发明名称 MULTI-MEDIA NETWORK SERVICE SYSTEM WITH FREE COMMUNICATION FUNCTION
摘要 The present invention relates to a multimedia network service system including a toll-free call function providing a toll-free call route which can mutually form a toll-free call line between a caller terminal and a receiver terminal when a caller makes a toll-free call even if both the caller terminal and the receiver terminal have no application exclusive for a toll-free call. The system enables a toll-free call to be made even if both the caller terminal and the receiver terminal have no application exclusive for a toll-free call. The system comprises: a caller terminal and a receiver terminal, a multimedia network service server, a call service device, a first call route forming device, and a second call route forming device.
申请公布号 KR20150133621(A) 申请公布日期 2015.11.30
申请号 KR20140126219 申请日期 2014.09.22
申请人 OPENVACS CO., LTD.;JEOUNG, YOUNG MIN 发明人 JEOUNG, YOUNG MIN
分类号 H04W4/16;H04W4/24;H04W40/18;H04W88/18 主分类号 H04W4/16
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