Invention Grant
US08842686B2 Communication system configured with an SIP functioned relay server and communication method using the same 有权
配置有SIP功能的中继服务器的通信系统和使用该功能的通信方法

Communication system configured with an SIP functioned relay server and communication method using the same
Abstract:
A communication system (1) has a relay server (S) assigned to a wide area IP network (net1) and having a SIP function, a transmitting terminal (C1) transmitting over the relay server (S), and a receiving terminal (C2) receiving over the relay server (S); the transmitting terminal (C1) and the receiving terminal (C2) have a first IP address (21A) for communicating over the wide area IP network (net1) and a second IP address (21B) for communicating over a short circuit (XD) in an Internet network using XMPP as a communication protocol; and the transmitting terminal (C1) switches to the short circuit (XD) and communicates after communication with the receiving terminal (C2) is established over the wide area IP network (net1).
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