Your system can automatically adapt to several different terminal speeds and settings. The same program that displays the login message, getty(M) reads these terminal line values from a table, trying each setting until one is successful, and the user can log in to the system. This table provides several default settings for different kinds of terminal lines.
getty automatically executes as part of the login process. The table of terminal settings is found in a file called /etc/gettydefs. You can edit /etc/gettydefs to add different sets of terminal characteristics or to change the existing ones. See the gettydefs(F) manual page for a description of the format of this file.