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    Nightly disconnects - wont reconnect until router rebooted

    This is a discussion on Nightly disconnects - wont reconnect until router rebooted within the Sky Broadband help forums, part of the Sky Broadband help and support category; Ahha, many thanks for that - shame the people I've been speaking to at Sky TS don't seem to know ...

    1. #11
      sparrie2k's Avatar
      sparrie2k is offline Sky User Member
      Exchange: NEL
      Broadband ISP: Max
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      Newcastle upon Tyne
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      Re: Nightly disconnects - wont reconnect until router rebooted

      Ahha, many thanks for that - shame the people I've been speaking to at Sky TS don't seem to know this!

      You don't know why my connection is so bad do you

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    3. #12
      Saturday's Avatar
      Saturday is offline Sky User Super Mod
      Broadband ISP: Sky Broadband Unlimited Pro
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      Sep 2006
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      Re: Nightly dicsonnects - wont reconnect until router rebooted

      Quote Originally Posted by sparrie2k View Post
      The errors only appear to be high when the SNR drops - during the day they are quite low.
      That's the way it works.

      The router negotiates a noise margin with the exchange equipment when it is booted/connected. This should be sufficient to give the router ample differentiation between signal and noise. However, if the margin drops then the router begins to struggle to differentiate and errors begin to occur. There are two problems that can get in the way of the "right" noise margin.

      The first is that the noise margin changes through the day and as yet, in common with other ISPs, Sky haven't managed to implement SRA which would allow the router to readjust to the changing line conditions i.e adjust the margin as needed. This is almost certainly the cause of the nightly disconnections you raised at the beginning of this thread (e.g. your noise margin was only 5.6db in your first set of stats).

      The second is that the noise margin the router negotiates is set for a typical line. If the line is not typical e.g. it is subject to high induced noise from time to time then the margin will be insufficient. Note also that the normal daily noise margin "swing" is greater on problem lines.

      As has been pointed out you have line errors. They would appear to be arising in the BT part of your line as shown by the test socket results. they may be, they may not be. It could be the microfilter, router or router cable or even you've plugged into it with a splitter or extension lead (has been known). Another fairly common problem is interference from other electrical devices especially TVs and Dect phones (lots of interference when close by). If it is the BT line then this can be a problem to get BT to take seriously. They're only interested in voice faults. Don't mention ADSL, keep complaining about noise/crackles etc.

      Lastly, now you've got T3 involved it's hard to know exactly what they've done to your connection though your latest stats look normal. To answer your question, you're not on Fast, that's just a reporting issue between the router and the exchange equipment. With regards to your question about sync, noise margin etc, please see the first sticky in my signature which explains the relationship between sync and noise. The upshot is that you were connecting at 9476kbps but that was with a noise margin of 5.6db. Now you're connecting at 6822kbps with a noise margin of 9.3db. That's the way it works.


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