Settings
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Handset and loudspeaker volume
Use the volume keys. You can set different volume levels for
internal and external calls and for Background Music. During a call,
adjust handset listening volume in handset mode. Adjust
loudspeaker volume in Monitor mode or during Background Music.
General:
Press to change the volume.
Loudspeaker volume during Group Listening
Note: Dialog 4220 Lite only.
Replace the handset.
Press to change the volume.
Lift the handset.
Press the Loudspeaker key.
BusinessPhone – Dialog 4220 Lite / Dialog 3210