Hi! There is a strange workaroung for this problem: start "cu -l cuaa0" then switch to another terminal, do "stty -crtscts </dev/cuaa0" and cu starts to work as expected (for this run only). It seems that cu(1) does not respect prior command "stty -crtscts </dev/cuaia0" anymore. Or it might be a kernel bug as preliminary "stty -crtscts </dev/cuala0" does not help too. Eugene Grosbein