> 
> The following trouble must be FAQ. Please let me know the pointer or URL.
> 
> I typed like this.
> 
> I:	% cu -l /dev/tty00
> SE/30:	Connected.
> I:	at(I tried to type...)
> SE/30:	cu: write: Input/output error
> 	Disconnected.
> I:	% tip com0b
> SE/30:	link down
> 
> Please let me know how I solve this trouble.

Don't bother with trying cu. Just use tip directly. I think you have things
set up correctly.

> Machine:
> 	SE/30 (8M/40M + 1G)
> 	
> /etc/remote:
> com0b:dev=/dev/tty00:br#2400:
> 
> /etc/ttys:
> tty00	"/usr/libexec/getty std.9600"	unknown off secure
> 
> /dev/tty00:
> crw-rw-rw	1	uucp	wheel	12,	0	Dec 23 02:38 /ev/tty00

Take care,

Bill