Ericsson DIALOG 4223 PROFESSIONAL - MANUAL 2 User Manual page 102

Settings
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102
Handset and loudspeaker volume
Use the Volume keys to change the volume of the handset or
loudspeaker during a call. Adjust the handset listening volume
when the handset is off hook. Adjust the loudspeaker volume when
dial tone is heard via the loudspeaker, or during a handsfree call.
Press to change the volume.
The handset and loudspeaker volume level is stored.
To adjust the volume during Group listening:
Replace the handset.
Press to change the volume.
The handset and loudspeaker volume level is stored.
Lift the handset and press.
Dialog 4223 Professional/Dialog 4225 Vision