ADSL2+ - crazy noise margin values
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ADSL2+ - crazy noise margin values
23-04-2012 10:46 AM
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What happens is after a few days of connecting nicely with the noise margin at around 6db, at about 7am, the BT exchange and my modem decide that they can go a bit faster. The noise margin drops to 3db and the connection speed goes up but now, the modem cannot log in to Plusnet so the interent connection drops even though the modem still has DSL sync with the exchange.
Then the exchange and modem decide to go even faster. The noise margin drops to 1db and the connection speed goes higher. The noise margin fluctuates a lot between -2db and 1db. The whole thing has to fixed with a modem reboot.
Plusnet have made changes to keep the target noise margin 6db (and even 9db) but they don't seem to be permanent.
Problem happens with different modems and also in the BT test socket. Does anyone else have similar problems?
Re: ADSL2+ - crazy noise margin values
23-04-2012 5:33 PM
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I've set the target to 6dB. It can take 24 hours to take effect though.
Jojo
Re: ADSL2+ - crazy noise margin values
23-04-2012 8:03 PM
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Re: ADSL2+ - crazy noise margin values
24-04-2012 7:01 PM
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Had to reboot.
Now back to 3db.
When will the 6db target kick in?
Re: ADSL2+ - crazy noise margin values
24-04-2012 7:14 PM
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Re: ADSL2+ - crazy noise margin values
24-04-2012 9:26 PM
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Checking the router logs, it was 6db early this morning but decided 3db was better for the afternoon.
Currently sat at 1db
Re: ADSL2+ - crazy noise margin values
25-04-2012 11:40 AM
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Looks like it's at 4dB at the moment, hoping that things are improving for you?
Re: ADSL2+ - crazy noise margin values
25-04-2012 3:58 PM
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Fingers crossed.
While I am impressed that the circuit can work at higher speeds with a noise margin of 3db and lower, it just isn't reliable enough so I am more than happy to stick at 6db and sacrifice a bit more speed for a stable connection.
[Edit]
Support have just posted ths on my ticket
"Unable to increase SNR as still in stabilisation period until tomorrow."
Perhaps why JoJo and Adam's changes failed to work?
Re: ADSL2+ - crazy noise margin values
26-04-2012 10:35 AM
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Re: ADSL2+ - crazy noise margin values
27-04-2012 7:06 PM
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Re: ADSL2+ - crazy noise margin values
30-04-2012 10:22 AM
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Noted the comments on your ticket, was there a blip over the weekend? Looks like things are better now, your downstream SNR is up to 7.2dB and looks healthy, and the latest connection is over 17 hours long - hope it stays that way for you.
Re: ADSL2+ - crazy noise margin values
30-04-2012 4:49 PM
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Re: ADSL2+ - crazy noise margin values
12-05-2012 7:57 PM
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Re: ADSL2+ - crazy noise margin values
19-05-2012 9:42 AM
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Re: ADSL2+ - crazy noise margin values
19-05-2012 11:03 AM
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- Re: ADSL2+ - crazy noise margin values