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During Calls
Dialog 4223 Professional/Dialog 4225 Vision52
During Calls
Group Listening (loudspeaking)
This feature lets other people in your room listen to your phone
conversation. You speak in the handset while the other party´s
voice is heard on the loudspeaker.
During an ongoing conversation:
 Press to switch between loudspeaker and handset.
When the key lamp is on, the other party´s voice can be heard on
the loudspeaker.
Note: You can adjust the volume, See section “Settings” on
page 98.
From loudspeaking to handsfree
d Replace the handset.
Handsfree conversation.
From handsfree to loudspeaking
u Lift the handset and press.
í Press to end the call.