NEC NEAX Express Service & Reference Manual page 192

The above figure shows the EMP Console window in redirect state with the terminal
window. The text that appears on the server monitor displays in the redirect window.
Availability of the various EMP Console features is determined by two things: the EMP
access mode selected during configuration in the System Management Submenu of the
BIOS Server Menu, and if the server's COM 2 port is configured for console redirection
in BIOS. The three EMP access modes are disabled, pre-boot, and always active.
EMP Console Access Modes (Server Configured for Console Redirection)
Mode
Disabled
Pre-boot
Always Active
*The operation mode can be modified by selections in the post reset and post-power-up dialogs.
These are server control dialogs available with the EMP Console.
C-4 Emergency Management Port
EMP Console in Redirect State
Server is powered off
Redirect window appears,
but is blank
EMP commands available
EMP commands available
During POST After OS boots
Redirect window Redirect window
Redirect window* Inactive redirect
window
Redirect window* EMP commands
available