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    Noise Margin issues

    This is a discussion on Noise Margin issues within the Sky Broadband help forums, part of the Sky Broadband help and support category; All I've been trying to read-up on suggestions for dealing with noise margin issues, but need some guidance on next ...

    1. #1
      waspie's Avatar
      waspie is offline Sky User Member
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      Noise Margin issues

      All

      I've been trying to read-up on suggestions for dealing with noise margin issues, but need some guidance on next steps.

      I've attached behaviour I've tracked this evening using RouterStats on my dlink 2640S -
      1. Effectively after a router reboot, my noise margin is 8dB
      2. if I open a line and disconnect, the noise margin does an immediate drop down to 0->1 dB.
      3. If I open a line and make a call, then disconnect, the resulting Noise Margin stabilises at 2dB and doesn't get any better.

      My setup

      1. Router is connected as exactly as described in example 1 on ::. Kitz - Splitter Install .:: - i.e. extension from master socket that I connect router to (through spliiter), and the phone to the master socket through a splitter

      2. I've moved the phone to the extension socket so both router and phone coming from extension with one filter, although same problem as above, i.e. doesn't matter if the phone is coming off master or extension.

      3. Master socket I believe is a LJU2 Master and I've not played with it.

      4. I've tried new filters - no avail.

      Any ideas of focus before calling BT out?
      Attached Thumbnails Attached Thumbnails Noise Margin issues-sky-noise-ratio-issues-03-12-11.jpg  


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    3. #2
      waspie's Avatar
      waspie is offline Sky User Member
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      Re: Noise Margin issues

      An update - I've placed the router and phone on a single ADSL Filter directly from the LJU2 master - rather than use the extension

      1. I get a slightly better Noise Margin of 8.2dB after a router reboot
      2. Get similar behaviour on opening a line - i.e. an immediate drop to 0dB at call start, but then during call - stabilises at 5dB and after call closes (1 minute duration) drops to 2dB resulting that I have over the extension as well.

      Slight crackling on the line as well.


    4. #3
      Scubbie's Avatar
      Scubbie is offline Sky User Moderator
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      Re: Noise Margin issues

      This is a sign of a line fault.

      Call whomever you pay the line rental to and let them know that you are getting a crackling noise on your line.

      If you are not with Sky Talk, don't mention the broadband as it will confuse things.

      Sky Fibre Unlimited Pro: Connected at 80,000 kbps / 20,000 kbps
      Previous ADSL2+ Speed 19999 kbps 1153 kbps, Line Attenuation 17.5 db 6.9 db, Noise Margin 7.5 dB 8.7 dB
      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

     

     

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