PATH TESTING SYSTEM FOR ATM SWITCH

摘要

PURPOSE:To efficiently execute a test or an arbitrary path and tests to all cells by allocating the time of the idle cell to the test cell in the multistage self-routing part (MSSR) path test of asynchronous transfer mode (ATM) exchange. CONSTITUTION:A test cell inserting means 11 exchanges the idle cell to the data, which is not required to be inputted to the MSSR out of the data transferred on a transmission line, with the test cell including test data and the MSSR is finished through a multiplexer, for example. A test result deciding means 12 compares the test cell sent into the MSSR by the test cell inserting means 11 and returned through the test path with the test data inserted by the test cell inserting means 11, decides the quality of the test path and applies the result to a central control unit 13, for example, as information concerning maintenance. Thus, the test or the arbitrary path and the tests to all the paths can be efficiently executed.