364 CHAPTER 14: L ICENSING AND UPGRADESTo view the license detail report, click Licensing and Upgrades > Licenses> License Details.Software Upgrade As part of the upgrade and reboot process, you can choose to use yourexisting configuration data with the new version of the software or use anew (empty) database. the NBX NetSet utility allows you to choose whichsoftware version to use when you reboot the system. This allows you torestore an earlier operating environment (both software andconfiguration data), if necessary.To upgrade or remove software:1 Log on to the NBX NetSet utility using the administrator login ID andpassword.2 Click System Maintenance > System Software Upgrade.3 See the online Help for procedures to upgrade or remove software.Software Upgrade NotesRelease 4.2 introduced system software licensing. Be sure to review theinformation in the next topic, System Software Licensing, before youupgrade your system software.■ See the Software Upgrade Procedure, which is available on the NBXResource Pack DVD or from www.3com.com, for information abouthow to upgrade a specific release of software.■ To run system software release R4.2 and higher, you must install alicense key.■ A license key is required only for upgrading to major releases, RX.X.All minor releases, RX.X.X, use the corresponding major release licensekey.■ To upgrade a system to release R4.3 first upgrade to release R4.2.■ To upgrade a system to release R4.2 first upgrade to release R4.1.■ A 4.3 license is valid for both a 4.1-to-4.2 upgrade as well as the4.2-to-4.3 upgrade.■ When you upgrade the system software, do not enter any “cd...”commands using the terminal emulation software on a PC attached tothe Call Processor.