
	-c	Cook bytes on virtual circuit.
	-d	Terminate if non-batch-mode link goes down.
	-f	Don't fork on invokation.
	-g	Don't create "log" (use stderr).
	-i	Inbound messages only.
	-l	Don't set new lockfile.
	-n	Don't adjust packet size to fit throughput.
	-o	Outbound messages only.
	-p	Ignore process id in lock file.
	-r	Don't use CRC on packet data.
	-s	Don't write statistics to log file.
	-t	Turnaround - 1/2 duplex mode.
	-u	Don't generate link UP/DOWN messages.
	-v	(Ignored.)
	-z	(Ignored.)
