发明名称 Voice over IP portable transreceiver
摘要 A portable transreceiver system transmitting voice communications over a data network is described. The system has a portable transreceiver (WT) mode where multiple users are connected using semi duplex communications, and a private mode in which pairs of users are connected using full duplex communications. Wireless voice enabled terminals are used by the users, and are interconnected via a network such as the Internet.
申请公布号 US7023821(B2) 申请公布日期 2006.04.04
申请号 US20030338938 申请日期 2003.01.08
申请人 SYMNBOL TECHNOLOGIES, INC. 发明人 WOTHERSPOON KENT;CALLOW GERALD
分类号 H04L12/28;H04L29/06;H04M1/253;H04M1/57;H04M1/725;H04W4/10;H04W80/00;H04W84/08;H04W84/12 主分类号 H04L12/28
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