AASTRA 4225 Vision for MX-ONE (TSE) User Guide EN - Manual (Page 99)

99 Dialog 4223 Professional/Dialog 4225 Vision
Settings
Handset and loudspeaker volume
Use the Volume keys to adjust 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.
ì
Press to change the volume.
The handset and loudspeaker volume level is stored.
To adjust the volume during Group Listening:
d
Replace the handset.
ì
Press to change the volume.
The handset and loudspeaker volume level is stored.
u Â
Lift the handset and press.