Turn on full mute. Hold a video parent-teacher conference, and I will speak. My teacher and I can hear each other, but others can't, so the video conference host turned on the silence for all. The silence of all employees will lead to this situation. The so-called all-staff mute means that all microphones except the host (that is, the video conference initiator) are disabled during the video conference (at this time, the microphones can talk normally), which can be divided into two types: non-mandatory all-staff mute and mandatory all-staff mute.