two-way communication through the same port under SunOs 4.0

[Robert Claeson]

> ...I've tried this, and I think I have all
> my gettytab, ttytab and /etc/remote entries correct, but the getty on ttya
> (or ttyd0, or ttym0, no matter how I try it) renders /dev/cua0 busy for
> outgoing calls.  According to my manual, this isn't supposed to happen.

You have to enable modem control on the port for this to work, or else the
tty driver will think that there's always something coming in thru the
port.

-prc