smitty >> Async Adapters
choose the adapter from the list then choose "configure a defined ..."
if this does not work try running cfgmgr -v fromt he command line.
I believe the 16 port RAN units need a "node" number to be set on them, so if you have multiple units, it can identify each one on the daisy-chain seperatly. So check the node number, as well as the LCD on the front, it should be displaying "AC".
Once the adapter is available, you can go through smit to add the ttys to this devices.
crowe