weeks, or are we talking over a longer period?

>>> BTFibre 2 FTTC

Edited by sparky_paul (Tue 30-Jun-20 20:47:33)

Standard User j0hn83
(fountain of knowledge) Tue 30-Jun-20 22:16:30
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Re: BT/Openreach migration gateway


[re: sparky_paul] [link to this post]
 
In reply to a post by sparky_paul:
Good info, thanks. I guess we'll find out who's right in due course wink

With regard to the SNR reducing to 3dB, is this likely to happen over the first two weeks, or are we talking over a longer period?


Sometimes days, sometimes weeks, sometimes never.

It's entirely dependant on how stable the line is and what stability DLM profile the ISP uses.

Ideally the line is left untouched (no rebooting the modem) and DLM make the changes in a few days.

Please keep the thread updated.
Standard User sparky_paul
(experienced) Tue 30-Jun-20 22:47:20
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Re: BT/Openreach migration gateway


[re: j0hn83] [link to this post]
 
In reply to a post by j0hn83:
Please keep the thread updated.

I will, any movement will be reported here. I'm sure someone will find it interesting...

We could have a sweep on the final figure wink

>>> BTFibre 2 FTTC
Standard User RobertoS
(elder) Tue 30-Jun-20 22:52:17
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Re: BT/Openreach migration gateway


[re: sparky_paul] [link to this post]
 
As John says, except it isn't quite that bad.

The initial drop from 6dB to 5dB can take a couple of weeks. My experience following that, on more that one occasion, is the subsequent 1dB drops (if justified) can occur after successive periods of 3-5 days.

__________________________________________________________
Sovereignty Means Sovereignty

My broadband basic info/help site - www.robertos.me.uk. Domains, sites and mail hosting - Tsohost & Ionos.
Connection - Three B311 4G, tbb tests normally 35-45Mpbs down, 65Mbps off-peak, 9-24 up. 1+ 8 Pro max 80Mbps down, 24Mbps up.
=========================
To argue with a mindless bigot is foolish.
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