Integrate Asterisk with NEC NEAX 2000 IVS

We are currently using NEC NEAX 2000 IVS. Is it possible to install a asterisk server and integrate it with the NEAX 2000 IVS system. Asterisk server will be only for voip phones. Can calls on the analog system (NEAX 2000 IVS) be routed to through the asterisk server if its intended for a voip extension and vise versa. I don’t have experience with the NEC NEAX 2000 IVS system.
Can someone please provide some ideas as to how the above can be done.