/sys$common/syshlp/helplib.hlb Sys Parameters, LGI_RETRY_LIM  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    LGI_RETRY_LIM specifies the number of retry attempts allowed
    users attempting to log in. If this parameter is greater than 0,
    and a legitimate user fails to log in correctly because of typing
    errors, the user does not automatically lose the carrier. Instead
    (provided that LGI_RETRY_TMO has not elapsed), by pressing the
    Return key, the user is prompted to enter the user name and
    password again. Once the specified number of attempts has been
    made without success, the user loses the carrier. As long as
    neither LGI_BRK_LIM nor LGI_BRK_TMO has elapsed, the user can
    dial in again and reattempt login.

    LGI_RETRY_LIM is a DYNAMIC parameter.