for ATT VOIP. It was either a linksys wireless router Phone adapter, or a dlink telephone adapter. The dlink TA, unfortunatly had to sit infront of my linksys router that I already had. I don't care much for Dlink products, and I decided that I would rather have a linksys. I have the new Linksys working, and I'm on the internet with it, This new router does support VPN passthrough, so hopefully it will work.