AASTRA DT4x2 for MX-ONE User Guide EN - Manual (Page 94)

Modes
DT412/DT422/DT432 94
Modes
The phone is equipped with ten modes. Two modes are preset at
delivery and the remaining eight modes are defined by you. The
preset modes are; Normal, and In charger.
The option Switch off is also located in the Modes menu.
Normal mode
The Normal mode is the default mode.
In charger mode
The In charger mode is activated when the phone is placed in the
charger and deactivated when removed, it cannot be manually
selected. Your last selected mode is automatically chosen when
the phone is removed from the charger.
User defined modes
Eight modes can be defined and saved by you. The modes can, for
example, be used to create a special headset mode with different
ring signal volume and automatic answer of incoming calls.
Another example is when several users are sharing the same
phone. Each user can then define his own settings, for example;
type of ring signal, volume, answering method, Soft key settings
etc. Note that one has to change to the user defined modes
manually.