However, in order to tidy my network layout up a bit, I shifted it to a phone jack at the other end of the house. It gets a dsl connection (and at a higher sync rate than the previous jack), but after around 30 seconds it disconnects. Thinking it might be a dud jack, I plugged in the old speedtouch, which worked perfectly. When I plugged the AM300 into the first jack (taking everything back to how it was before I started), the dsl connection continued to drop.
So that's where I am, now, the AM300 can't maintain a dsl connection (and I've tried different cables, filters, resetting to factory etc), while the speedtouch works just fine (albeit at a 0.8mbit lower sync speed) on both jacks. I'm at a loss as to what I can try, any ideas?
Oh, and the AM300 doesn't keep a log of anything other than inbound/outbound connections, so no luck checking there to see what's happening.