Chapter 3 - Installing Extensions and TrunksChapter 3 3 - 273.14.1.4 Troubleshooting ISDN LinesFigure 3-17: BRI Line TroubleshootingStartVerify the BRIU bladeis functioning.Is the Live StatusLED on the BRIUblade flashing green?Remove the blade andinsert another BRIUblade into the same slot.Does it work?Verify wiring betweenmain equipment andCO line and betweenthe two UX5000chassis (if installed).The BRIU blade mayneed repair.Main equipment(chassis/CCPU) mayneed repair.Is the cablewiring correct?DSU may need repair.Insert another BRIU bladeinto the same slot in theCCPU. Does it work?T-Point portion of the externalDSU may need repair.The BRIU blademay need repair.YesYesNoYesNoYesNoThe main equipment(chassis/CCPU) mayneed repair.* If it still does not work,replace the cable(s) and/or connectors.YesNoIs the ISDN Layer1link established(LD2, LD3 flashing)on the BRIU blade?NoRedo the wirescorrectly.NoRequest the COperform aloopback test ofthe DSU. Anyproblems found?YesIf an external DSU isused, connect theISDN terminal to theT-Point. Is it possibleto make a call?NoYesCheck system programmingfor the extension. Refer to theUX5000 Software Manual ifnecessary. Is it possible tomake a call?NoStopYesRelease the Blockin Program 90--05(enter 4) for the bladeand recheck operation.
