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    Line retrained itself

    This is a discussion on Line retrained itself within the Sky Broadband help forums, part of the Sky Broadband help and support category; So, I went away for two weeks starting at the end of March. I've only just realised that my router ...

    1. #1
      gareth86's Avatar
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      Line retrained itself

      So, I went away for two weeks starting at the end of March. I've only just realised that my router is synced higher. Checked on My Sky and it says:

      Line connection testing completed on 29/03/2012, resulting in the following settings:

      Download speed setting
      Your connection has been set to a download speed of up to 17.0Mbps .

      Upload speed setting
      Your connection has been set to an upload speed of up to 1.3Mbps .


      I'm not complaining but it has pushed my noise margin down to 6, and I never asked for my connection to be retrained. Strange? Or is this something they normally do now... randomly? lol.

      In other news, I've just ordered the Wireless N router on the sky website. Any comments on it?
      Gareth


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    3. #2
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      Re: Line retrained itself

      Tweaks were made to the DLM engine fairly recently (mostly just using lower target SNRs where applicable) and it's being re-run on some lines again.

    4. #3
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      Re: Line retrained itself

      Aha, that explains it then. Thanks
      Gareth

    5. #4
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      Re: Line retrained itself

      Just wondering, I read somewhere that now the target SNR is about 6db, not sure if this is right but if so, would it be possible that I could squeeze a bit more out of my connection.
      Current Noise Margin is 7.1db, 14646up, 1153 down and attenuation of 27.5. Connection is always stable.

    6. #5
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      Re: Line retrained itself

      Manually, Sky can't set it lower than 7dB - 7dB still remains the standard target d/s SNR. If DLM runs another profile optimisation period, then it may set the d/s SNR at either 3dB, 6dB or the usual 7dB. It's all down to the discretion of the DLM engine, really.

      As it stands, your speeds are pretty solid for the attenuation. No real point going through another profile optimisation if it isn't going to improve things immensely to be honest.

    7. #6
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      Re: Line retrained itself

      Quote Originally Posted by robnobleuk View Post
      Just wondering, I read somewhere that now the target SNR is about 6db, not sure if this is right but if so, would it be possible that I could squeeze a bit more out of my connection.
      Current Noise Margin is 7.1db, 14646up, 1153 down and attenuation of 27.5. Connection is always stable.
      Well with those stats I'd be really concerned. I'd expect more than 1153 down with that attenuation.

      All joking aside I'd hope for more than 14646 down with your attenuation. I get near 16000 with a 30.5 attenuation

    8. #7
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      Re: Line retrained itself

      I get 15358 on 27.5dB so not much more can be squeezed.

      I'd have to somehow get to 15900 to get the next IP Profile step up anyway...
      Current Sync 79999/19999

    9. #8
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      Re: Line retrained itself

      Ah, I see what I did there .
      Thanks anyway. I know with BT I got around 13mb, since moving to Sky this has increased to about 14.5. As far as I know my line condition is fine. The BT Checker says I should expect around 16.5. Ranging between 15 - 18.5mb possible.

     

     

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