Due to its build-in P16 Ultranet, it is possible to use an X Air 18, with this device, and most of the time it works fine.
During testing, i have had issues sometimes, depending on what network cable i am using. If the cable gets disconnected while X Air 18 and DN4816-O is powered on, re-connecting the cable sometimes results in noise and corrupted digital signal. But usually this can be fixed with a power cycle of the DN4816-O with the cable connected.