Re: Wildly varying DSL sync rate - affects IP profile

"Martin" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) o.uk...
> Does anyone have any suggestions as to what could be causing the following
> problem?
>
> My girlfriend's DSL connection has started experiencing very wide
> variations
> in DSL sync rate, after previously being fairly steady at about 2500 kbps.
>
> When the router is rebooted, it now initially syncs at around 3500-4500
> kbps. But sometimes, over the course of a few hours, the sync rate that
> the
> router reports drops drastically - maybe to 1500 kbps but on several
> occasions it's been as low as 160 kbps :-(
>
> Unfortunately if it stays at 160 kbps for too long before she notices, the
> exchange reduces the IP profile to a corresponding value (eg 135 kbps) and
> it then takes many hours for the profile to recover even after the router
> has been rebooted and is syncing at 3000 again.
>
> The router is a Netgear DG834PN. Its log file and connection status show
> that the connection hasn't dropped and reconnected at all as the sync rate
> falls.
>
> The symptom does not seem to be related to times when the phone rings or
> when it's used for incoming or outgoing calls. Nor is it related to use of
> the nearby microwave oven.
>
> Typical connection stats are:
>
> speed 4960 448 kbps
> atten 39.0 21.0 dB
> margin 14.9 19.0 dB
>
> speed 3648 448
> atten 39.0 21.0
> margin 10.6 20.0
>
> speed 1440 448
> atten 41.0 21.0
> margin 30.1 20.0
>
> speed 160 448
> atten 39.0 21.0
> margin 30.1 18.0
>
> So the attenuation varies slightly, but sometimes the speed drops to give
> a
> greater noise margin. However even at the highest speed, the noise margin
> is
> still well above the advised minimum margin of about 6 dB.
>
> The house has two phone sockets (both are labelled BT but neither is a
> two-part socket with removable faceplate and test socket inside). One
> socket
> is unused and has no filter, the other socket has a filter into which the
> router and a cordless phone's base station are plugged.
>
> As yet I've not been able to test with a different router, filter or DSL
> cable, though I will do this when I'm next there.
>
> I've tested using the other BT socket and with the phone unplugged from
> the
> filter, but the problem still exists.
>
You need to find the master socket and plug the router in to that to test.
It sounds like some cowboy has fitted those sockets, so you might need
to buy a master socket and fit it to the cable where it enters the house.
Remove the wires for the extension if they are not used.
Once that is done you can report the fault to the ISP if it still exists.

David Perry wrote:

> You need to find the master socket and plug the router in to that to test.

> It sounds like some cowboy has fitted those sockets, so you might need
> to buy a master socket and fit it to the cable where it enters the house.
> Remove the wires for the extension if they are not used.
> Once that is done you can report the fault to the ISP if it still exists.

Warning: David Perry WAS Roger, and still is as inadequate.

--
Adrian C