Voice over keys, using the Focus 40 Blue classic

Braille on Apple Products
Hello all. I have a Focus 40 Blue paired with my Mac, running Mountain Lion. I'm trying to use the Braille more, so I won't rely on the Mac's keyboard or trackpad as much. In looking at the commands that are already assigned, I don't see one for using the voice over keys, I.e. Control and option. Am I missing something? I know how to get to the dock, and a few other basic things. If anyone could help me use this more effectively, I would greatly appreciate it. Thanks.