You can disable the microphone or the handset to consult privately with others
in the room while listening to the other party on the phone through the speaker
or the handset.
During a conversation
The AUTO ANS/MUTE or VOICE CALL/MUTE button light shows the current status as
Flashing red: Mute
If mute is used during OHCA, it will become Handset Mute.
1.4 During a Conversation