Mitel 4150 - Manual (Page 16)

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Group Listen
To allow others in the room to listen to the far end of a handset call:
z
Press the Group Listen feature key.
To return to a private two-way handset call from Group Listen:
z
Press the Group Listen feature key.
To allow others in the room to join a telephone conversation:
z
Press SPEAKER.
To return to a private two-way handset call from Speaker:
z
Press MICROPHONE.
Auto-Answer
To enable or disable Auto-Answer:
z
Press the Auto-Answer feature key.
To answer a call when you hear ringback:
z
Communicate by using the speaker and the microphone.
To terminate a call:
z
Press CANCEL.
-
OR -
Wait for the caller to hang up.