Customizing the telephone
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Assigning functions / call numbers to keys
Deleting key assignments
Press the “Menu” function key.
Scroll to the Settings menu item.
Confirm your selection.
Scroll to the Keys menu item.
Confirm your selection.
Scroll to the Function keys or Destination dialling menu item.
Confirm your selection.
Scroll to the Delete function key or Delete dest. key menu item.
Confirm your selection.
Press the key of which you want to delete the assignment. The key is now
free again.