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

    LGI_RETRY_TMO specifies the number of seconds allowed between
    login retry attempts after each login failure. (Users can
    initiate login retries by pressing the Return key.) This
    parameter is intended to be used with the LGI_RETRY_LIM
    parameter; it allows dialup users a reasonable amount of time
    and number of opportunities to attempt logins before they lose
    the carrier.

    LGI_RETRY_TMO is a DYNAMIC parameter.