A PATH EXPANSION APPARATUS FOR MOST HAVING ERROR SENSING FUNCTION

摘要

The present invention relates to a last path expansion device having an abnormal diagnosis function, and more particularly, to input a ring diagnostic signal (AlBD, RBD: Ring Break Diagnosis) to check the state of a transmission line. The present invention relates to a last path expansion device having an abnormal diagnosis function for checking a state. The present invention adds an ALDI (ring abnormality diagnosis check) signal input function to an existing most recent path expansion device without performing such a separate configuration and operation of cable transmission. As a result, it is possible to realize the steady state and abnormal occurrence state in the most by the AV signal input, and to make it possible to test the convenience of use.;Most Path Expander, Ring Break Diagnosis (RBD)