Hello,
I have an issue, my Asterisk machine will be in an enviroment where there will be no internet connection - therefore I cannot upgrade or install any modules.
Is it possible to download modules and install them manualy?
Yes, all modules can be downloaded from http://freepbx.org/trac/browser/modules/release/2.5 (if you run 2.5).
From Module Admin you can select Upload module and browse for the downloaded module.
Great, thanks for the link!