So I decided it was finally time to get rid of the constantly disconnecting Telecom provided wireless modem/router and get a proper solution. Based on posts here and elsewhere I purchased a TP-Link 8840 and ASUS RT-N16.

Getting the modem to connect out to the internet was easy, getting the router to provide stable wireless was even easier. However, for the life of me I can't get the modem to pass the WAN connection to the router.

So here's what I understand:
As my ADSL is PPPoA I will need to run the modem in half-bridge mode (IP Extension in its settings). I should be disabling DHCP on the modem (can't find where though). As both devices want to use 192.168.1.1, I'll need to change one or both of these.

Basically, I'm wondering if there's a guide somewhere for getting this all working, I've looked around but PPPoA half-bridging is fairly uncommon I've been coming up blank. I think if I can get to a point where I know that one device is all correct then I can get there, but right now I'm unsure if I've got that far.