AASTRA 4425 IP Vision (SIP) for MX-ONE User Guide - Manual (Page 99)

Settings
Dialog 4425 IP Vision 100
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 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.
Å
Select Settings in the top menu (see display).
or Press (see display).
Repeat until the
Hearing Level menu is framed.
Select Press (see display).
The current hearing level is framed and marked.
or Press to toggle between the values Standard and Increased
(see display).
Note: The menu key Cancel can be used to leave the
menu without saving the changes.
Select Press to store the framed hearing level (see display).
Exit Press to return to the previous menu (see display),
or
Æ
press to return to idle mode.
Settings CallList Contacts CorpDirectory Web
Hearing Level
Standard
Increased
Cancel