@200356092
You may try to use a headset with a physical mute-switch.
As far as I have seen USB-Devices and wireless-Devices offer software-mute-buttons which is probably not what your are looking for since its just a software-signal to the Operating-System to mute your microphone.
I guess wired headets with a classic headphone-jack offer "real" mute-switches since they disconnect the wiring.
Example:
![grafik.png grafik.png](https://community.cisco.com/t5/image/serverpage/image-id/83401i82D63A03523C97CD/image-size/large?v=v2&px=999)