what happened to /dev/cuaa0

[Anton Shterenlikht]

> Switching to cuad* should have worked.  sio(4) was the only driver
> where the cua* and tty* devices had different letters, so the cuaa*
> devices were renamed in 6.0 to match their ttyd* counterparts.  If
> you're using an internal modem, if may be a "Winmodem" requiring a
> special driver.  The comms/ltmdm port may help here.  If it's an
> external modem, try cuad1.

After reading Section 22.2.2.2.2 of the Handbook my understaning is that
the same serial port can be addressed as either /dev/ttydN or /dev/cuadN.
Is that correct?

I'm confused by the "Call-in" - "Call-out" terminology. I have an
external modem connected to 1st serial port, and I use it as /dev/ttyd0.
Does it mean it becomes a call-in device?

thanks
anton