Broadband line 'noise'

Discussion in 'Community Discussion' started by Dagless, Aug 6, 2009.

  1. Dagless macrumors Core

    Dagless

    Joined:
    Jan 18, 2005
    Location:
    Fighting to stay in the EU
    #1
    About 2 years back we signed up to BT Broadband. At first we got 2Mb download speeds but this has dropped to a pretty terrible 600-800Kb. Rang up BT today because I'm kinda fed up with it. They ran some tests on the line and said there was noise on the line (other than me shouting down it to be faster :rolleyes:).
    They're going to fix it in a couple of days but I'm just wondering if noise is really responsible for such a drop in download speeds and overall quality, sometimes the internet will be fast but cut off every few seconds for a second?
     
  2. ct2k7 macrumors 603

    ct2k7

    Joined:
    Aug 29, 2008
    Location:
    London or Florida
    #2
    Yes, I assume they are talking about line attentuation.

    Do you have a new style network in your house with a master box? NTE5 face-plate is what you are looking for. Plug your modem directly into the test socket behind the faceplate and check the stats, and see if it keeps dropping out.
    Do you use ADSL filters?
     
  3. Dagless thread starter macrumors Core

    Dagless

    Joined:
    Jan 18, 2005
    Location:
    Fighting to stay in the EU
    #3
    Yea we have ADSL microfilters. As for everything else the house is about 14 years old and still using the original phone/outlet setup. Which probably isn't doing the connection much good (the internet connection cuts off for 20 seconds if the phone rings, we have DECT phones).
     
  4. yg17 macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #4
    Enough noise could make the connection crap out completely, so yeah, it's feasible that some noise could cause a drop like that.
     
  5. xUKHCx Administrator emeritus

    xUKHCx

    Joined:
    Jan 15, 2006
    Location:
    The Kop
    #5
    If your internet cuts of when a phone call comes in you need to check your filters as this is a common sympton of poor filtering, basically a call comes in bumps up the noise on the line and drops the internet.

    You can do a quiet line test, dial 17070 from preferably a corded phone and I think it is option 2.

    You can test all the connection points and microfilters, I have done this previously and found a slightly dodgy microfilter which was causing the internet to sometimes fluff out and since replacing it the connection syncs at about 800kb faster than before.

    Line noise can be a real problem.
     
  6. Counterfit macrumors G3

    Counterfit

    Joined:
    Aug 20, 2003
    Location:
    sitting on your shoulder
    #6
    You need to drop the electrons and get with the photons! :D
     
  7. neiltc13 macrumors 68040

    neiltc13

    Joined:
    May 27, 2006
    #7
    I see you live in Manchester, which means you're likely in range of a much better ISP's service.

    Type your phone number into www.SamKnows.com and it will show a list of LLU providers who can give you better service for less money. Many of these providers use ADSL2+ technology, which is far superior to BT's standard ADSL.
     
  8. trule macrumors 6502

    Joined:
    Mar 16, 2007
    #8
    Yes, probably a cable is loose or damaged somewhere in the exchange or street cabinet, in the worst case water may have entered an underground cable.
     
  9. Dagless thread starter macrumors Core

    Dagless

    Joined:
    Jan 18, 2005
    Location:
    Fighting to stay in the EU
    #9
    Unfortunately we can't get fibreoptic cable here, they just never installed it on this road. All we can get is ADSL. Been through a couple of providers too, they all start off fast but after 6-12 months they (seemingly) knock the speed down. We're stuck until BT add them fancy new 40-50mbps lines in the next 6 months.

    Just found a super secret diagnostics page on my router, Jimmy boy here has a noise margin of 15.2-17db (download and upload) and a line attenuation of 63.5-31.5db. They seem extraordinarily high compared to others I've seen online.
     

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