Library /sys$common/syshlp/ncphelp.hlb LOAD, NODE, SERVICE DEVICE device-type  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Identifies the target node's line controller for the service line over
 which the operation is to take place.  See HELP PARAMETERS DEVICE-TYPE
 for a list of devices.

 Only the synchronous port on the DMF service device may be used for
 service operations.