Library /sys$common/syshlp/ncphelp.hlb SET, NODE, SERVICE CIRCUIT circuit-id  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Establishes the circuit to be used for downline loading. This is the
 default value for the VIA  parameter of the LOAD and CONNECT commands.
 The node identification must be that of the target node.