/sys$common/syshlp/helplib.hlb DECnet-Plus, DCL Commands, SET, HOST, /X29, Qualifiers, /BREAK_CHARACTER=character  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /NOBREAK_CHARACTER

    (Default=/NOBREAK_CHARACTER)

    This qualifier sets up a control character which has the same
    effect as entering the BREAK command.  The character must be a
    single letter representing a control character.  For example,
    if the character is K, <CTRL/K> acts as a BREAK key.