Please say if this is posted elsewhere, I can find it. One big issue with the 3CX Video Conferencing is that you can not test your Audio (and Web Cam) settings before you enter the conference. You then find you are in the conference and they can't hear you, or you can't hear them, or you web cam is pointing somewhere you don't want it to be. Could a box pop open asking you to test and change your settings before you start the conference. WebEx does this very well, you get to hear a sound, if you can't you can change which audio device to use. You can test you mic, by seeing a sound meter (bar) and you get a preview of your Webcam.