PPPoA is the way the adsl signal gets to your modem. From your modem it is an ethernet signal. You wouldn't expect your router to support PPPoA because it will never see it.
If your router has an uplink port, you may need a cross-over ethernet cable to connect it to the Belkin unless your router has auto-sensing ports.
A static IP address is irrelevant if you mean your internet (WAN) IP address. If your router has a static address you may have to change it.