Northern Telecom NAC User Manual page 37

Load New Software Release
Press l and {ENTER} to install a new version of the software.
Note: It is recommended that a back-up be made of the current
customer data before installing new software.
Help
Press h and {ENTER} to display the Help screen.
Quit to the Main Menu
Press q and {ENTER} to return to the main menu.
Network Administration Center System Administration and Maintenance Guide Product release 2
Maintenance and administration programs: system shutdown 4-9