I'm trying a new tack. I've disconnected everything from the point in the lounge including the line to the computer. Then I ran the line all the way into the bedroom phone connection. So as of 6.10pm I'm online. If this works then it's the point that's gone and it'll stay gone until I can afford the excessive Telstra call out fee.
There will be no betting on how soon I will trip over the phone line running through the house.
Memo to self - lift your bloody feet.