发明授权
US3697700A Line hunting circuitry for common control communications switching system
失效
用于通用控制通信切换系统的线路巡检电路
- 专利标题： Line hunting circuitry for common control communications switching system
- 专利标题（中）： 用于通用控制通信切换系统的线路巡检电路
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申请号： US3697700D申请日： 1970-12-21
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公开(公告)号： US3697700A公开(公告)日： 1972-10-10
- 发明人: GREASON WILLIAM WALLACE , WEINER DAVID WILLIAM
- 申请人： BELL TELEPHONE LABOR INC
- 专利权人： Nokia Bell Labs
- 当前专利权人： Nokia Bell Labs
- 优先权： US10031570 1970-12-21
- 主分类号： H04Q3/54
- IPC分类号： H04Q3/54 ; H04Q3/22
摘要：
A telephone system suitable for use as a private branch exchange with 40 station and attendant lines or less is disclosed. It comprises a crossbar switching network that establishes call connections for station lines, registers and trunks under common control. PBX line hunting circuitry is integrated into the electromechanical switching network with electronic hunting gate arrangements in a group of station line circuits.