I am not familiar with the ASC EVOIP solution, but I would assume that it works similarly to other recorders and you have a physical connection to your PRI on the recorder. If so, you would have to check with your rep to see what options they have. I know other manufacturers, Oaisys for example, have network side monitoring that would work the SIP trunks. You set up a mirrored port on your network to pull the calls to the recorder and you don't have a PRI tap. I assume that this works with SIP trunks, I haven't used it in that way.