I am sorry to hear that you are unable to connect. Please visit this link to check the server status: Call of Duty®: Ghosts || Game Status. Please notice that the status is at Defcon 4, please continue check back.
i havint been able to connect to the ghost server since the first of december. this is bull since i bought the xbox one and ghosts so i can play online. but now im just wasting my xbox live on waiting for the servers to come back online. at least the netflix still works on it i guess.