Upstream SNR
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- Re: Upstream SNR
Upstream SNR
09-05-2010 8:16 PM
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Prior to plusnet I was with SKY and got 3800 connection with snr of 5db and never really had any issues.
The problem I have is that I have a high target SNR on the DLM system , I am tweaking my SNR in order to get a 3MB IP Profile but cannot use the router I was supplied with as my snyc speed is too low and I cannot adjust the SNR on it.
Now to get this speed I need to sync above 3424 sync, for me to do this I only need to take 3db off the SNR, so can connect at 9db and get the 3MB IP profile I want.
I have been using router stats to keep and eye on things, I have had a few disconnections today.
From what I can see the downstream SNR is fairly constant, but the upstream is a bit manic to say the least.
I have my upstream uncapped but am wondering now whether this is causing me some issues.
Would appreciate any help or adivce as I believe now that it may be my upstream SNR which is causing the connection to drop.
I have also done some research this weekend on my master socket which to me looked a bit weird and I thought it was non BT. I have found out that it is a BT master socket with a BT faceplate on it which was not something I had seen before. I do not need a fliter as the faceplate has two ports on it, one for the phone and one for the router. The router is less than a metre from the socket, as is this phone, which is the only phone I have. There are no other sockets in the house.
Some screen shots below.
Router stats
Downstream
Upstream
Router stats
Re: Upstream SNR
09-05-2010 9:04 PM
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Downstream
Upstream
Re: Upstream SNR
10-05-2010 11:57 AM
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Re: Upstream SNR
10-05-2010 3:59 PM
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Activating interleaving would, but that would take 800k off your speed.
Re: Upstream SNR
10-05-2010 4:06 PM
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Would it be possible to raise a fault with BT to see why I am getting these spikes on the SNR, which in turn is making my connection drop and then taking my target SNR go up to the 12db target it is at present?
Is my logic correct, or am I missing something?
Thanks for all your help.
Re: Upstream SNR
10-05-2010 5:01 PM
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It depends how often the line is dropping - if it's more than daily we stand a fair chance, but I very much doubt we'd find out what the actual cause was. You could run through the tests on the faults wizard (http://faults.plus.net) and see what difference that makes?
Re: Upstream SNR
10-05-2010 5:43 PM
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I have previously ran all the tests and no fault has been found.
My connection drops a few times each day.
I have a feeling that bt may tell me that is because I am tweaking my snr, but the point I would make is that it is these snr spikes that are on my graph which has set the target snr so high in the first place. The line goes along very happy apart from when it spikes, I changed my target snr so that I was only taking off 3db, but the line still drops.
Maybe bt will tell me that it is because it is a long line but I would like to ask them the question. Hope you can help
Cheers
Michael.
Re: Upstream SNR
11-05-2010 5:52 PM
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Any update?
Ta
Re: Upstream SNR
12-05-2010 9:46 AM
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I'm afraid there's no fault tickets open for me to update for you - if you raise one, I'll happily test the line and let you know what I get.
Re: Upstream SNR
12-05-2010 10:36 AM
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Re: Upstream SNR
12-05-2010 4:57 PM
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Sorry for the delay in getting back to you. I've raised this for you now, and will keep you posted regarding updates.
Re: Upstream SNR
13-05-2010 9:28 AM
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I had to reboot my rotuer a couple of times last night, not sure if this is related to the tests being done.
Appreciate all your help.
Michael.
Re: Upstream SNR
13-05-2010 11:36 AM
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Re: Upstream SNR
13-05-2010 12:15 PM
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Re: Upstream SNR
14-05-2010 7:25 AM
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Logged on today and it spiked and dropped almost straight away, see attached,
There is something not right in quite a big way I would say.
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