ADSL signal to noise ratio.

Purely out of curiosity what sort of figures would be expected from a
functioning UK ADSL line? I note that my router reports line attenuation
consistently at 54dB but the SNR fluctuates from 11 up to 20dB. Constructive
comments would be welcomed.
--
gee six jay en (E-Mail Removed)

Replace the words with the numbers to email me

Peter Crosland <(E-Mail Removed)> wrote:
> Purely out of curiosity what sort of figures would be expected from a
> functioning UK ADSL line? I note that my router reports line attenuation
> consistently at 54dB but the SNR fluctuates from 11 up to 20dB. Constructive
> comments would be welcomed.

As long as the SNR is positive, it's good.
I see attenuations of some 55-64db, and SNR of around 13db or so at most
times.

"Ian Stirling" <(E-Mail Removed)> wrote in message
news:nULqc.4909$(E-Mail Removed)
> Peter Crosland <(E-Mail Removed)> wrote:
>> Purely out of curiosity what sort of figures would be expected from a
>> functioning UK ADSL line? I note that my router reports line
>> attenuation consistently at 54dB but the SNR fluctuates from 11 up
>> to 20dB. Constructive comments would be welcomed.
>
> As long as the SNR is positive, it's good.
> I see attenuations of some 55-64db, and SNR of around 13db or so at
> most times.

My attenuation is usually 52 dB. S/N varies from 4.5 dB to 12 dB

--
Old Codger
e-mail use reply to field

What matters in politics is not what happens, but what you can make people
believe has happened. [Janet Daley 27/8/2003]

In an earlier contribution to this discussion,
Peter Crosland <(E-Mail Removed)> wrote:

> Purely out of curiosity what sort of figures would be expected from a
> functioning UK ADSL line? I note that my router reports line
> attenuation consistently at 54dB but the SNR fluctuates from 11 up to
> 20dB. Constructive comments would be welcomed.

My understanding is that the attenuation has to be better than 60db for BT
to install the 500k service (mine was 49db) and around 40db for a 1M or 2M
connection.
--
Cheers,
Tim
______
Please reply to newsgroup. Reply address is Black Hole!

Thanks for the answers neither of which answered the question posed! Could
someone who actually knows give an answer on the SBR only?

"Peter Crosland" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Purely out of curiosity what sort of figures would be expected from a
> functioning UK ADSL line? I note that my router reports line attenuation
> consistently at 54dB but the SNR fluctuates from 11 up to 20dB.
Constructive
> comments would be welcomed.
> --
> gee six jay en (E-Mail Removed)
>
> Replace the words with the numbers to email me
>
>


A couple of weeks ago I saw a connection that varied between 22db and 12db
(58db attenuation) when ever a particular set of halogen lights in the house
were turned on. It turned out the telephone cable ran in the ceiling an inch
or two from the transformer for the lights. Moving the transformer just a
foot away removed the interference and stabilised the SNR.

Jc.

Peter Crosland <(E-Mail Removed)> wrote:
> Thanks for the answers neither of which answered the question posed! Could
> someone who actually knows give an answer on the SBR only?

If signal is constant, noise must be varying, mustn't it.

On Wed, 19 May 2004 16:55:50 +0100, "Peter Crosland"
<(E-Mail Removed)> wrote:

>Purely out of curiosity what sort of figures would be expected from a
>functioning UK ADSL line? I note that my router reports line attenuation
>consistently at 54dB but the SNR fluctuates from 11 up to 20dB. Constructive
>comments would be welcomed.

I'm about a mile from the local exchange, Crook, County Durham.

SNR Margin: 26.5
Loop Att: 23.0

Using Nildram with no problems since October 2003. Nothing else to
tell really, it just works 24/7/365 and I download everything at
better than 55kBytes/sec. 20-30 GB/month.

Using DrayTek Vigor2600 ADSL router latest firmware 2.5.5_UK

--
ddm

The entity currently known as Dave Mason wrote:

> On Wed, 19 May 2004 16:55:50 +0100, "Peter Crosland"
> <(E-Mail Removed)> wrote:
>
>>Purely out of curiosity what sort of figures would be expected from a
>>functioning UK ADSL line? I note that my router reports line attenuation
>>consistently at 54dB but the SNR fluctuates from 11 up to 20dB. Constructive
>>comments would be welcomed.
>
> I'm about a mile from the local exchange, Crook, County Durham.
>
> SNR Margin: 26.5
> Loop Att: 23.0

I'm about 6km from my exchange, Cowley, Oxon (Alcatel DSLAM).

SNR MArgin: 19.7 downstream, 27.0 upstream
Line Att: 61.3 , 31.5
Data Rate 576kbps , 288kbps

--
There's a neon light ablaze

> >> Purely out of curiosity what sort of figures would be expected from a
> >> functioning UK ADSL line? I note that my router reports line
> >> attenuation consistently at 54dB but the SNR fluctuates from 11 up
> >> to 20dB. Constructive comments would be welcomed.
> >
> > As long as the SNR is positive, it's good.
> > I see attenuations of some 55-64db, and SNR of around 13db or so at
> > most times.
>
> My attenuation is usually 52 dB. S/N varies from 4.5 dB to 12 dB

I live about 200 yards from the exchange, hence I get an SNR of 45db and a
line attenuation of 12.5db.

To the original poster, if your connection works, why worry?