P2p network using virtual pbx system on personal computer

A computer based P2P communication system using a virtual repeating system and a method thereof are provided to install a virtual PBX system at one computer, to enable a user to use a communication service like a phone communication service or an image communication by using plural communication terminals, to freely use various multimedia services such as an MP3 player, a VOD, and a game, and to use the communication terminals as a mobility type disc by installing a large capacity hard disc or a flash memory at them. A computer based P2P communication system using a virtual repeating system comprises a virtual PBX system(300), a transceiver(400), communication terminals(500-505) and a server(200). The virtual PBX system(300) is installed and constructed at a personal computer connected to the internet(100). The transceiver(400) like a wireless AP(Access Point) is connected to the personal computer by using a LAN or a USB(Universal Serial Bus) port. The communication terminals(500) have unique identifiers. The server(200), having a fixed IP, can be connected via the internet anywhere.