VMS Help SET, TERMINAL, Qualifiers, /AUTOBAUD  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /AUTOBAUD
       /NOAUTOBAUD

    Controls whether the terminal baud rate is set when you log in
    and sets the default terminal speed to 9600. You must press
    Return two or more times at intervals of at least 1 second for
    the baud rate to be determined correctly. If you press a key
    other than Return, the /AUTOBAUD qualifier may detect the wrong
    baud rate. If this happens, wait for the login procedure to time
    out before continuing. The /AUTOBAUD qualifier must be used with
    the /PERMANENT qualifier.

    The valid baud rates are as follows:

     50       150       1800       4800       38400
     75       300       2000       7200       57600
    110       600       2400       9600       76800
    134      1200       3600      19200      115200