'> Your options are sb1 (/dev/ttyz00 - 07), sb2 (/dev/ttyz08 - 0F), sb3 (/dev/ttyz10 - 17), and any (/dev/ttyz00 - 17). For example, the sb1 option enables the eight serial ports on the first installed card and the any (default) option enables the eight serial ports on any cards installed in SBus slots.