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    Noisy/Unstable line after power surge

    This is a discussion on Noisy/Unstable line after power surge within the Sky Broadband help forums, part of the Sky Broadband help and support category; Hi guys, I'm after a bit of advice. During the thunderstorms we had about 10 days ago, a powersurge took ...

    1. #1
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      Noisy/Unstable line after power surge

      Hi guys,

      I'm after a bit of advice.

      During the thunderstorms we had about 10 days ago, a powersurge took out my master socket/faceplate filter and my Sagem router.

      Sky very promptly sent me out a replacement router, this time a Netgear and after a slight mix-up, eventually got an engineer out to look at the line. He replaced the master socket and all was fine. Router plugged back and was back online.

      Before this all happened I was very happy with my connection. I had rewired everything after reading advice on here with decent cable and an ADSLNation faceplate filter. With this all in I was getting a nice and stable 6.8Mbps.

      Now, because the ADSLNation faceplate filter had blown, I was left with using the filter supplied by Sky until I could buy a replacement. My connection now was not so good. I was struggling to stay above 5Mbps and in the evening this dropped to 4.5Mbps.

      I thought I'd wait until I got my faceplate replacement before I got too concerned but once it arrived, it made no difference.

      Then on Saturday, the line went again. No dial tone. No broadband.

      Sky arranged for an engineer on Monday morning and I'm back online. I'm not sure what he did as I wasn't there. But we're back. Unfortunately my connection is still not what it once was. I've contacted Sky via the website form, but they've not really given me much, just advised I checked my filter...

      So, does anyone have any ideas? Has the powersurge damaged something somewhere else? I have a junction box where the drop cable comes in the wall, could this be screwed? (I think this is what the second engineer looked at). Is the Netgear just an inferior router? Could the surge have damaged the line itself?

      I'll be very disappointed if I'm stuck like this. It's not that 5Mbps is anything to cry about, but I was so pleased with myself that my rewiring had made such a difference I'd be loathe to go backwards!


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    3. #2
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      Re: Noisy/Unstable line after power surge

      Post your stats and lets see, Sky could have put DLM back on the line.

    4. #3
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      Re: Noisy/Unstable line after power surge

      I'll post them when I get home.

      The note back from Sky said: "I have calibrated your line to the optimum without causing intermittent dropout".

      Whatever that means.

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      Re: Noisy/Unstable line after power surge

      It means they will have capped your connection speed.

    6. #5
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      Re: Noisy/Unstable line after power surge

      Well if thats the case, it fluctuates a lot for a capped connection. Or does capping just introduce a ceiling?

      My stats tonight are:

      ADSL Link Downstream Upstream
      Connection Speed 4512 kbps 864 kbps
      Line Attenuation 43 db 12 db
      Noise Margin 2 db 14 db

      Which is crazy because before the power surge, I was comfortably seeing speeds of 6.8-7Mbps with noise margins of around 6db.

      When I got in this evening I was connected at 4.8Mbps as you can see it's now dropped slightly and with a noise margin of 2db, I imagine will drop further.

      Not sure why there is such a difference...

    7. #6
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      Re: Noisy/Unstable line after power surge

      Something has been fried.

      Have you tried another filter and the test socket?

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      Re: Noisy/Unstable line after power surge

      I tried the filter that Sky provided when the master was replaced (because my faceplate was dead). I now have a new ADSLNation faceplate - which was superb last time.

      I haven't tried with a filter direct in the test socket. I'll give it a go. (when the missus is off the phone)

      I also think I'll replace the junction box the drop cable goes into. I'm surprised it's still alive at all.

    9. #8
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      Re: Noisy/Unstable line after power surge

      If you don't mind a bit of playing about with wires, you could always remove the master socket completely and fit it directly to the drop wires were the junction box is (only for a test of course, don't leave it there).

      You could then connect the router directly to it and see what stats you get, this will rule out any damage to the internal wiring etc and at least give you an idea where to start.

      If it's still bad there, you know it is BT's problem from then on!

    10. #9
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      Re: Noisy/Unstable line after power surge

      I certainly don't mind messing with the wiring. I only recently moved the master socket anyway. It used to be by the front door and was old and yellow.

      I wouldn't have thought there would be any wiring issues. The current setup is: drop cable into junction box. Then from there the brand new cable I put in (the pro+ stuff from asdlnation) straight into the new master socket by my desk. Probably around 5 metres maximum. Then a 0.5 metre pro+ modem cable from the master to the router.

      Although I see what you're saying. Drop cable direct to master would certainly rule out any melted cables internally! At least I have plenty of cable left...

      I'll give it a go. Thanks for the advice :O)

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      Re: Noisy/Unstable line after power surge

      There is a chance that a couple of the connections somewhere have tarnished if they have had a jolt, this should rule out any on your side. Make sure all the connections look clean and shiney.

     

     
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