Speed resync when it rains?

Within a minute of rain starting, my sync speed falls. What is likely to be
going on? The line is fed from a pole in the street. The line has been
installed since the late 1970s. Advice please.....

Thanks, Ray

"Ray Pearson" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Within a minute of rain starting, my sync speed falls. What is likely to
> be
> going on? The line is fed from a pole in the street. The line has been
> installed since the late 1970s. Advice please.....
>
> Thanks, Ray


What colour is the dropwire that comes across from the pole? It may be the
insulation has started to break down on it.

Does the wire go through trees?

Any noise on the line?

> Within a minute of rain starting, my sync speed falls. What is likely to
> be
> going on? The line is fed from a pole in the street. The line has been
> installed since the late 1970s. Advice please.....

As it happens so quickly it is less likely to be in the
underground plant street cables, best guess would be the
junction box at the top of the pole.
If it isn't affecting voice you may have a problem getting
it fixed for free as a voice fault, so it now depends on
whether you have a good (or a shiddy premium rate call
centre in Bangalore) ISP.
You could try "My phone crackles on windy days"
and as it hasn't had a recorded drop wire change
from the 70's they will probably take your word for it.
Grab the engineer and say your BB is also affected
and to give the joints a good scrape. to remove any
oxide, dry joint potential.
Also record your routers control panel attenuation,
SNR and sync rate, before/after, and when it rains.

Ray Pearson wrote:
> Within a minute of rain starting, my sync speed falls. What is likely to be
> going on? The line is fed from a pole in the street. The line has been
> installed since the late 1970s. Advice please.....
>
> Thanks, Ray
>
>
>
>
One of the endearing features of ADSL MAX is the number of things that
can cause a resynch.

Basically its set up to run on the bleeding edge of what the line can
stand, using some of the most sophisticated analogue and digital
technology created by man.

My question has always been "how come it stays up for so long without
resynching?"


since just about anythng from lightning, through an motorbike going
past, to my wife turning on an old fan, seems to affect the noise level.

> You could try "My phone crackles on windy days"
> and as it hasn't had a recorded drop wire change
> from the 70's they will probably take your word for it.

If you do get an engineer to replace the drop wire,
a cup of Typhoo, and 3 chocolate digestives is
the going rate for an NTE5.

"The Natural Philosopher"
> Basically its set up to run on the bleeding edge of what the line can
> stand, using some of the most sophisticated analogue and digital
> technology created by man.
>

Not any more ! BT has tweaked the DLM to settle for stability rather then
speed.
My ADSL used to run happily down to 2bB SNR, now I am stuck at min 12dB and
half the previous 2.8Mb/s !
Not a happy bunny, even got mobile BB, but it's no better, not yet
anyway....,
but one of these days I will be saying bye bye to BT line and ADSL !
Regards,
Martin

"Martin²" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>
> "The Natural Philosopher"
>> Basically its set up to run on the bleeding edge of what the line can
>> stand, using some of the most sophisticated analogue and digital
>> technology created by man.
>>
>
> Not any more ! BT has tweaked the DLM to settle for stability rather then
> speed.
> My ADSL used to run happily down to 2bB SNR, now I am stuck at min 12dB
> and half the previous 2.8Mb/s !
> Not a happy bunny, even got mobile BB, but it's no better, not yet
> anyway....,

I'm in the same boat.
I made the mistake of complaining to my ISP when my speed suddenly dropped
after four years of being at an average 2.5 Meg, down to about 1.5 Meg.
BT did excatly the same in my case - adjusted the equipment for stability
rather than speed.
I now get a "stable" - ie. slightly fewer drop-outs - connection at 1 Meg or
below, with no chance of anything better in future.

George

George Weston wrote:
> "Martin²" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> "The Natural Philosopher"
>>> Basically its set up to run on the bleeding edge of what the line can
>>> stand, using some of the most sophisticated analogue and digital
>>> technology created by man.
>>>
>> Not any more ! BT has tweaked the DLM to settle for stability rather then
>> speed.
>> My ADSL used to run happily down to 2bB SNR, now I am stuck at min 12dB
>> and half the previous 2.8Mb/s !
>> Not a happy bunny, even got mobile BB, but it's no better, not yet
>> anyway....,
>
> I'm in the same boat.
> I made the mistake of complaining to my ISP when my speed suddenly dropped
> after four years of being at an average 2.5 Meg, down to about 1.5 Meg.
> BT did excatly the same in my case - adjusted the equipment for stability
> rather than speed.
> I now get a "stable" - ie. slightly fewer drop-outs - connection at 1 Meg or
> below, with no chance of anything better in future.
>
> George
>
>
Ring up ISP and ay you ant the noise margin reduce to 9db or 6db.

(E-Mail Removed) wrote:
>> I'm in the same boat.
>> I made the mistake of complaining to my ISP when my speed suddenly dropped
>>
>> after four years of being at an average 2.5 Meg, down to about 1.5 Meg.
>> BT did excatly the same in my case - adjusted the equipment for stability
>> rather than speed.
>> I now get a "stable" - ie. slightly fewer drop-outs - connection at 1 Meg
>> or
>> below, with no chance of anything better in future.
>
> Which is just the point I made, ADSL needs to be rate adaptive, or
> allow the customer to adjust the SNR threshold, possibly with a
> minimum threshold, say 4db. If the customer sets it too low and
> he screws up his own connection, then it's his own fault.
> Seems to me that BT is setting an unreasonably conservative
> SNR of around 12db, when many modems will hold sync down
> to 2db.
> db is a logarithmic scale, if your modem holds sync at 2db, it
> should be quite happy with a 4db SNR ratio, and certainly doesn't
> need 12db.
> So you get the occasional burst ot transient noise, I'm quite
> happy if my sync speed drops to dialup speed, so long as it
> goes back up again as soon as the noise burst ends.
> If there is continuous noise on the line then it needs to be fixed.

Bt auto adjusts the noise margin according to disconnect rate. The
customer CAN in theory beat this by doing things at the router end.
I ended up with a 15dB moise margin at BT;'s end, but still connecting
way too fast for stability. Typically around 1-2dB SNR shown.

When I foud the magic turbo switch in the router and turned it off, I
got stability and a crap rate: I am now (at my behest) donwn to a 9db
rate, and have a resaonable compromise between speed and stability.

BT does what it does to optimize support calls. More people complain
more loudly if their connection is behaving like an Essex girls
knickers, than if it's just a tad slow.

"The Natural Philosopher" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> (E-Mail Removed) wrote:
Snip
>> If there is continuous noise on the line then it needs to be fixed.
>
> Bt auto adjusts the noise margin according to disconnect rate. The
> customer CAN in theory beat this by doing things at the router end.
> I ended up with a 15dB moise margin at BT;'s end, but still connecting way
> too fast for stability. Typically around 1-2dB SNR shown.
>
> When I foud the magic turbo switch in the router and turned it off, I got
> stability and a crap rate: I am now (at my behest) donwn to a 9db rate,
> and have a resaonable compromise between speed and stability.
>
> BT does what it does to optimize support calls. More people complain more
> loudly if their connection is behaving like an Essex girls knickers, than
> if it's just a tad slow.
>
>
That magic turbo switch in MY router "Young Man" is modded firmware (DGTeam
Rev. 0743) for some netgear routers (Mine is the DG834PN)

Now get your hands out your pockets!