You could install either a TTS voice or a skin. (or both)
* I am told TTS voices announce the cameras. I can't tell for sure because I do not use TTS.
* Do like me and install a skin, I would say diMKa is a good choice (I use it on Primo). Gurjon is a excellent alternative.
Skins give you more control about the announcements and will give extra features. When TTS is installed, you can have the TTS make the announcements. When not (or you don't want TTS announcing the cams) you need to install an audio folder - same way, same folder for diMKA and Gurjon. More info on the diMKa web page :
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