ADTRAN DSU 5600 User Manual

61200.078L1-1 DSU 5600 User Manual 3Chapter 1. IntroductionTest Status/Error (Yellow/Red)DTE On indicates DTE interface test in progress.Flashing indicates loop interface test (CSU Loopback)has been initiated by the telco.Loop On solid indicates loop interface test has beeninitiated from local DSU.Flashing indicates loop interface test (CSU or DSULoopback) has been initiated by the telco.RDL On solid indicates remote digital loopback test hasbeen initiated from the local DSU.Flashing indicates remote digital loopback test hasbeen initiated from the remote DSU.PTRN On indicates integral pattern generator is beingutilized for testing.Error On solid indicates remote digital loopback test hasbeen initiated from the local DSU.Flashing indicates remote digital loopback test hasbeen initiated from the remote DSU.For more information on the tests indicated by the indicatorsdescribed previously see the chapter Test Modes.Select and Test ButtonsThe front panel also contains two push-button switches forselecting and controlling the various test modes for the DSU5600.Select Each time this switch is pressed the current testmode is displayed by turning On one or more LEDsto indicate the specific test.Test Once the desired test mode is displayed on the teststatus indicators, the test is initiated by activatingthis switch. This switch is also activated to termi-nate any test in progress.