SYSTEM, A METHOD, AND A RECORDING MEDIUM FOR PROVIDING A VOIP SERVICE IN A FIREWALL ENVIRONMENT, ESPECIALLY CONCERNED WITH SUPPORTING INTERNET AUDIO/VIDEO COMMUNICATION, WITHOUT THE NECESSITY OF CHANGING THE SOFTWARE OF A USER TERMINAL, UNDER A FIREWALL/NAT ENVIRONMENT

摘要

Purpose a: system, method, and record media is provided to interactive VoIP services for providing VoIP services in a firewall environment under one of firewall/NAT (network address translation) environment, without necessity, it considers firewall/NAT environment, open multiple TCP port, or modification terminal. A kind of construction: system, for providing VoIP services in a firewall environment, including multiple terminals (100), one (200), one of firewall/NAT (300), a media relay servers (400), a VoIP doorkeeper (500) and a VoIP gateways (600). Each terminal (100) has a private IP address wherein the VoIP of a standard is mounted. Agent (200) management is attempted to register to use multiple terminals of VoIP and route signal and medium, is executed by VoIP, to the terminal under the management of own. Media relay servers (400) are located at a VoIP service provider networks, distribute the public addresses IP and Single port according to from the request of agent (200). Media relay servers (400) equally receive signal and medium, and the gateway and terminal from another network provide, and pass through the distribution IP address of own and port and relay them to agent (200). VoIP doorkeeper (500) and VoIP gateways (600) perform various functions, such as a subscriber management function, CDR (call detail record) creation function, etc., in addition to a VoIP translation functions and an interworking function with a PSTN.