AASTRA 4422 IP Office (SIP) for MX-ONE User Guide - Manual (Page 80)

Settings
Dialog 4422 IP Office 80
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 monitor call. ì
Press to adjust the volume.
The handset and loudspeaker volume level is stored.
Hearing level settings
It is possible to get an increased hearing level of +6 dB in the
handset and headset.
Settings
Ô
Press.
ì
Press.
Repeat until the
Hearing Level menu is framed.
Press.
The current hearing level is framed and marked.
ì
Press to change between the values Standard and
Increased .
Note: The Clear key can be used to leave the menu without
saving the changes.
Press to store the framed hearing level.
Press to return to the previous menu,
or
Settings
Х Ф
press to return to idle mode.
Standard
Increased