A telephone plug is a plug which allows a telephone to connect to the local telephone network. It plugs into a socket or jack fixe to the wall or baseboard. The standard for telephone plugs varies from country to country though the RJ11 has become by far the most common. Other types resembling the Registered jack series, used for Ethernet connectors, cause confusion when users don't know the difference. Such jacks are also seen on the body of phones.