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

    Default: System dependent, determined    Value: NSAP address
             at run-time

    A local NSAP address to be used by default if one is not supplied
    across the service interface.

    set  [node node-id] osi transport template template-id -
         local nsap nsap-address