CenturyLink was to replace my Cox Internet and not my phone. I was going to go with a VoIP. CenturyLink used my CAT3 original wiring at first then they tried a CAT5 wire, which I installed. Neither gave me the internet speed I wanted. I never stopped my Cox Internet or Phone service during this installation. My present concern is that the NID box is virtually doing nothing any longer whereas before CenturyLink my CAT3 lines were connected to the connection block by the RED and GREEN wires. I just feel CenturyLink mickey moused the entire system. Since everything is working, I will count myself lucky at this point. If I ever drop Cox, I am sure the new provider will have to make it right.