ADTRAN 200410L1 User Manual

Contents

Chapter 2. Installation2-2 ESU LT User Manual 61200410L1-1Power ConnectionPower is supplied to the ESU LT through an IEC-type powerconnector on the rear of the unit.Power Up Testing and InitializationWhen shipped from the factory, the ESU LT is set to factorydefault conditions. At the first application of power, the unitautomatically executes self-tests followed by an initializatiosequence which sets up the unit. The following chart explainshow Self-tests work.Power to the ESU LT must be from a grounded 90-240 VAC, 50/60 Hzpower source.When ThenA power-up or com-manded self-test oc-cursThe LCD displays ADTRAN ESU LT INITIAL-IZING and the LEDs illuminate sequentially.The self-test is com-pleted with no failuresdetectedThe LCD momentarily displays ALL TESTSPASSED.A failure is detected It is displayed in the LCD window.The automatic self-test consists of the fol-lowing tests:Board level testsRandom access memory (RAM) tests; eras-able programmable read only memory(EPROM) checksum.On-board data path. Sending a known testpattern through an on-board loop.Unit level testsFront panel LED verification.Phase lock loop verify.