Library /sys$common/syshlp/ncphelp.hlb SET, MODULE, X25-PROTOCOL, DTE dte-addr, LINE line-id  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Identifies the line associated with the DTE. Specify a line name
 in the format dev-c[-u]. This parameter is mandatory when you
 specify a DTE for the first time.