AASTRA DT4x2 for MX-ONE User Guide EN - Manual (Page 30)

Switching On/Off
DT412/DT422/DT432 30
Switch off
Notes:
During calls, you cannot switch off your phone.
It is recommended that you program the Switch off function
as a Hot key, see section “ Hot keys and Soft keys ” on
page 100 . If you do not program a Hot key, you can use the
menus, see section “ Modes ” on page 94 .
If you have programmed a Hot key:
å
Press and hold the Hot key. ã
Yes Ok
Press to confirm (see display).
Now your phone is switched off.