Library /sys$common/syshlp/latcp$help.hlb SET, SERVICE, Qualifiers, /QUEUED  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /QUEUED
       /NOQUEUED

    Specifies whether a locally offered limited (/LIMITED) or
    application (/DEDICATED) service is allowed to have queued
    connections when all ports are busy (the default). If you specify
    /NOQUEUED, incoming connections will be rejected if all ports are
    busy.