With the Package Manager you can install and manage packages that extend the functionality of OTRS. See the Additional applications section for a discussion on the extensions that are available from the OTRS repositories.
In the package manager you can review the packages you currently have installed together with their version numbers.
You can install packages from a remote host by selecting the repository in the Online Repository section and clicking the Update button. The right side of the screen shows the available packages. You can install a package by clicking on the Install button. After installation the package is displayed in the Local Repositorysection.
To upgrade an installed package, the list of available packages in the online repository will show Upgrade in the Action column for any package that has a higher version than installed locally. Just click Upgrade and it will install the package on your system.
In some cases, such as when your OTRS system is not connected to the Internet, you can also install packages you have downloaded to a local disk. Click the Browse button next to the Package field and select the .opm file on your disk. Click Open and then Install. After installation the package is displayed in the Local Repository section. You can use the same steps for updating a package that is already installed.
In special cases you might want to configure the package manager, for instance to use a proxy, or to use a local repository. Just take a look at the available options in SysConfig under Framework:Core::Package.