NEC LT180 - Manual (Page 46)

E-39
5. USING ON-SCREEN MENU
2. Select “On” and press the ENTER button.
The [Keyword] screen will be displayed.
3. Type in a combination of the four SELECT ̆̄̇̈ buttons and press the ENTER button.
NOTE: A keyword must be four to 10 digits in length.
The [Confirm Keyword] screen will be displayed.
4 Type in the same combination of SELECT ̆̄̇̈ buttons and press the ENTER button.
The confirmation screen will be displayed.
5. Select “Yes” and press the ENTER button.
The Security function has been enabled.