User Guide for the VC800 Video Conferencing System1845. Speak into the microphone.6. Check whether the microphone can pick up audio normally.7. If the microphone picks up audio and plays back audio normally, it means that the audioworks well.8. Press to stop audio diagnostics.Camera Diagnose:1. Select (More menu).2. Press or to scroll to Setting and then press to expand the menu.3. Press or to scroll to Diagnose and then press to enter submenu.4. Press or to scroll to Camera Diagnose and then press .5. Press or to adjust the camera position.https://arttel.ru/https://arttel.ru/shop/videokonferentsii/yealink-vc800-cp960-8way