VoIP GATEWAY DEVICE CONTROL METHOD THEREOF AND VoIP GATEWAY SYSTEM

摘要

The present invention relates to a VoIP gateway device capable of a call back service, a control method thereof, and a system including the VoIP gateway device. A VoIP gateway apparatus according to the present invention comprises: a connection unit for communicating with a first terminal; A communication unit for communicating with a proxy server relaying VoIP communication; A storage unit for storing an incoming ring tone corresponding to a call received by the callback function; When a callback function is requested from the first terminal, the first terminal transmits, to the proxy server, an invite message for a call connection with a second terminal to which the first terminal device intends to make a call connection, And a controller for receiving the ringing message from the proxy server and transmitting the stored ringing tone to the first terminal.;