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Standard User Lemzip
(fountain of knowledge) Wed 24-Nov-10 03:50:34
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REIN REIN go away....


[link to this post]
 
Hi

For the past few weeks i have had alot of issues with my adsl2+ service. I used to be able to get a nice 16.5mg connection and something has started playing up with my line.

I have narrowed it down to two things.

1. Could be REIN.

2. Crosstalk (on TT llu service so guess they crammed in)

This is usual for me, please see the screenshot http://img.photobucket.com/albums/v228/Lemzip/anothe...

http://img.photobucket.com/albums/v228/Lemzip/again.jpg
http://img.photobucket.com/albums/v228/Lemzip/untitl...
http://img.photobucket.com/albums/v228/Lemzip/router...

On the last screenshot the complete drop was my resyncing.

This happens at random times. Usually goes back to normal from 11pm to 3am then drop back down 3db from 7am to 9am then sits like that for the whole day.

Could this be rein or crosstalk? I have no internal wiring and have been using the test socket (aswell as a adslnation faceplace filter. I have had my entire house power off connected with a usb modem to my laptop and get the same results so not my house causing the issue.

I have tried the tuning in a AM radio to 612Khz and walking around but iat night i only get a french lady and the only real noise maker is the plasma telly however its far away and this is on even when line stats return to normal.

Im running a DG834 GT with DG Team firmware with my snr dropped to 50%. I have tried with a 12db snr with my isp and this same issue happens. I have tried around 6-7 filters (3 different brands) and 3 routers (all netgear 2 GT's and one v5)

Any ideas, struggling to find the problem.

thanks

ADDED: my old stats from DEC 08 (only ones i can find!)

ADSL Link Downstream Upstream
Connection Speed 17264 kbps 1017 kbps
Line Attenuation 31.0 db 13.8 db
Noise Margin 4.8 db 9.4 db


Current stats

ADSL Link Downstream Upstream
Connection Speed 14765 kbps 1020 kbps
Line Attenuation 31.5 db 15.7 db
Noise Margin 5.7 db 10.4 db

Connection Speed 17802 kbps/1017 kbps
[TalkTalk LLU[/B]

Edited by Lemzip (Wed 24-Nov-10 04:01:06)

Standard User Lemzip
(fountain of knowledge) Wed 24-Nov-10 08:14:14
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Re: REIN REIN go away....


[re: Lemzip] [link to this post]
 
this morning...

http://img.photobucket.com/albums/v228/Lemzip/wedmor...

very odd as it usually drops for the entire day and does not recover until 11pm-3am

edit: spoke to soon

http://img.photobucket.com/albums/v228/Lemzip/wedmor...

Edited by Lemzip (Wed 24-Nov-10 09:30:17)

Standard User MHC
(legend) Wed 24-Nov-10 11:09:38
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Re: REIN REIN go away....


[re: Lemzip] [link to this post]
 
Neighbours, Factory or Office block down the road, traffic lights, temporary roadworks and generator, Christmas lights. There are plenty of things which could cause the additional noise. Your problem will be tracking them down.





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


M H C


taurus excreta cerebrum vincit


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Standard User Lemzip
(fountain of knowledge) Wed 24-Nov-10 11:16:54
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Re: REIN REIN go away....


[re: MHC] [link to this post]
 
Any distance i should be looking at? Im residential with no office blocks etc near me and detatched (by about 4-5 foot) from my neighbour. The other side is just farm land so not alot to go on.

Writing a letter to my 6-7 closest properties to see if they can match up the time to the noise but not holding my breath on a response.

Is this a rein problem or crosstalk?
Standard User MHC
(legend) Wed 24-Nov-10 11:28:56
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Re: REIN REIN go away....


[re: Lemzip] [link to this post]
 
My guess would be noise - and a constant source rather than a specific impulse/burst that can cause loss of sync.

Given the times - it could, for example, be a very noisy central heating pump or pump in a garden water feature.

Where is the cabinet? I have seen roadworks adjacent to a BT cabinet and a large generator sitting there pumping out horrendous RFI which was almost killing all connections through the cabinet.


Can you see the bitloading graphs for your router at the different times?





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


M H C


taurus excreta cerebrum vincit
Standard User Lemzip
(fountain of knowledge) Wed 24-Nov-10 11:45:26
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Re: REIN REIN go away....


[re: MHC] [link to this post]
 
here is my green cab, around 150meters away, no works happening however there is the sub station for this area as you can see here

http://maps.google.com/maps?f=q&source=s_q&hl=en&geo...

My bit loading is here dont know if this is what you need

http://img.photobucket.com/albums/v228/Lemzip/bitloa...
Standard User MHC
(legend) Wed 24-Nov-10 12:07:12
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Re: REIN REIN go away....


[re: Lemzip] [link to this post]
 
Grab some bit loading graphs when all is clean and when you have the drop. Compare the two and you may see some additional notches. Work out the frequency they are at and then use your MW radio at that frequency.

Just in front of the substation is a duct cover which could be BTs. That would suggest cables running past the substation and very close to power cables exiting.

Try the radio outside the substation at good and bad times and see if the noise is any different.





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


M H C


taurus excreta cerebrum vincit
Standard User Lemzip
(fountain of knowledge) Wed 24-Nov-10 12:27:30
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Re: REIN REIN go away....


[re: MHC] [link to this post]
 
okay thanks.

Any idea why the sub station would cause this? Different requests for power for the area?
Standard User BeachBoy
(experienced) Wed 24-Nov-10 13:04:08
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Re: REIN REIN go away....


[re: Lemzip] [link to this post]
 
I've been chasing something similar since 2006! Never found the suspect, robs me of around 9dB
Totally random, the 'noise' is on virtually all the time, just once in a while it will go for a few hours or even a week.

noise-off

noise-on

DMT-View

Vivaciti_LLU [C&W]
Standard User Lemzip
(fountain of knowledge) Wed 24-Nov-10 13:27:29
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Re: REIN REIN go away....


[re: BeachBoy] [link to this post]
 
dam, im only loosing 3-4db and that is doing my head in.

Just got the mrs to drop off 6 letters to the closest neighbours....

im sofa bound, had my gallbladder out on Monday morning!
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