Apparatus for testing ATM channels

摘要

A first form of an ATM channel testing apparatus tests an ATM channel by having a test cell detector (307) in each switch (306) detect whether or not the switch appropriately switches a test cell (303) generated by a test cell generating trunk (302). A second form of an ATM channel testing apparatus easily tests an ATM channel by having test cell generators (404) provided for the respective input highways (402) sequentially generate test cells to which test cell identifying information and input highway identifying information and having test cell monitor (405) provided for the respective output highways (403) simply tally the test cells by the respective input highways. A third form of an ATM channel testing apparatus tests an ATM channel with less pieces of hardware by having turnaround parts (507) in respective ordinary trunks (501) sequentially turn around a test cell (504) generated by a test cell generating trunk (503) to be finally returned to the test cell generating trunk.