My family has a dsl modem router in the master bedroom. And whenever someone would casually open the door to the bathroom there, the wireless connection would drop for like 25 seconds, before being okay again. It's a bit frustrating when gaming or chatting.
I tried moving the modem to my room to see if anything would change(although the phone cord was still attached to the phone jack in the master bedroom). So yeah, the same thing happens when I'm wired directly.
Sorry if this is the wrong place to post this.