>
>
>I just tested a Dacomex USB to 2 serial ports and it didn't work:
>it can receive chars, but it seems it doesn't transmit anything ...
>

I noticed the same problem using a generic Prolific (uplcom(4)) USB to 
serial device (only one port).
It's not a null-modem cable problem since using it alone (w/out adapter) 
I can receive and send data.
Any hint appreciated :)

Regards

--
dixie