security system

Hi All, I moved into a home that was monitored by ADT. The previous owner had the monitoring stopped but the system remains. Is it possible to reset the passcode and disconnect the phone line and use it as a non monitored alarm? Labeling inside the control panel is as follows: LYNXR/L ; LYNXR24/L ; LYNXR-EN ADEMCO MODEL 1332 / 1332X10 (CANADA 1332CN) Thanks Dave