发明名称 Key telephone system with virtual private lines.
摘要 <p>A virtual private line key telephone system is provided. The system includes a console including a plurality of line keys each associated with a party that can be reached via a switched trunk line. A look-up table means associates the line keys with the telephone numbers of the associated parties. A communication path is established from the console to one of the trunk lines. Signals are sent to the central office via the selected trunk line corresponding to the telephone number in the look-up table means associated with a line key that is actuated to place a calls. The telephone number of incoming calls are determined and compared with telephone numbers in the look-up table. Thereafter the line keys which are associated with the incoming calls are determined. The incoming call is coupled to the console when a line key associated with the incoming caller is actuated.</p>
申请公布号 EP0534783(A2) 申请公布日期 1993.03.31
申请号 EP19920308766 申请日期 1992.09.25
申请人 IPC INFORMATION SYSTEMS, INC. 发明人 COTTON, JOHN M.;OLSEN, NEIL C.
分类号 H04M3/00;H04M1/57;H04M3/42;H04M7/00;H04M9/00;H04Q11/04 主分类号 H04M3/00
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