I have a WHR-HP-G54 which I have used for over a year as a router connected to an AT&T DSL modem. This setup worked almost out of the box with few setup issues. However, I recently changed over to a cable modem (actually a modem/voice adapter) and the G54 router refuses to connect to the new modem. It is setup to DCHP on the WAN port (same as the router used for typing this). The Buffalo router appears to go through the motions of connecting to the modem but never completes the process. This is monitored by a computer logged into the router.