User's Manual 8. Performing Advanced Operations
Version 3.0.4 99 445HD IP Phone
8.10 Muting Your Speaker, Handset or Headset
During a call, you can mute the microphone of the handset, headset or speaker so that the other
side cannot hear you. While the call is muted, you can still hear the other party. Muting the
microphone of the handset, headset or speaker can also be performed during conference calls.
To mute/unmute:
1. During a call, press the mute key on the phone.
2. To unmute, press the mute key again.