Google won't help you. Use dmesg and the manpages. OK, first dmesg to find the real serial io ports. If necessary man every device listed in dmesg.
I think you'll find that you have a zs or a sab device. man sab Look in the FILES and SEE ALSO sections of the manpage. The message you get means that the carrier detect part of the driver hasn't yet detected a carrier. Traditional ways to deal with this were to re-wire the connector to cheat, or to use a driver (often by a mode bit in mknod) which ignores carrier. ttyb is AFAIK deprecated in favor of ttyNN. -sam
