SNR Margin Adjustment
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- Re: SNR Margin Adjustment
SNR Margin Adjustment
07-06-2009 11:51 AM
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So my question is: will the exchange equipment ever change the SNR margin (which it never did for me) or does this have to be done by the user?
Re: SNR Margin Adjustment
07-06-2009 3:06 PM
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Making changes behind the DLM's back seems to confuse it and can lead to unwanted behaviour - the SNR margin heading upwards, but it will be interesting to see if that is what happens following your endeavours.
Re: SNR Margin Adjustment
11-06-2009 4:30 PM
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Re: SNR Margin Adjustment
11-06-2009 4:34 PM
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That sounds promising.
Re: SNR Margin Adjustment
26-06-2009 9:28 AM
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What I'm not sure of is how IE8 lost contact with router because I would have preffered to have left things alone to avoid upsetting what was seeming a fairly stable setting.
Re: SNR Margin Adjustment
28-06-2009 7:31 PM
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My noise margin was stable for months at 6dB.
For some reason (No resyncs etc) BT put this up to 9dB
The recent thunderstorms yesterday caused a further uplift to 12dB - even though it didn't quite loose sync during them.
Please could I ask Plusnet to request a target noise margin of 6dB again from BT?
I'm asking here, because no response (at all) occured when I tried raising tickets on the 9dB issue (on both occasions).
"In The Beginning Was The Word, And The Word Was Aardvark."
Re: SNR Margin Adjustment
29-06-2009 12:19 PM
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After about 3 days (after the thunderstorms), I would expect a drop.
Re: SNR Margin Adjustment
29-06-2009 12:28 PM
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The only thing that has dropped is the sync speed.
PN have succesfully requested BT to reduce target noise margins in the past.
"In The Beginning Was The Word, And The Word Was Aardvark."
Re: SNR Margin Adjustment
29-06-2009 12:47 PM
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Re: SNR Margin Adjustment
29-06-2009 3:26 PM
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Lasted about 48hr before DLM decided it knew better. 9db was great; stable at 23500. Now down to 15000 which I suppose is better than the 8000 it was before.
Re: SNR Margin Adjustment
29-06-2009 4:19 PM
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Best ever was about 7Mbps - all on 21CN!!!!!
I'm only 2Km from the exchange.
It looks like a job for DMT - pathetic isn't it?
"In The Beginning Was The Word, And The Word Was Aardvark."
Re: SNR Margin Adjustment
13-07-2009 8:38 AM
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Quote from: jamesd You have before on ADSL2... I asked for 9db on my line as it either tries 6db or 12db (or more). Never anything between.
Lasted about 48hr before DLM decided it knew better. 9db was great; stable at 23500. Now down to 15000 which I suppose is better than the 8000 it was before.
Our was lowered by you too, after a lot of testing and investigation of the connection. Take a look at ticket ID: 28464949
It was first changed down to 9db by BT on 20th April and then went back up to 15db, eventually being reinstated at 9db early in May. Following a recent power cut and subsequent resynch, it's now down to around 6db, which is where it was with ADSL Max!
Full Fibre since September 2023
Mac OS14 and Firefox user with latest versions of both
Re: SNR Margin Adjustment
14-07-2009 7:14 PM
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I my ticket - PN are going to request a lower SNR or 6db as the DLM thinks 15db is best. Strange on the ADSLmax the DLM thinks 6db is best!
Phil
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