I have DSL service through Frontier. Cable is not an option where I live. I have a combination modem/wifi router that Frontier has given to me. I want to add hard wired service and wifi service do another room in my house. That room already has an RJ-11 jack and a DSL filter plugged into it. Can I connect anything to the RJ-11 to add DSL service to another room? Or is running CAT-5 ethernet my best option?