I'm not able to connect in this way.
I turned my old router in only modem mode but it seem not to work.
On modem mode a lot of config option are not avalaible, but it seem not to comunicate at all.
Maybe i need a twisted cable?
Once you have the DG814 setup as a modem/bridge then configure all of your PPPoE/DSL information (username and password) on your DGL-4300 router and wa-la. DG814 is simply a modem with no NAT and no DHCP.