Messages and Troubleshooting6-6 8774-A2-GB20-10December 1998Table 6-2. Troubleshooting (2 of 2)Symptom SolutionsPossible CauseNot receiving data. The network or DSX-1port cables are notconnected (check frontpanel LEDs for moreinformation). A test is being executed Check network and DSX-1 portcables. Check Health and Status menu. Run Loopback tests. Refer toChapter 5,Testing. A test is being executedon the unit (check theTEST LED on the frontpanel). The far-end device isoffline.Chapter 5,Testing. Stop the test or wait for the testto end. Make sure the far-end device ison.Power-Up Self-Testfails. Only AlarmLED is on afterpower-up.The 8774 Termination Unithas detected an internalhardware failure. Reset the 8774 Termination Unitand try again. Contact your servicerepresentative.