AASTRA DT4x2 for MX-ONE User Guide EN - Manual (Page 22)

Description
DT412/DT422/DT432 22
Menu structure
The available phone and network functions can be accessed via
the menus. ç
Press the Menu key to enter or exit the menus.
The last used tab is marked, or if the phone has been restarted, the
menu tab Contacts.
Use the Navigation key (left/right) to choose tab and press the
Navigation key (down) to open it; a heading is shown and the first
alternative is marked. Use the Navigation key (up/down) to step in
the alternatives and select one by pressing Navigation key (right).
Notes:
Since the phone can be used in several networks, some
functions might not be supported in your network.
A parameter setting in the SIM card determines if changes
that are made from the menu is saved on the SIM card. If
changes are not saved on the SIM card, they will be
discarded when the phone is restarted.