Dell PowerEdge C6220 II - Manual (Page 71)

Using the System Setup Program | 71
 Boot Manager – Legacy Mode
Console Redirection
The console redirection allows a remote user to diagnose and fix problems
on a server, which has not successfully booted the operating system. The
centerpiece of the console redirection is the BIOS Console. The BIOS
Console is a Flash ROM-resident utility that redirects input and output
over a serial or modem connection.
The BIOS supports console redirection to a serial port. If serial port based
headless server support is provided by the system, the system must provide
support for redirection of all BIOS driven console I/O to the serial port. The
driver for the serial console must be capable of supporting the functionality
documented in the
ANSI Terminal Definition.