Northern Telecom NAC User Manual page 16

Maintenance and administration programs: system running 3-3
Tape ID Display
Press t and {ENTER} to display the application tape identification
information. This allows the maintenance personnel to verify the NAC
application tape before installing from it.
Help
Press h and {ENTER} to display the Help screen.
Quit to Main Menu
Press q and {ENTER} to return to the main menu.
Network Administration Center System Administration and Maintenance Guide Product release 2