COMMUNICATION SERVER

A communication server at least includes a processing unit; a radio frequency (RF) unit connected to the processing unit; a network address conversion unit connected to the processing unit; a connection unit connected to the processing unit; and a display unit connected to the processing unit. It can be connected to the Internet network, the household phone, the mobile phone and the Internet phone for the use of communication so that a plurality of users can share the same communication server without any need of other communication equipments, thus achieving purposes of being easy to install, reduced set-up costs, enhanced communication efficiency, lowered call costs and reduce in the waste of resources.