I run a small PBX based on the FreePBX distro of Asterisk. The installation has been steadily upgraded but for various reasons, we want to start again on a new server with a clean install from the distribution media.
Will I be able to take a backup from the old server and restore it to the new server, even though the installs are different versions? How sensitive are FreePBX backups to the build version? Is it possible to get at least a partial restore?
Generally you're best off bringing both machines to the same version before trying to restore.
If you don't go that route the thing to watch out for is schema changes between versions.
Read the changelog carefully, and mount a scratch monkey before sacrificing your production environment (while virtual machines won't work for VOIP they are fine for testing a restore...)