To mute the microphone:
- During a call, press .
- The three console LEDs glow red to indicate that the other party (or parties) cannot hear you. You can still hear all other parties while Mute is enabled.
- To turn off the Mute feature, press again .
To mute the microphone if you use external microphones:
- Press on the phone or the mute button on the top of the external microphones.
- To turn off the Mute feature, press again.