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    Help, lowering SNR leads to no increase in download speed

    This is a discussion on Help, lowering SNR leads to no increase in download speed within the Sky Broadband help forums, part of the Sky Broadband help and support category; Hello, I am a new member who just purchased Billion 7800N with the hope of gaining a respectable download speed. ...

    1. #1
      Babaikram's Avatar
      Babaikram is offline Sky User Member
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      Help, lowering SNR leads to no increase in download speed

      Hello, I am a new member who just purchased Billion 7800N with the hope of gaining a respectable download speed.

      My initial stats yesterday before installing the Billion were:

      ADSL

      ADSL Firmware Version: FwVer:3.11.2.175_TC3086 HwVer:T14.F7_6.0

      Line State: Showtime

      Modulation :ADSL2 PLUS

      Annex Mode : ANNEX_A



      Downstream Upstream

      SNR Margin : 9.0. 15.8db

      Line Attenuation: 58.5. 36.6db

      Data Rate: 1536. 605kbps

      Max Rate: 3732. 945 kbps

      POWER: 14.7. 6.3dbm

      CRC: 0 0


      During this time, I have carried out the master phone socket test without any difference, nevertheless, I moved my ADSl line to the master phone socket, installed an interstitial plate into the socket and use two microfilter in a 'daisy chain' to separate the phone and modem connection to no avail, I even tried TP link modem and wireless routers (8040T and WR1080ND). All this to no avail. From the above stats and my broaband speed test website I should be able to get to a maximum of 4MBps download speed but I have never got up to 1.6Mbps.




      Help, lowering SNR leads to no  increase in download speed-adsl-status.jpg

      Help, lowering SNR leads to no  increase in download speed-adsl-mode.jpg


      On account of this, I purchased Billion Bipac 7800N, set it up working and played with its ADLS mode configuration until I got the most stable and highest download speed of about 1.5Mbps as shown below

      After lower the SNR margin to 1.2db about 10hours ago, it has steadily climbed back to the present reading without any increase in my download speed as you can see above.

      What else can I do?



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    3. #2
      Isitme's Avatar
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      Re: Help, lowering SNR leads to no increase in download speed

      Your line speed will be capped. Until you can get Sky to raise the cap you will not get any improvement in speed, no matter how much you lower the noise margin on your router.

      Your attachments are too small to see properly by the way.

      TomD


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


      Useful Utilites

      Inssider 2/ TCPOptimiser /Test Socket

      Note - When downloading always select the Custom install or you will end up with stuff you don't want.





    4. The Following User Says Thank You to Isitme For This Useful Post:

      Babaikram (09-06-12)

    5. #3
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      Re: Help, lowering SNR leads to no increase in download speed

      The line is capped at 1536/608. Call Sky and ask them to reprofile the line - if you want to be cheeky, ask if you can be uncapped past the max attainable rates. At least that way you could then lower the SNR and see further increase.

    6. The Following User Says Thank You to User05 For This Useful Post:

      Babaikram (09-06-12)

    7. #4
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      Re: Help, lowering SNR leads to no increase in download speed

      I will try and call sky then.

    8. #5
      Babaikram's Avatar
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      Re: Help, lowering SNR leads to no increase in download speed

      Well I spoke to Sky and they were able to increase the download speed to about 2.2Mbps but later it degenerated to about 2Mbps and they instructed that I switch on my modem for the next 10 days when they try to improve and stabilise the line. However, I noticed that upload speed had reduced from 600kbps to about 250 kbps. When I replaced the sky Netgear DG934g, with Billion 7800n, it was able to push the downstream speed up to 2.3Mbps at SNR margin of 6db.

    9. #6
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      After tweaking BIllion 7800N, I am now getting 3069kbps downstream speed. Hurray!

    10. #7
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      Re: Help, lowering SNR leads to no increase in download speed

      Let's hope DLM does not pick up your 'tweaking' and knock the speed back.

      TomD


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


      Useful Utilites

      Inssider 2/ TCPOptimiser /Test Socket

      Note - When downloading always select the Custom install or you will end up with stuff you don't want.





    11. The Following User Says Thank You to Isitme For This Useful Post:

      Babaikram (11-06-12)

    12. #8
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      The download stream is almost reaching 4Mbps (3886Kbps) . The quoted maximum achievable has been between 3500kbps and 4000kbps. Thanks Isitme

    13. #9
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      In addition, the upload stream is now about 786Kbps with downstream/upstream margin of 9.1/14.1. Things are really looking up.

    14. #10
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      Re: Help, lowering SNR leads to no increase in download speed

      Quote Originally Posted by Babaikram View Post
      In addition, the upload stream is now about 786Kbps with downstream/upstream margin of 9.1/14.1. Things are really looking up.

      Are you on the Broadcom or Conexant at the exchange? See first post how to find out: What non-Sky router will give me the best speed.

      Be interested to know as I'm in same boat with Sky DG934G router looking to upgrade to billion a unit.

      Thanks
      Ian

     

     
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