Since I change my DIR-655 to DIR-685 I experienced problems with my wired devices. My ATA can't "talk" with router, for example. And no, isn't the DHCP bug. To depart any phisical cause I return with my old DIR-655 and use same RJ45 cables, same modem, local, etc... result: all my wired devices works perfectly. So, now, D-Link, is up to you.