Installation and Maintenance Manual - Aastra 5000 AMT/PTD/PBX/0058/4/6/ENINSTALLING A5000 SERVER (Non-redundant)01/2011 Page 47710.8 Upgrading Aastra 5000 Server software R5.1 to R5.2Note : See also Aastra Management Portal operating manual.10.8.1 PrincipleThis R5.2 upgrade procedure applies to A5000 Server systems already working in R5.1.To upgrade to R5.2, you must:• Make a backup before starting the upgrade procedure.• Upgrade the Linux OS to 5.4• Reinstall the Aastra 5000 Server R5.2 software• Restore R5.1 data in the new R5.2 environment• The new software licence associated with R5.2 must be retrieved before starting theprocedure.Note : Linux Redhat 5.4 may equally be fully reinstalled without going through the upgrade phase.In this case, refer to document Red Hat OS Installation manual. Then reinstall the Aastra5000 Server R5.2 software.10.8.2 Upgrading Red Hat 5.4• Insert the RHEL 5.4 software DVD in the DVD drive of the master A5000 Server PC,then restart the A5000 Server.• On boot: prompt, press Enter.• Click Skip to start the upgrade without testing the DVD.• Click Next, then select the language: English• Select the keyboard layout: English• Select Ignore system number input then click Validate.• Confirm by clicking Ignore again.• Select Upgrade an existing system then click Next.• Select Upgrade the start charger configuration then click Next.• Click Next to start upgrading Red Hat Enterprise R5.4.• At the end of the installation, remove the Red Hat 5.4 DVD from the drive then clickRestart.