Mitel 4150 - Manual (Page 15)

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To use Handsfree Operation to make calls:
1. If you want to use a Non-Prime Line, press a Line Appearance key.
2. Dial the number.
3. Communicate by using the speaker and the microphone.
To use Handsfree Operation to answer calls:
1. Press the flashing line key.
2. Communicate by using the speaker and the microphone.
To hang up while using Handsfree Operation:
z
Press SPEAKER.
To temporarily disable the microphone during a Handsfree
conversation:
z
Press MICROPHONE (the microphone LED turns off).
To re-enable the microphone and return to the conversation:
z
Press MICROPHONE (the microphone LED turns on).
To disable Handsfree Operation:
z
Lift the handset.
To return to Handsfree Operation:
1. Press SPEAKER.
2. Hang up.