OK, I had a fresh look at it and I think I need to go back to the drawing board. Its a Samsung Prostar DCS Compact. I assume since this looks totally different from the plain Prostar DCS stuff on ebay, its going to take differnt cards. Right now, the only card I see is the 4 COP card. I notice there is nothing installed up top where there is some mounts for additional equipment. Any idea what this would take to install caller id?