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Muting/Unmuting the Bottom Microphone
During a Phone, PABX, or Duplex Private Call, use the mute
feature to:
• hold conversation without being heard by the caller
• silence possible background noise in your area
1. Press Mute. The display shows Mute is On. The
microphone is muted. You can hear the incoming audio, but
the caller cannot hear any speech coming from your
MTP850.
2. To speak, press Unmute. The display shows Mute is Off.
The microphone is on.
Covert Mode
If configured by your Service Provider the Covert Mode gives
to you the ability to completely shut down all visible and
audible MTP850 alerts and notifications. This feature makes
the MTP850 effectively unnoticeable even in a silent and
dark environment.
To Enter the Covert Mode:
• Press the Cover Mode one-touch button (if programmed
by your Service Provider).
•Select Covert Mode in the Security menu (refer to
“Covert Mode” on page 125).
High/low Audio in Covert Mode
• If none of the accessories are connected to the radio then
high/low audio toggle is not enabled.
• External earpiece/PHF connected - by pressing high/low
toggle button the audio mode switches from the Internal
Microphone/Internal Earpiece to PHF Microphone/PHF
Earpiece
• PHF earpiece only connected - by pressing high/low
toggle button the audio mode switches from the Internal
Microphone/Internal Earpiece to Top Microphone/PHF
Earpiece.
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