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    Low sync rate

    This is a discussion on Low sync rate within the Sky Broadband help forums, part of the Sky Broadband help and support category; Hi guys I have just migrated from Orange ADSL to Sky's Unlimited package with Sky Talk. The exchange is LLU ...

    1. #1
      kieransymes's Avatar
      kieransymes is offline Sky User Member
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      Angry Low sync rate

      Hi guys

      I have just migrated from Orange ADSL to Sky's Unlimited package with Sky Talk. The exchange is LLU enabled by Sky.

      When I first had the service, my connection was synced between 2000kbps and 3000kbps and stayed within that range for a few weeks. For some reason over the last day or two my line rate has gone down to around 1000kbps. A few days before, I had a play about with using my own router but decided to go back to the Sky 2504n as the connection felt slower.

      I am currently connected at the test socket. Everything is filtered fine.

      Here are my line stats:

      ADSL Link Downstream Upstream
      Connection Speed 1022 kbps 606 kbps
      Line Attenuation 68.0 dB 39.3 dB
      Noise Margin 7.0 dB 8.6 dB
      To be honest, I normally wouldn't worry too much about the bandwidth as i'm not a huge downloader. But I play on Xbox Live alot and find that since the sync rate has been 1024kbps, games are suffering from lag.

      On Orange, I always had 3mbps but moved as I always had MTU issues.

      Can anybody give me some advice on how to get the sync rate back up? If anybody can help with this, it would be much appreciated.


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    3. #2
      kieransymes's Avatar
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      Re: Low sync rate

      I just swapped to my Netgear DGN1000 and here's my stats:

      ADSL Link Downstream Upstream
      Connection Speed 1024 Kbps 605 Kbps
      Line Attenuation 64.4 dB 14.2 dB
      Noise Margin 7.4 dB 14.2 dB
      So attenuation is lower by 4dB but still stuck at approx 1000kbps.

      Thanks again

    4. #3
      kieransymes's Avatar
      kieransymes is offline Sky User Member
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      Re: Low sync rate

      Ahhh...

      Testing on your broadband connection began on
      10/03/2012
      and will be completed within 10 days.
      I'm assuming this could be causing my problem?

      I have not been with Sky for long so i'm not sure why they are doing these tests. I have been with them long enough to ensure the first set of tests completed - I think I went live around the 20th Februrary.

      Could it be that swapping the routers or power cycling triggered Sky to start these tests?

      What can I do to ensure I get the best speed?

    5. #4
      Scubbie's Avatar
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      Re: Low sync rate

      Different routers calculate the Line Attenuation differently and some will display their individual maximum on a long line such as yours.

      Don't panic too much at the moment about upsetting DLM. I am thinking that you might be able to get a better connection speed on G.DMT (aka ADSL1), but this will not be able to be tried until DLM has completed.

      In the mean time, could you perform a couple of simple tests please?

      Using a corded telephone, plugged into the Test Socket, could you perform a 'quiet line test' by dialling '1' and listening carefully for any noise. You may hear a high pitched noise akin to a Fax machine (but higher pitched) or perhaps a little hiss, but ideally it should be quiet. There should be no clicking or loud hissing.

      Could you also post your connection stats from the Test Socket please.

      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

    6. #5
      kieransymes's Avatar
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      Re: Low sync rate

      Hi Scubbie, thanks for your reply.

      I have done the quiet line test and the line was pretty much silent.

      I think the stats I have posted are from the router being in the test socket. For clarity, i'll post stats with and without the faceplate. We do have a simple extension that was installed by a BT engineer when we had a fault as it was easier than replacing the whole cable that had gone bad. The extension has the sky box and telephone connected to a filter. The main socket has just the router with another filter. The extension is wired into the master socket's faceplate and not the type that plugs into the main socket.

      With faceplate:
      ADSL Link Downstream Upstream
      Connection Speed 1024 Kbps 605 Kbps
      Line Attenuation 64.4 dB 13.1 dB
      Noise Margin 8.0 dB 13.1 dB
      Without faceplate at test socket:
      ADSL Link Downstream Upstream
      Connection Speed 1024 Kbps 605 Kbps
      Line Attenuation 64.4 dB 13.0 dB
      Noise Margin 8.3 dB 13.0 dB
      Both were using the Netgear DGN1000.

      Thanks for your help.

    7. #6
      Scubbie's Avatar
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      Re: Low sync rate

      Quote Originally Posted by kieransymes View Post
      I have done the quiet line test and the line was pretty much silent.

      I think the stats I have posted are from the router being in the test socket. For clarity, i'll post stats with and without the faceplate. We do have a simple extension that was installed by a BT engineer when we had a fault as it was easier than replacing the whole cable that had gone bad. The extension has the sky box and telephone connected to a filter. The main socket has just the router with another filter. The extension is wired into the master socket's faceplate and not the type that plugs into the main socket.
      Could you unplug the Sky STB and telephone and reset the router (i.e. power cycle it) and repost the stats please.

      There are many posts regarding Sky STBs causing problems. The installers use a splitter that they put the telephone wire into, which feeds the back of the Sky STB. This splitter can be mistaken for a microfilter, but it isn't. It also carries some worrying wording, implying that it must be left in 100% of the time. This isn't quite the case.

      Also sometimes the Sky STB needs to be double filtered.

      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

    8. #7
      kieransymes's Avatar
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      Re: Low sync rate

      Hey

      Just done that - so absolutely everything is disconnected except for the router through a filter. Here's the stats:

      ADSL Link Downstream Upstream
      Connection Speed 1024 Kbps 605 Kbps
      Line Attenuation 64.4 dB 12.9 dB
      Noise Margin 8.2 dB 12.9 dB

    9. #8
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      Re: Low sync rate

      Still no significant change.

      I would suggest that you give Sky a call and ask if someone can place you on 'G.DMT' (aka ADSL1) and reconfigure your line to see if they can get something better out of it.

      Be prepared to make more than one call. Not all of Sky's staff have access to the systems that allow them to reconfigure a line and fewer will understand what you are asking. Don't let the person restart DLM as this will not change you to ADSL1.

      You have a little room for improvement, but it isn't huge. I suspect that there may be a build up of errors too. This will be something that they can see at Sky.

      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

    10. #9
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      Re: Low sync rate

      Hi Kieran

      before you ring sky as scubbie said to do.... can you answer this question for me

      how long have you had your wireless 2504n router for and did you notice when you switched this router on... did your speed go down

    11. #10
      kieransymes's Avatar
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      Hi Scubbie

      I will give them a ring when I get a chance. Do you think there's a chance it will just sync at a higher rate if I left it until after DLM?

      @thecarer

      Basically, it was synced at between 2-2.5mbps and then a few days ago noticed it was at 1mbps. It was a day or two after I played about with getting my Netgear DGN1000 to work. I tend the leave the router turned on all the time and there was no turning off or rebooting the router before I noticed the slower sync rate.

      The DGN1000 is about 1 year old and the 2504N is literally about 3 weeks old.

      If you have any other ideas it would be much appreciated. I don't fancy phoning Sky as you guys seem to know more

      Thanks for the help!!


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