TELECOM 247

> HI,
>
> I have an ADSL line with BT. Were about 3 miles from the exchange,
> in a fairly remote house out in the country.
>
> Ive recently gone from a 512Kbps service to an up to 8Mb and
> after the initial test fortnight got a princely speed increase
> to... 576kbps.
>
> Ive changed the old Belkin modem for a Netgear DG834 which is
> supposed to be good with noisy lines, and incidentally allows me to
> monitor the line noise stats.
>
> After watching it for a week or so, its obvious that the noise
> margin is cyclic and much worse during the hours of darkness: I get
> around 14dB margin +/- 2dB between 7:00 and about 15:30 then it
> drops off to 4dB +/-6dB(!) for the rest of the time.
>
> I know about extra noise during daylight hours due to the sun
> heating things up, but I hadnt come across this one.
>
> Any ideas on the cause, and even better a solution?
>
> In any case, this line is mainly for business use during daylight,
> but the abysmal nighttime noise levels have led to the 576kbps
> speed limit - can anything be done to get this increased so I can
> get a decent speed during the day (steady 12-14dB margin) but
> accept lots of dropouts at night(-2-10dB margin)?