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    Line settings question

    This is a discussion on Line settings question within the Speed tests and how to get better results forums, part of the Sky Broadband help and support category; Okay, this is probably insignificant just now, but if speedups are on their way it might become more meaningful. I ...

    1. #1
      alanpotter's Avatar
      alanpotter is offline Sky User Member
      Exchange: Polmont
      Broadband ISP: Sky Max
      Router: Sagem F@ST 2504
      Sky TV: Sky Basic
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      Line settings question

      Okay, this is probably insignificant just now, but if speedups are on their way it might become more meaningful.

      I was previously on Be internet, getting around 22Mbps downstream. Then I bought Sky TV, and realised I couldn't justify the extra expense of Be as compared to Sky as my ISP.

      All went well for a while, but I started getting disconnections on my Sagem router. My line speed was lowered, the disconnections continued. Then Sky sent out a Netgear modem, and everything became lovely and stable again However, I completely forgot to get my line speed re-upgraded.

      So today I rang Sky and asked for the speed to be increased. The nice lady spoke to her manager, who "did something" to increase the speed. And that took me to these stats:

      ADSL Link...........Downstream......Upstream
      Connection Speed....14970 kbps......764 kbps
      Line Attenuation....19 db...........10 db
      Noise Margin........14 db...........18 db

      And in truth I'm not complaining, but I think I can do better. And while I don't care too much, if Sky does start increasing line speeds I want to be sure that I am in the list (in fact, given that I use online backup of all my data, I'm more concerned about a faster uplink than downlink).

      So, should I just leave it and see what happens, or should I go back to Sky and ask for a further bump in my speed? I don't believe that I am being limited by line conditions...

      One further question: I have been trying to understand noise margin. Saturday tell us that noise margin is a measure of the margin that the modem has given itself over the line noise. So does that mean that there is some way to ask the modem to be willing to "give it a go" at a lower noise margin, and thus get greater speed at the risk of increased instability?

      Many thanks,


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    3. #2
      Smithy99's Avatar
      Smithy99 is offline Sky User Member
      Exchange: Irby
      Broadband ISP: Max
      Router: Netgear V1 DG834GT
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      Re: Line settings question

      You cannot set the NM, Sky do but they set it to a minimum of 6.9db. As your's is higher than that you should be able to gat more speed without loosing the stability.

      With your attenuation and a good line I would expect you to get the 22mb again if/when Sky bring it on.

      Ring CST after 10:30pm and ask them to remove the cap.

    4. #3
      Isitme's Avatar
      Isitme is offline Sky User Moderator
      Exchange: Bannockburn
      Broadband ISP: Sky Fibre Unlimited
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      Central Scotland
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      Re: Line settings question

      There are tools available which allow you to change the SNR, such as the DMT Tool but it may not work with your router. Further info can be found here -

      I don't think using the tool to lower your SNR is a good idea, it can lead to instability, which if the Sky system picks it up, it will cap the line. You could end up worse off

      As Smithy says you have a good SNR so your line should deliver a good bit more without tweaking.


      Please note the views and recommendations in my posts are my own and in no way reflect the views of SkyUser.

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