Abstract: An Internet Protocol telephony exchange system and a call control method thereof. The exchange system integrates an IP terminal and a legacy terminal in a single exchange system, controls a call of the IP terminal in the same manner as an extension subscriber, and contains at least one IP terminal connected to the IP network. The IP terminal contains a user interface for generating user information or converting received user interface information into information of a user-identifiable state, and performs a VoIP function in compliance with one or more of a H.323, a MGCP and an SIP protocol procedure. The IP network is connected to an IP driver and an IP-PBX (Internet Protocol-Private Branch Exchange). The IP driver controls an IP end point at which the IP terminals are positioned, upon receiving IP terminal connection information and call control information based on H.323/MGCP/SIP protocol procedure.

Abstract: A method for interconnecting wired and wireless phone services of a system for interconnecting wired and wireless phone services includes: registering at least one of wire terminals and public/private mobile communication terminals as extension subscribers and endowing the extension subscribers with each of wired phone numbers; and in the case that an arbitrary wired phone number is called, making a call to the wired terminal corresponding to the wired phone number, and in the case that there is the public/private mobile communication terminal to be simultaneously called with the wired phone number interconnectively, making a call to the corresponding public/private mobile communication terminal through a mobile communication network. Therefore, a general wired subscriber is provided with the wired phone service and a service of portability through the wireless terminal, and a subscriber's billing burden can be reduced.

Abstract: An Internet Protocol telephony exchange system and a call control method thereof. The exchange system integrates an IP terminal and a legacy terminal in a single exchange system, controls a call of the IP terminal in the same manner as an extension subscriber, and contains at least one IP terminal connected to the IP network. The IP terminal contains a user interface for generating user information or converting received user interface information into information of a user-identifiable state, and performs a VoIP function in compliance with one or more of a H.323, a MGCP and an SIP protocol procedure. The IP network is connected to an IP driver and an IP-PBX (Internet Protocol-Private Branch Exchange). The IP driver controls an IP end point at which the IP terminals are positioned, upon receiving IP terminal connection information and call control information based on H.323/MGCP/SIP protocol procedure.