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Standard User t99del
(newbie) Thu 31-Dec-15 10:27:42
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BT - disconnected then reconnected giving slow connection


[link to this post]
 
earlier this month my phone line and broadband stoped working.
an engineer visited to resolve and eventually found my line had been disconnected in the street cabinet !
he re connected my line to a new 'pair' and all started working again.
HOWEVER
previously my broadband ran at around 4Mb (yes thats right 4Mb)
it is now running around 2Mb
I was advised it will take 10- 14 days to retrain the line
20 days have passed still only 2MB
BT have now said not a problem as with in agreed levels

What can I do to get my 4Mb line back
Administrator MrSaffron
(staff) Thu 31-Dec-15 10:45:42
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Re: BT - disconnected then reconnected giving slow connectio


[re: t99del] [link to this post]
 
The key first step is what are the connection stats from the modem i.e. sync speeds, attenuation and noise margins (SNR)

A simple restart of the modem is worth a shot, since modems do not automatically speed up, then need nudging by a human.

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User t99del
(newbie) Thu 31-Dec-15 11:32:30
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Re: BT - disconnected then reconnected giving slow connectio


[re: MrSaffron] [link to this post]
 
Downstream
Connection Speed 3232 kbps
Line Attenuation 41.0 db
Noise Margin 15.8 db


Upstream
Connection Speed 448 kbps
Line Attenuation 27.0 db
Noise Margin 21.0 db


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Standard User ian72
(eat-sleep-adslguide) Thu 31-Dec-15 11:55:38
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Re: BT - disconnected then reconnected giving slow connectio


[re: t99del] [link to this post]
 
Was that straight after a restart? If so then you have a fairly high noise margin, that may be because it needs to be for stability or it could be that it could be lowered and therefore give you better speeds. Try asking the ISP to set your target noise margin to 6dB - but be aware that if the line is not as good quality it could become unstable and the target margin might increase again automatically to stabilise the line.
Standard User RobertoS
(elder) Thu 31-Dec-15 11:59:23
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Re: BT - disconnected then reconnected giving slow connectio


[re: t99del] [link to this post]
 
As Ian sort of implies, have you done a reboot of the router since the fault was fixed? It's worth doing, then post the stats again, as any change will not be reflected in throughput for a while - though we will be able to see it will come in the stats.

The indispensable man or woman passes from the scene, and what happens next is more or less the same thing as was happening before.
My broadband basic info/help site - www.robertos.me.uk. Domains, site and mail hosting - Tsohost.
Connection - AAISP Home::1 80/20. Sync 59997/15142kbps @ 600m. - BQM
Standard User t99del
(newbie) Wed 13-Jan-16 23:07:55
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Re: BT - disconnected then reconnected giving slow connectio


[re: RobertoS] [link to this post]
 
So still no improvement

This is after latest reboot

ADSL Link Downstream Upstream
Connection Speed 3104 kbps 448 kbps
Line Attenuation 44.0 db 25.5 db
Noise Margin 15.2 db 20.0 db

on 8th Jan BT engineer said he could try something his end and I should restart my router in 2 hours
this I did and speed was 4.7Mb
on 9th Jan lost DSL 15 minutes later reconnected now speed back to 2.5Mb
has been between 1.7Mb and 2.6Mb ever since

I have changed filter, I have tried new router all to no avail
Administrator MrSaffron
(staff) Wed 13-Jan-16 23:16:18
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Re: BT - disconnected then reconnected giving slow connectio


[re: t99del] [link to this post]
 
Until a target noise margin reset is done again for the dlm on the line the 15dB target margin is probably going to remain, unless the line is very stable

The fact you got a good speed for a short while suggests the reset did happen, but DLM quickly saw things as unstable

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
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