Version 2.0 89Auxiliary Operator’s ManualAUX7 -Unit InformationThis screen indicates the specific CDU model, software version num-ber, the hardware configuration, and the printed circuit board (PCB)serial number of your CDU. If you are having problems with yourCDU, refer to this screen for information to provide to customer ser-vice personnel.A special softkey sequence displays sub version levels, the actualsoftware build date and time, and allows access to a selftest sequence.This information is useful to the technician and our Field Engineersduring troubleshooting. To activate the screen, press the left mostsoftkey three (3) times. Additional information in the Software windowwill be displayed.MX420/2 AUX7 ScreensThis also activates several engineering screens (the same as turningEngineering Display to Yes in CFG1 Operation). Refer to Appendix C- Engineering Mode for more details.