SNR Margin has halved - possible causes?

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
Socket.

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

Cheers

Iwan

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

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
card.

Bare in mind though that they *may* put you back to 512 if your line can't
properly support 1MB.

May well also be worth checking your filters... it isn't unheard of them to
fail overnight.

On Fri, 1 Oct 2004 16:02:02 +0100, James Hurrell wrote:

> May well also be worth checking your filters... it isn't unheard of them to
> fail overnight.

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

> 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

Hope you have some luck... Bulldog do seem to have had more than their fair
share of problems lately.

James

On Fri, 1 Oct 2004 16:53:10 +0100, James Hurrell wrote:

>> 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
>
> Hope you have some luck... Bulldog do seem to have had more than their fair
> share of problems lately.
>
> James

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

"Iwan Davies" <NOSPAM-(E-Mail Removed)> wrote in message
news:1tmjnuoqxsjyo$.1s7nfi8h3i455$.(E-Mail Removed). ..
> 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
> Socket.
>
> Any ideas what might have caused this? Who I should contact about it?
>
> Cheers
>
> Iwan

Iwan,

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