SNR Margin has halved - possible causes?

Discussion in 'Broadband' started by Iwan Davies, Oct 1, 2004.

  1. Iwan Davies

    Iwan Davies Guest

    Overnight the SNR Margin reading provided by my ADSL router has dropped by
    almost half from 18 dB to around 10 dB. Line attenuation has remained
    fairly stable at 56ish dB. On Wednesday evening, the upgrade to 1 Mbit was
    completed, and yesterday I was still getting 18 dB SNR. With this drop
    overnight, however, I've been losing the signal quite regularly. Nothing
    has changed in terms of the telephone system on this side of the Master

    Any ideas what might have caused this? Who I should contact about it?


    Iwan Davies, Oct 1, 2004
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  2. You should probably contact your ISP to raise a fault... same happened to me
    (well, it reduced a bit but didn't halve) when I went to 1MB in December
    last year. Luckily I already had a fairly high SNR at around 35+, so a
    little reduction wasn't problematic. Possibly due to the change in line

    Bare in mind though that they *may* put you back to 512 if your line can't
    properly support 1MB.
    James Hurrell, Oct 1, 2004
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  3. May well also be worth checking your filters... it isn't unheard of them to
    fail overnight.
    James Hurrell, Oct 1, 2004
  4. Iwan Davies

    Iwan Davies Guest

    Cheers James

    I'm beginning to think it's an ISP problem - I'm with Bulldog... Grrrr.
    (that's an impression of me, not the bulldog).

    Iwan Davies, Oct 1, 2004
  5. Cheers James
    Hope you have some luck... Bulldog do seem to have had more than their fair
    share of problems lately.

    James Hurrell, Oct 1, 2004
  6. Iwan Davies

    Iwan Davies Guest

    Tell me about it. I really can't believe a service can go from being so
    good to so poor in such a quick space of time without there being other
    factors - incompetence or sabotage, who knows...

    Iwan Davies, Oct 1, 2004
  7. Iwan Davies

    Tom Buchanan Guest


    I had similar when I upgraded to 1mB, My Noise Margin reading used be in
    region 24 to 30dB, but now it is sitting about 18dB. So I suspect it is more
    to do with upgrade rather thanany filter problem

    Tom Buchanan
    Tom Buchanan, Oct 2, 2004
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