A New Type of Dialing Supervisor

HUANG Yu-hang, LIU Min-jian, HE Guo-ying. A New Type of Dialing SupervisorJ. Journal of Mine Automation, 2002, 28(4): 30-32.

Citation:

HUANG Yu-hang, LIU Min-jian, HE Guo-ying. A New Type of Dialing SupervisorJ. Journal of Mine Automation, 2002, 28(4): 30-32.

Citation:

HUANG Yu-hang, LIU Min-jian, HE Guo-ying. A New Type of Dialing SupervisorJ. Journal of Mine Automation, 2002, 28(4): 30-32.

Abstract

The paper mainly introduced the designing scheme and operating principle of a kind of dialing supervisor connected between the city telephone lines and the telephone sets.

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