Device for testing communications connection has interface enabling connection of test equipment, arrangement for activating loop in network terminating device of subscriber connection

摘要

The device is inserted at any point in the communications connection between the main exchange and subscriber connection and simulates a supplier side line termination. The device has a s0 interface enabling the connection of test equipment and an arrangement for activating a loop in the network terminating device of a subscriber connection. A signal coupling unit feeds a data signal to transducers for bi-directional data exchanges.