A:AnswerThe Netgear R8000P X6S AC4000 Router should work with almost any ISP-provided router, including FiOs. The Netgear plugs into a wired port on your existing ISP router. You turn off the ISP router WiFi and move all wired devices from the ISP router to the Netgear router. Set up the same WiFi SSID(s) on the Netgear router and you should be back in business.
A:AnswerI can’t speak for the basic internet provided from CenturyLink but I have fiber optic GB service with them and it works fine. Typically routers are agnostic and can work with any modem.
A:AnswerYou can definitely set up at least one Guest account with this router. I would have to go back through the instructions to verify whether more than on Guest accounts are possible. Setting up one was relatively simple.
A:AnswerYou connect to the LAN and use your laptop/desktop to configure by connecting to Netgear's address. You will need to reboot your COX router but Netgear's instructions guide you step by step what to do. I did have to poweroff and power on my router a couple of times but if worked after the second try.