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    How Annoying!

    This is a discussion on How Annoying! within the Sky Broadband help forums, part of the Sky Broadband help and support category; This really does have me baffled! Some of you may remember me posting a few weeks ago about my connection ...

    1. #1
      MikeLeeds's Avatar
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      How Annoying!

      This really does have me baffled!

      Some of you may remember me posting a few weeks ago about my connection being lost in the evening due to a reduction in noise margin levels.

      Well, about three weeks ago I connected to find my noise margin level at over 27dB! So I left the router switched on and the connection remained between 24 and 28dB. Great! However, at around 3am yesterday, after around 450 hours of continuous connection with no dropouts at all, something happened which meant the router and connection had been rebooted! It's now back to the usual noise margin level of no more than about 12dB, lower in the evenings until it drops the connection and needs rebooting. However, the downstream rate has increased from around 700kbps when the noise margin was in its mid-20s, to 3500kbps!

      What's going on there? How did it get the large noise margin level in the first place, and why has it lost it now? Hopefully it'll come back again!

      Cheers.


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    3. #2
      Koala5's Avatar
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      Re: How Annoying!

      I think I read somewhere that there is a bug in the router firmware which can make it report the wrong figures, not sure whether it was noise margin or attenuation I read about. Anyway it might be worth getting your detailed stats and post them here to see if they show anything, use this. Sky Netgear DG834GT utility version 0.4

    4. #3
      MikeLeeds's Avatar
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      Re: How Annoying!

      Hi. Thanks for the reply. I got the detailed stats, as follows:

      /usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: INTR, Upstream rate = 416 Kbps, Downstream rate = 3488 Kbps
      Link Power State: L0
      Mode: G.DMT
      Channel: Interleave
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 6.9 13.0
      Attn(dB): 61.0 31.5
      Pwr(dBm): 18.3 4.1
      Max(Kbps): 3808 960
      Rate (Kbps): 3488 416
      G.dmt framing
      K: 110(0) 14
      R: 16 16
      S: 2 16
      D: 64 8
      ADSL2 framing
      MSGc: 1 1
      B: 110 14
      M: 2 16
      T: 1 1
      R: 16 16
      S: 2.1441 17.0666
      L: 888 120
      D: 64 8
      Counters
      SF: 592760 592758
      SFErr: 213 0
      RS: 20153844 2519221
      RSCorr: 36984 598
      RSUnCorr: 3754 0

      HEC: 182 0
      OCD: 1 0
      LCD: 0 0
      Total Cells: 82891822 0
      Data Cells: 886503 0
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 117 0
      SES: 110 0
      UAS: 21 0
      Total time = 2 hours 48 min 24 sec
      SF = 592760
      CRC = 213
      LOS = 277
      LOF = 0
      ES = 117
      Latest 1 day time = 2 hours 48 min 24 sec
      SF = 592760
      CRC = 213
      LOS = 277
      LOF = 0
      ES = 117
      Latest 15 minutes time = 3 min 24 sec
      SF = 12057
      CRC = 0
      LOS = 6
      LOF = 0
      ES = 6
      Previous 15 minutes time = 15 min 0 sec
      SF = 52930
      CRC = 87
      LOS = 51
      LOF = 0
      ES = 16
      Previous 1 day time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
      SF = 52931
      CRC = 4
      LOS = 24
      LOF = 0
      ES = 14
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 52930
      CRC = 48
      LOS = 70
      LOF = 0
      ES = 16
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF = 52931
      CRC = 8
      LOS = 17
      LOF = 0
      ES = 12

    5. #4
      iainxxx's Avatar
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      Thumbs down Re: How Annoying!

      I dream of noise margin of over 7!
      Will have to make this a quick post as I have lost my connection 6 times this evening already. Haven't got the will to call technical support again - will try tomorrow.


    6. #5
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      Re: How Annoying!

      Mmmm you have quite a few errors there but I have seen worse, also your attenuation is high indicating you are some distance from the exchange? have you tried plugging into the master test socket? Also I take it you have turned uPNP off in the router menu?

    7. #6
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      Re: How Annoying!

      Quote Originally Posted by Koala5 View Post
      Mmmm you have quite a few errors there but I have seen worse, also your attenuation is high indicating you are some distance from the exchange? have you tried plugging into the master test socket? Also I take it you have turned uPNP off in the router menu?
      Yes, the uPNP is turned off. Assuming the exchange is the Rothwell exchange, which appears to be the closest, then the distance from my house to the exchange is around 1.5 miles. I haven't tried plugging into the master test socket as my cable isn't long enough to reach it, so it's just plugged into an additional socket upstairs, along with the Sky DigiBox.

      If I leave the router plugged in and powered up all the time, then it seems to just about make it through the evening without getting such a low noise margin that it disconnects/needs rebooting - as if it gains momentum during the day that carries it through the evening, just! At least that's what's happened for the past couple of days.

      Are line errors normal, or should there be none at all, ideally?

      Cheers.

      I dream of noise margin of over 7!
      Will have to make this a quick post as I have lost my connection 6 times this evening already. Haven't got the will to call technical support again - will try tomorrow.
      You have my sympathy! Reminds me of Tiscali at Christmas time.

    8. #7
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      Re: How Annoying!

      You really need to try that test socket because that will isolate the fault to the BT line or your internal wiring, i.e. if problem persists when plugged into the test socket then the fault is on the line, in my case it was internal wiring and disconnecting the bell/ring wire fixed the problem. Errors will never be zero but the lower the better, lots of errors means the router is working hard trying to correct them all the time.

      Pin 3 Orange and white I beleive is the bell/ring wire try disconnecting it in any extension box's and the master. It will not effect modern phones, i.e. wont stop then ringing.
      Last edited by Koala5; 24-05-07 at 10:39 PM.

    9. #8
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      Re: How Annoying!

      Quote Originally Posted by Koala5 View Post
      You really need to try that test socket because that will isolate the fault to the BT line or your internal wiring, i.e. if problem persists when plugged into the test socket then the fault is on the line, in my case it was internal wiring and disconnecting the bell/ring wire fixed the problem. Errors will never be zero but the lower the better, lots of errors means the router is working hard trying to correct them all the time.

      Pin 3 Orange and white I beleive is the bell/ring wire try disconnecting it in any extension box's and the master. It will not effect modern phones, i.e. wont stop then ringing.
      Thanks for the info. I'll see what I can do when I get chance.

     

     

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