334 CHAPTER 8: OPERATIONSImportant UpgradeNotes■ To run NBX 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 an NBX system to release R4.3 you must first upgrade torelease R4.2.■ To upgrade an NBX system to release R4.2 you must first upgrade torelease 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 NBX Network Call Processor.■ When the software upgrade is complete, a new window, containing aconfirmation message, appears in NBX NetSet.■ At certain times during an upgrade, the system reboots itself. Do notinterrupt the reboot; wait until the upgrade is complete.■ Before you upgrade your system software, 3Com recommends thatyou back up your system data. (See “Backup” on page 340.)■ If you are using NBX PC applications, such as pcXset, you must alsoupgrade these applications after upgrading the NBX software.■ If you are connected to the NCP COM1 port, you see the upgradeactivity messages during the upgrade process, but you cannot issueany commands.■ After you upgrade your system software, you must reboot the system.To upgrade or remove software:1 Log on to the NBX NetSet utility using the administrator login ID andpassword.2 Click Operations > Software Upgrade. See the Help for procedures onupgrading or removing software.System SoftwareLicensingTo run release R4.2 and all later releases of the NBX V3000 systemsoftware on your NBX system, you must have and install a license. Alicense key is required only for upgrading to major releases, RX.X. Allminor releases, RX.X.X, use the corresponding major release license key.
