Patent ID: 7843950

Claim:
A service provider system establishing an audio/video communication between a user system which is accessed for an audio/video communication in a state where a user identifier DN for identifying the user system from another user system for the purpose of the audio/video communication is not given to the user system and a system including an IP-based telephone exchanger taking charge of a telephone exchange between Internet phones and a plurality of phones connected to the IP-based telephone exchanger, the service provider system comprising: a web server providing the user system with a phone icon or button indicating a call receiver and transmitting a phone identifier LN for identifying the receiver allocated to the phone button when a user clicks the icon or button; and a gateway module performing a call setup in response to a data connection request for the audio/video communication from the user system, specifying the user identifier DN for identifying the user system from another user system, transmitting the phone identifier LN to the IP-based telephone exchanger, and relaying a communication between a phone connected to the IP-based telephone exchanger and the user system to progress the audio/video communication.