When you go to Visual Warning/Voice Warning you should see "pictures" of the various camera types in the top row..along with railway, schools, etc.
If you tap "Select All", you will get the warnings you specify.
What the
voice will say depends on two things: 1) the text file that your speedcam database was created from 2) the type of voice you are using.
OR you can just hear a 'beep' if you choose NOT to enable anything in the Voice Warning section.
Try various settings, and you will figure it out easily as you pass cams.
In simulation mode, you will get no sound warnings at all (but you should see the icons for the cams on the map).
By the way, if you use the new diMka skin for Primo 2.0, you will find more options for many things...including warnings.
http://www.navitotal.com/showthread.php?8454-Primo-2.0-Skins