发明名称 Subscriber equipment muting method and apparatus
摘要 An apparatus for muting communications subscriber equipment connected to a communications line includes a monitoring circuit for monitoring electrical conditions of the communications line, when the subscriber equipment is connected thereto. A disconnection circuit is provided for disconnecting the subscriber equipment from the communication line and a termination circuit is provided for terminating the communications line with a dummy termination when the subscriber equipment is disconnected, such that, the communications line appears to be terminated by the subscriber equipment. When the subscriber equipment is disconnected from the communications line a power supply circuit provides power to the subscriber equipment with the same electrical conditions as determined by the monitoring circuit prior to disconnecting the subscriber equipment.
申请公布号 US5805687(A) 申请公布日期 1998.09.08
申请号 US19960723321 申请日期 1996.09.30
申请人 NORTHERN TELECOM LIMITED 发明人 WESTERGAARD, DAVID JEFFREY;BOBICK, AARON JAMES
分类号 H04M1/64;H04M3/20;H04M3/22;(IPC1-7):H04M1/64 主分类号 H04M1/64
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