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    Sudden drop in sync speed.

    This is a discussion on Sudden drop in sync speed. within the Sky Broadband help forums, part of the Sky Broadband help and support category; Hi, I've been on Sky Unlimited for 5 years with a stable connection of 3.5 - 4 megs, but in ...

    1. #1
      KaratemanBruiseOnInside's Avatar
      KaratemanBruiseOnInside is offline Sky User Member
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      Sudden drop in sync speed.

      Hi,

      I've been on Sky Unlimited for 5 years with a stable connection of 3.5 - 4 megs, but in the last couple of days this has dropped to 1024 kbps and the noise margin has been going haywire - one minute it's as low 5db then 10 secs later it has shot up to around 27db and then back down again. I'm pretty sure it's a problem with the line to the exchange as I've tried swapping filters, using the test socket, rebooting at peak times and using a different router, but it will not sinc above 1024kbps. Any ideas on what the problem could be?

      Here are my stats

      System Up Time 00:39:28 Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time WAN PPPoA 11567 11960 0 722 4892 00:37:55 LAN 10M/100M 2 0 0 0 0 00:39:25 WLAN 11M/54M 13054 12977 0 5038 816 00:39:18
      ADSL Link Downstream Upstream Connection Speed 1024 kbps 686 kbps Line Attenuation 47.5 db 30.5 db Noise Margin 6.9 db 10.0 db


      System Up Time 00:40:28 Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time WAN PPPoA 11586 11979 0 704 4767 00:38:55 LAN 10M/100M 2 0 0 0 0 00:40:25 WLAN 11M/54M 13133 13063 0 4927 799 00:40:18
      ADSL Link Downstream Upstream Connection Speed 1024 kbps 686 kbps Line Attenuation 47.5 db 30.5 db Noise Margin 26.9 db 10.0 db
      System Up Time 00:41:28 Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time WAN PPPoA 11617 12010 0 687 4649 00:39:55 LAN 10M/100M 2 0 0 0 0 00:41:25 WLAN 11M/54M 13225 13162 0 4823 783 00:41:18
      ADSL Link Downstream Upstream Connection Speed 1024 kbps 686 kbps Line Attenuation 47.5 db 30.5 db Noise Margin 7.4 db 10.5 db
      Any help would be appreciated


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    3. #2
      Scubbie's Avatar
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      Re: Sudden drop in sync speed.

      There are a couple of things that I would do.

      The first would be to perform a quiet line test. Using a corded telephone in the Master Socket, dial '1' and listen carefully for any noise on the line. If there is any crackling or a large amount of hiss (not to be confused with the high-pitched noise like a fax machine), then you have a Line problem. Call your line provider (i.e. whom ever you pay your line rental to) and report the noise. Don't mention issues with your broadband as this will confuse the issue.

      Second would be to replace any microfilters. Generally microfilters last for about 2 years. If you have an NTE5 socket, then a filtered faceplate would be a good idea.

      Third, I notice that your exchange is being upgraded soon to support Fibre. There have been several instances of members on this forum complaining that when they had Fibre installed locally, that there connection speeds dropped.

      Fourth on my initial list would be to check your router. If you have still got the original router, or one that is a few years old now, there is a possibility that the Modem part is wearing out. It might be possible to call Sky and get a replacement. If you are pushed, consider the Sagem 2504N for 35, unless you intend to migrate to Sky Broadband Unlimited Fibre in the summer.

      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

    4. #3
      KaratemanBruiseOnInside's Avatar
      KaratemanBruiseOnInside is offline Sky User Member
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      Re: Sudden drop in sync speed.

      Thanks for the reply - it was a line fault, and after a few calls got it cleared. However, my connection speed is still painfully slow, so the question now is will it automatically rise to the speed before, or will I have to call up Sky to change it from their end? (I've had enough of customer services).

      Here are my current stats:

      System Up Time 00:15:00
      Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
      WAN PPPoA 1495 1506 0 277 2016 00:13:32
      LAN 10M/100M 4 0 0 0 0 00:14:57
      WLAN 11M/54M 1730 1925 0 1966 312 00:14:50
      ADSL Link Downstream Upstream
      Connection Speed 512 kbps 576 kbps
      Line Attenuation 48.0 db 30.7 db
      Noise Margin 23.0 db 12.5 db

      Before it was around 4mb.

      Thanks.

    5. #4
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      Re: Sudden drop in sync speed.

      Ring Sky mate, you have the same attenuation as myself, and I get roughly 6.2 meg - 12 times more than yourself.




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    6. #5
      KaratemanBruiseOnInside's Avatar
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      Re: Sudden drop in sync speed.

      Will do - woke up this morning to find it's got worse!

      System Up Time 08:56:41
      Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
      WAN PPPoA 1299 1450 0 7 65 06:37:57
      LAN 10M/100M 19 0 0 0 0 08:56:38
      WLAN 11M/54M 22135 24972 0 684 98 08:56:31
      ADSL Link Downstream Upstream
      Connection Speed 384 kbps 625 kbps
      Line Attenuation 47.5 db 30.6 db
      Noise Margin 33.1 db 11.5 db

    7. #6
      KaratemanBruiseOnInside's Avatar
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      Re: Sudden drop in sync speed.

      Called Sky and spoke to a nice lady who informed me that I had been put on DLM due to bad line. Did a manual reconfiguration and put my speed up to just under 5mb. I'll keep an eye on the noise margin for a while just to make sure everything's cushty.
      Might move my phone over to Sky, because just trying to get my current provider to even acknowledge there was a problem was a struggle.

     

     

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