APPARATUS FOR MATCHING LOCAL LINE IN ELECTRON TYPE EXCHANGE

摘要

A device for matching a local line of an electronic exchanger is provided to offer a path for transceiving a voice band signal between a subscriber and the exchanger by using a small signal transformer to improve quality of a voice path. A subs line holding unit(100) receives DC supplied through a tip line and a ring line by connecting to a subscriber line and holds a DC flow while keeping polarity. A ring detector(200) detects an incoming ring flowing in the ring line at the tip line. A voice path matcher(300) offsets a signal received from the subscriber line holding unit and an echo signal and outputs a voice signal, which is designed not to generate inductive noises for an AC signal, to an output terminal.