I had my Mac and a PC both hard wired into an older linksys router and everything worked fine. I recently got VOIP and a new linksys WRT54GP2A-AT router that supports VOIP. I connected both the PC and Mac to the new router and both connected to the internet. However after a short time the internet connection was lost and I needed to reboot the router. Through trial and error I discovered the problem was with the Mac. If I disconnect the Mac from the router, the internet connection remains up all the time. The minute I connect the mac, the mac connects to the net but soon afterwards the whole connection goes. I called Linksys and all they told me was to try a new cable. The cable was OK for the old linksys router, why would it not work with any other router? Does anyone have one of these routers and if so are you having the same problems? Can anyone think of any router settings that would effect only the Mac with these problems but not the pc's. I had Panther and was hoping when I upgraded to Tiger the problem would stop, but it didn't.