Library /sys$common/syshlp/ctf$help.hlb Tracepoints, DEC Network Integration Server tracepoints  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 The DEC Network Integration Server supports these tracepoints:

 	HDLC LINK <link_name or *>
 	LAPB LINK <link_name or *>
 	LLC2 SAP LINK <link_name or *>
 	MODEM_CONNECT LINE <line_name or *>
 	NSP PORT <port_name or *>
 	ROUTING CIRCUIT <circuit_name or *>
 	X25L3 CIRCUIT <circuit_name or *>
 	X25L3 DTE <dte_name or *>
 	X25GAP CIRCUIT <circuit_name or *>