In theory, yes. We're still not entirely sure whether it can summon demons here. That woman offered to teach us how to do it, but I haven't heard anything else from her lately, and it's not really clear whether it would be safe to do so. It also has a feature called the Harmonizer that somehow adjusts power levels so that humans can fight demons. It's unclear whether that just works on demons from our world or any other kind of creatures though.

As for exactly how it summons demons, the COMPs don't do anything special. They're basically just used to access the main server, which handles all the actual processing. I get the tech to a certain extent, but anything related to the actual demons and their magic is beyond my area of expertise.