Normally I’d say your first step should be to get our xEM Cloner and try to scan your access card. It would beep 2 times if the card was EM based or 3 times if HID Prox based. If no beeps, then who knows. Unfortunately we are not selling that cloner at the moment. I just commented on another thread as to why not.
At this point you can post details about the system, any information on the card, etc. to see if it’s possible to determine what kind of chip is used in your card, and if it can be cloned into our xEM tag.