I can't call an extention on bluetooth

Hi all

My non-smart phone works fine with the base audio system but, I can't seem to insert a pause (or * etc.) to dial an extension from the speed dial list nor if I use a call history number. I don't know how to do it automatically on my cell either, I just wait and enter the extension number when prompted. This means I have to stop the car to enter an extension. Any suggestions? Thanx from Montreal.