If you can access the 8.1 module using WinSCP, copy over the Greetings, Names, Accounts, Wav. Also the mdb file.
You can copy these back over to the new app server. Make sure you change the permissions and ownership to the correct settings.
Upgrading for 8.1 to 11.1 will be hit or miss and take you 8-12 hours of your life if you can get the thing to upgrade even one step you are lucky.
Upgrade 3-4 steps. 12 hours. Or simply try my post above.