I agree, use a lag switch for this. I first started making lag switches on PS2, Socom 3 =) They do work with LAN, Cable, and Dial-UP (Yes, a phone line!) It's fairly simple too, just need a switch of some sort. I know people use power-switches that you buy for computers, but I use a light switch. I also tried with a lamp-dim-switch, it worked awesome =)
I tried a lag switch with this, and it works. So no one can say it doesn't.