Topic: How to integrate talkback mic with multiface ii?

Hello there, I searched for this topic and wasn't able to find any solutions.

I have a multiface ii running with a hammerfall pcie card in my studio. It works great, but I have never had a talkback mic with it. I would like to be able to integrate either a talkback mic or monitor management system with talkback (like the presonus monitor station or mackie big knob) without sacrificing one of my inputs on the multiface.

I notice that the presonus has spdif in. Would the multiface be able to communicate through it's spdif out in order to accomplish this?