Yes, we support ENUM lookup. If the phone is available, it well be called directly. And call is not billed. If not, the call will be routed to PSTN.
Nothing special for dialing. You can enter number as usual, for example:
43 720 0101010
+43 720 0101010
00 43 720 0101010
This is the same ENUM test number.
Please none, if you use the first form, the call will be never routed to PSTN.