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    DLM, slow speeds

    This is a discussion on DLM, slow speeds within the Sky & DLM forums, part of the Sky Broadband help and support category; Hi, this may be a silly question. After recent bad weather causing repeated disconnects, DLM has now finished and decided ...

    1. #1
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      DLM, slow speeds

      Hi, this may be a silly question. After recent bad weather causing repeated disconnects, DLM has now finished and decided that 2560Kb/s is a good speed for our Sky Broadband Unlimited line. Prior to this we were getting 12-14Mb/s with no issues.

      I would want to contact Sky to get them to remove the cap on our line, but unfortunately am not the account holder. The account holder is very busy and cannot contact Sky, so no chance of this. My question is a) will the cap remove itself naturally over time? or b) whether repeatedly rebooting the router will trigger DLM to reassess the line, and would this increase speeds back to what they were if it detects the line as stable after its assessment?

      Many thanks!


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      Re: DLM, slow speeds

      It really depends on whether the bad weather has caused any permanent damage. Can you perform a quiet line test and are you able to access the routers stats to check noise margins?

      Repeated disconnections could trigger DLM but it usually has the reverse effect of causing further reductions in connection speed.
      If the line is capable of supporting a faster speed it should recover incrementally though it could take up to a month to stabilise.

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      Re: DLM, slow speeds

      I doubt that it has, as the speeds during DLM were fine unless there was more bad weather (which then caused more disconnects). Noise margins are 22.9 Down, 18.18 Up, although I imagine they're so high because the system would have set them this high after lots of weather (thankfully its sunny now!).

      Will the system reduce these noise margins over time to allow for faster speed? Or is the cap set by DLM permanent until removal requested?

      btw, thanks for the help!

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      Re: DLM, slow speeds

      Unless a manual cap has been set DLM (maintenance as opposed to training) runs continually so yes provided the good weather continues your speed will recover though it could be a very slow process.

      I am wondering why bad weather causes such variance in speed. A long line which predominantly uses overhead cabling could explain this but for a standard line it would suggest that there is a latent fault which should be investigated. If the account holder uses this service I would expect that (busy or not) they would investigate why the service is so poor. Could you not get permission from the account holder, which would probably require a password, to call Sky broadband technical support on their behalf?

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      Re: DLM, slow speeds

      It is an overhead cable, unfortunately. Would a manual cap be placed on our line without us having called in any faults, or is this case more likely to be training?

      I wish they would give me permission, I have asked, many times, and the answer is always 'no'. My other housemates only really use the internet for university work and mild youtube use, so they aren't really seeing anything wrong with it, no matter how much I try to explain.

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      Re: DLM, slow speeds

      If there hasn't been any contact with Sky regarding the state of the connection it is unlikely that a manual cap has been applied. If it is not possible to discuss the situation with Sky I would wait (at least ten days) to see if there is some improvement. If you have access to the router's admin screens you could check on the uptime as automatic reboots, particularly during the early hours of the morning, could indicate DLM activity.

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      Re: DLM, slow speeds

      Thank you, very much! It's nice to finally be able to get a straight answer, so this is appreciated. I guess I should just wait.

     

     

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