On the Communication Manager Messgaing Web page, there is a link to download and update the required software for the messaging system. The downloads include RFUs, Announcements and so on.
To install software for the messaging system:
Note Advanced Software Installation link under Software Management allows download and installation of multiple files.
Additional software packages, primarily additional announcement sets, may be installed from a CD inserted into your laptop or from technical support websites.
Most software installations require the voice system to stop. Plan to do the installation during low usage hours.