ADTRAN 1202076L1 User Manual

Contents

Chapter 7. Test Menu61202076L1-1 TSU 600 User Manual 7-7Run Self-TestThe self-test checks the integrity of the internal operation of the electron-ic components by performing memory tests and by sending and verify-ing data test patterns through all internal interfaces. Although actualuser data cannot be passed during these tests, the self-test can be runwith the network and DTE interfaces in place and will not disturb anyexternal interface.The memory portion of the self-test automatically executes upon power-up. A full self-test can be commanded from a front panel menu or fromT-Watch PRO.In addition to the specified self-tests, background tests are run on vari-ous parts of the internal electronics. These run during normal operationto confirm continued correct functioning.This menu selection is used to execute a full internal self-test. The resultsof the self-tests are displayed in the LCD. Upon invoking the command,the LCD displays System Self-Test and the Test LEDs are illuminated.Test failures are displayed in the LCD window. The self-test consists ofthe following tests:Board level testsEach of the TSU 600 boards contain an on- board processor which exe-cutes a series of tests checking the circuitry on the board.• RAM tests; EPROM checksum• DS0 map tests• On-board data path; sending a known test pattern through an on-board loopUnit level tests• Front panel LED verification• Phase Lock Loop verify• Board-to-board interface testA test pattern is sent from the controller through a loopback on all otherboards and is checked on the controller. This verifies the data path,clocks, and control signals.If a failure is detected, note the failure number and contact ADTRANTechnical Support.The execution of self-test will disrupt normal data flow and prevent re-mote communication until the self-test is completed.