3 - 24 Chapter 3Chapter 3 - Installing Extensions and TrunksSECTION 3-14TROUBLESHOOTING3.14.1 Basic Troubleshooting3.14.1.1 Troubleshooting Digital ExtensionsFigure 3-14: Digital Extension TroubleshootingStartVerify the ESIU bladeis functioning.Is the LiveStatus LED onthe ESIU bladeflashing green?Verify whether a digitalkeyset works.Connect a testterminal to a portusing anothermodular jack. Doesthe terminal work?Redo the wires betweenthe main equipment andthe modular jack.Verify the wiringbetween the chassisand the keyset.Connect the terminaldirectly to theconnector on theESIU. Does it work?Redo the wires betweenthe main equipment andthe terminal.The terminal mayneed repair.YesNoNoYesYes* If it still does not work,replace the cable(s) and/or connectors.Connect anotherterminal to thesame port on theESIU. Does it work?The ESIU blade mayneed repair.* If it still does not work,replace the cable(s) and/or connectors.YesNoCheck systemprogramming for theextension. Refer tothe UX5000 SoftwareManual if necessary.Connect the terminal directly tothe connector on the ESIU.Does it work?NoStopYesRemove the blade andinsert another ESIUblade into the same slot.Does it work?The ESIU blade mayneed repair.Main equipment(chassis/CCPU) mayneed repair.YesNoIs the LiveStatus LED solidgreen, flashingor off?Main equipment(chassis/CCPU) mayneed repair.OnFlashingIn Program 90-05, release theBlock on the blade andrecheck the terminal operation.OffNoVerify the connectionto the EXIFU if twochassis are used.If the Busy LED (red) is alsoon, the blade is initializing. Waituntil LED status changes and recheck.Does the terminalwork?NoStopYes
