Library /sys$common/syshlp/nclhelp.hlb limit  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Limits a station exclusively to unsequenced data service.

    limit  [node node-id] hdlc link link-name logical station -
           logical-station-name

    Example:

    limit hdlc link hdlc-0 logical station hdlc-0