wrote:
Well, one i've not heard of before anyways.....

Friends in the next village (Broadbridge heath, West Sussex) have a
Dell PC conncted to orange broadband via the USB ADSL modem supplied
by Orange.

For about a week now they have been unable to use the connection
except when they are using the phone for a voice call.

They have tried :

Plugging the modem directly into the master socket (well, via a
filter) with all other exts unplugged.

Trying 3 different micofilters.

Spendijng ages on the phone to Orange Broadband at some extortionate
cost checking and re-checking settings.

Getting BT to check the line (supposedly ok).

Anyone seen this before and know what the problem is?

How about trying another known working USB ADSL modem?