SUBSCRIBER LINE MEASUREMENT METHOD AND ITS EQUIPMENT

PROBLEM TO BE SOLVED: To reduce the hardware quantity of a measurement equipment by reducing a measurement time without ringing a subscriber terminal equipment in the case of measuring the subscriber line to confirm the normality of the subscriber line. SOLUTION: In order to confirm the normality of a subscriber line including a subscriber terminal equipment, when a composite impedance including a resistive component and a capacity component on a subscriber line is measured, in the case that charges stored in a capacitance Ctel of a subscriber terminal equipment connecting to the subscriber line are discharged or charges are charged to the capacitance by using a constant voltage source, the subscriber line is alternately terminated by a low impedance and a high impedance at a termination section 4 at a time interval shorter than an operation time of a bell of the subscriber terminal equipment.