METHOD FOR PERFORMING TEST OF ATM CELL BUS SWITCH BY INTERRUPT IN DSLAM(DIGITAL SUBSCRIBER LINE ACCESS MULTIPLEXER) DEVICE

摘要

PURPOSE: A method for performing a test of an asynchronous transfer mode(ATM) cell bus switch by an interrupt in a digital subscriber line access multiplexer(DSLAM) device is provided to carry out a loop-back test relating to a cubit which is an ATM cell switching device, so as to verify a capacity of the cubit and to quickly verify basic functions of a board and a system which mount the cubit. CONSTITUTION: An asynchronous transfer mode(ATM) cell bus switch initializes a cubit register. The ATM cell bus switch confirms whether a user enables the cubit. If the user disables the cubit, the ATM cell bus switch completes a test process. If the user enables the cubit, the ATM cell bus switch decides whether the user intends to use a test method by an interrupt. If so, the ATM cell bus switch enables an interrupt mask of a CPU used in a corresponding board. The ATM cell bus switch performs a loop-back test by the interrupt.