[Freeswitch-users] Using OpenZAP + FXO card just to get CID info?

Hello I'd like to write a single-host CRM application, so I need to get the CallerID information when a call comes in. I don't actually need a PBX/softswitch. The user will have the FXO cards and a phoneset connected on the same line, and will pick up the phone once the CRM application has picked up the CID info and popped up a dialog box, etc. Is it possible to just use OpenZAP to get this information, or must I install Freeswitch and provide an IP phone as well? Thank you.