[Freeswitch-users] Share PRI line?

We have a client with a Mitel PBX with a PRI connected to it. We are deploying a freeswitch box that will do some autodialing tasks for them. Is there a way to share the PRI between the two systems? If nothing else, I'm pretty sure I can put a two line interface card in the Freeswitch server, plug the pri into it, then connected the other interface to the Mitel box, but that would make our box a point of failure and I'd like to avoid that if possible.