Library /sys$common/syshlp/CTF$HELP.HLB — Tracepoints VAX WAN Device Driver tracepoints
VAX WAN Device Drivers support these tracepoints:
DDCMP LINK <link_name or *>
HDLC LINK <link_name or *>
LAPB LINK <link_name or *>
MODEM_CONNECT LINE <line_name or *>