AASTRA 4422 IP Office (SIP) for MX-ONE User Guide - Manual (Page 76)

Settings
Dialog 4422 IP Office 76
Time presentation
The time is updated automatically from the telephone system. You
can only change the way the time (format) is presented on the
display. The time can be shown in 24 or 12 hour clock mode.
To change the time presentation:
Settings
Ô
Press.
ì
Press.
Repeat until the
Time & date menu is framed.
Press.
The
Time Format menu is framed.
Press.
The current time presentation is framed and marked:
ì
Press to change between the 12 hour and 24 hour mode.
Note: The Clear key can be used to leave the menu without
saving the changes.
Press to store the framed time format.
The time format is changed.
Press to return to the previous menu,
or
Settings
Х Ф
press to return to idle mode.
24 hour
12 hour