What SNR fluctuation is normal?

I have a recently-enabled ADSL max. line which the BT number checker
originally told me might support up to 2.5mb.

At first, it did run at up to about 1.6mb but now after a few weeks it
has settled at a constant 0.7mb. The Line Attenuation according to my
Draytek router is 58.5db.

I have been monitoring the SNR over the past 48 hours and am seeing wild
fluctuations, despite the fact that the speed and attenuation figures
have not changed in that time. For about half the time the SNR reads an
average 14.5db, +/-1db, in blocks of several hours. For the other half
of the time the SNR fluctuates wildly, almost by the minute, within the
range 5-13db. The good periods have occurred at different times on each
of the two days monitored and I can rule out any electrical interference
from my property.

Is this behaviour normal? Assuming it isn't and the fault is not with
my own internal wiring, is this a fault which my ISP/BT will do anything
about?

Thanks
--
Kevin

Kevin Vivian wrote:
> I have a recently-enabled ADSL max. line which the BT number checker
> originally told me might support up to 2.5mb.
>
> At first, it did run at up to about 1.6mb but now after a few weeks
> it has settled at a constant 0.7mb. The Line Attenuation according
> to my Draytek router is 58.5db.
>
> I have been monitoring the SNR over the past 48 hours and am seeing
> wild fluctuations, despite the fact that the speed and attenuation
> figures have not changed in that time. For about half the time the
> SNR reads an average 14.5db, +/-1db, in blocks of several hours.
> For the other half of the time the SNR fluctuates wildly, almost by
> the minute, within the range 5-13db. The good periods have
> occurred at different times on each of the two days monitored and I
> can rule out any electrical interference from my property.
>
> Is this behaviour normal? Assuming it isn't and the fault is not
> with my own internal wiring, is this a fault which my ISP/BT will
> do anything about?
>
> Thanks

There is normally a fluctation between day & night time (possibly made
worse by extension wiring), but during the day it's not normal at
all...

As for Openreach doing something about it, it all depends on what is
causing, a line fault yes, possible external interferrence yes but
other than that I very much doubt it...

Before you waste to much time go to

http://www.dslzoneuk.net/forum/viewforum.php?f=24

And click on "improve your speed"

Removing the unwanted wires removed my interference and gave me a stable
connection.

Alec


"kraftee" <Kraftee@b&e-cottee.me.uk> wrote in message
news:wJOdnZY-(E-Mail Removed)...
> Kevin Vivian wrote:
>> I have a recently-enabled ADSL max. line which the BT number checker
>> originally told me might support up to 2.5mb.
>>
>> At first, it did run at up to about 1.6mb but now after a few weeks
>> it has settled at a constant 0.7mb. The Line Attenuation according
>> to my Draytek router is 58.5db.
>>
>> I have been monitoring the SNR over the past 48 hours and am seeing
>> wild fluctuations, despite the fact that the speed and attenuation
>> figures have not changed in that time. For about half the time the
>> SNR reads an average 14.5db, +/-1db, in blocks of several hours.
>> For the other half of the time the SNR fluctuates wildly, almost by
>> the minute, within the range 5-13db. The good periods have
>> occurred at different times on each of the two days monitored and I
>> can rule out any electrical interference from my property.
>>
>> Is this behaviour normal? Assuming it isn't and the fault is not
>> with my own internal wiring, is this a fault which my ISP/BT will
>> do anything about?
>>
>> Thanks
>
> There is normally a fluctation between day & night time (possibly made
> worse by extension wiring), but during the day it's not normal at all...
>
> As for Openreach doing something about it, it all depends on what is
> causing, a line fault yes, possible external interferrence yes but other
> than that I very much doubt it...
>

In article <e8mdnaXj1vTS-(E-Mail Removed)>, Alec <alec@e-
hopley.fsnet.co.uk> writes
>Before you waste to much time go to
>
>http://www.dslzoneuk.net/forum/viewforum.php?f=24
>
>And click on "improve your speed"
>
>Removing the unwanted wires removed my interference and gave me a stable
>connection.
>
>Alec
>
>
Thanks, Alec.

Following the advice on the dslzoneuk site, I will plug in to the test
socket and see if that makes a difference.

Cheers
--
Kevin