TEST METHOD FOR LINE EQUIPMENT PROVIDED WITH A DETACHING DETECTOR AND LINE EQUIPMENT FOR IMPLEMENTING THE SAME

摘要

The invention relates to methods for testing analog telephone line equipment, in particular for detecting failures of their on-hook / off-hook detection circuit (112). It consists in isolating (103) the equipment from the telephone line. line, to apply to it (108) the normal battery signal and to apply on a son (202) connecting the hybrid circuit (107) to the detection circuit (112) a test signal to reverse the polarity at the input of this detection circuit. In case of failure of this circuit, its output logic signal (Vs) remains stationary, which indicates this failure. By using a high repetition frequency test signal, it is also possible to test the operation of the ringing signal cutoff filter (312). It allows the usual equipment test relay (105) to be removed. / P