Ericsson DIALOG 4422 - Manual (Page 46)

During Calls
Dialog 4422 IP Office 46
During Calls
Group Listening (loudspeaker)
(Dialog 4422 v. 1 phone only).
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 in the loudspeaker.
During an ongoing conversation: Â
Press to switch between loudspeaker and handset.
When the key lamp is on, the other party´s voice can be heard in
the loudspeaker.
Note: You can adjust the volume, See section “ Settings ” on
page 75.