This is in the README on the download page :

untar from / to create /opt/freeswitch
optionally edit files in /opt/freeswitch/conf
run /opt/freeswitch/bin/freeswitch

This means you need :

- the xerm console
- to be root
- to know how to change directories, use the 'tar' command, edit files and run programs from the command line

In other words, it's not a regular Maemo end-user package (yet).