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    very very high attenuation of 71db!!

    This is a discussion on very very high attenuation of 71db!! within the Sky Broadband help forums, part of the Sky Broadband help and support category; hey guys now i know im going through dlm but should my attenuation really be this high!! Downstream Upstream Connection ...

    1. #1
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      very very high attenuation of 71db!!

      hey guys

      now i know im going through dlm but should my attenuation really be this high!!

      Downstream Upstream
      Connection Speed 739 kbps 400 kbps
      Line Attenuation 71.0 db 47.6 db
      Noise Margin 5.6 db 7.5 db


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    3. #2
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      Re: very very high attenuation of 71db!!

      ADSL Link Downstream Upstream
      Connection Speed 739 kbps 400 kbps
      Line Attenuation 71.0 db 47.6 db
      Noise Margin 19.2 db 11.5 db

      sky high noise margin now.....

    4. #3
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      Re: very very high attenuation of 71db!!

      Have you spoken to sky tech support? They can escalate to CST for DLM issues now.

    5. #4
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      Re: very very high attenuation of 71db!!

      Quote Originally Posted by samperry209 View Post
      now i know im going through dlm but should my attenuation really be this high!!
      Your attenuation is what it is. DLM can't change it per se. What it can do, and appears to have done in this case, is change ADSL mode.

      The router firmware will report a maximum attenuation of 63.5db on G.DMT i.e it will report 63.5db if the actual attenuation is higher than this.

      I've noticed that this restriction doesn't seem to apply with ADSL2+. What presumably has happened is that your attenuation was ~68db on G.DMT reported at 63.5db. DLM has moved you to ADSL2+ which has removed the reporting restriction and increased your attenuation by 3db (ADSL2+ will always result in an increase due to the different frequencies being measured - attenuation being a measure for a set frequency).

      There's something really odd going on with your connection if the sync is fixed (at 739kbps) and your noise margin has swung 13.6db in only 20 minutes or so. I suspect it's a reporting error (the noise margin, not the attenuation).
      Last edited by Saturday; 28-06-08 at 02:19 PM.

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      Re: very very high attenuation of 71db!!

      because i know my line is crap but i was getting a nice 2560kbps downstream

      then all of a sudden this has happenend...!

      can i somehow go back to gdmt?

      i want my 2560 back!!

      these are my stats atm bout 3 hours later

      ADSL Link Downstream Upstream
      Connection Speed 657 kbps 384 kbps
      Line Attenuation 71.5 db 47.3 db
      Noise Margin 4.5 db 7.0 db
      Last edited by samperry209; 28-06-08 at 02:41 PM.

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      Re: very very high attenuation of 71db!!

      Call Sky tech support, ask to be troubleshot for low speed, that will then get you escalated to CST once done.

    8. #7
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      Re: very very high attenuation of 71db!!

      ok thanks guys..

    9. #8
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      Re: very very high attenuation of 71db!!

      3 hours later

      bonkers set of stats

      ADSL Link Downstream Upstream
      Connection Speed 2048 kbps 406 kbps
      Line Attenuation 73 db 43.9 db
      Noise Margin -1.6 db 11.5 db

     

     

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