I believe there are routers out there with built in cable modems. I have the Linksys router which you just plug the cable modem provided by my ISP into the router and thats it. (Two things, router and modem.) I also suggest having them seperate because like me, I had a power surge come down the cable line, fry my cable modem but it didn't touch the router. If the router and cable would have been one unit them I would have been screwed. Hope this helps!