After two weeks holiday during which I turned off my Lynksys router I have returned to a problem.
I have spent all day eliminating things.
I keep losing my ethernet connection (XP) and get 'network cable is unplugged' message. The wireless laptop that I use also loses connectivity at this point and the router reboots a couple of times. It then lasts for about five minutes or five seconds before bombing again.
Running both my PC and laptop wirelessly works fine I think. It seems to be just when I plug the PC in via the ethernet connection it throws an intermittent wobble.
Pipex say that it isn't them as my isp.
BT say the line is fine albeit a bit crackly.
I've uninstalled and reinstalled the ethernet driver.
I've reinstalled the router settings from scratch.
Lynksys say that the router is fine.
I've changed the microfilters and checked the BT boxes as best I can.
I suppose that I could just run them both wirelessly but I would like to sort if possible.
I think that Ikelos is on the right lines especially as BT says that the line is a bit crackly and the router keeps dropping out but it may not be the cable between the BT box and the router. Try to get BT to do a proper check for you but also go round and check all your phone filters. My money now is on the incoming line.