Key Digital KD-CX800 Control Over IP InterfaceKD CX800 is a control over IP interface with three multi function control ports supporting bi directional RS 232, IR emitter output, IR learning input, voltage trigger, or voltage sensor. Features 3 Multi Function Control Ports: All 3 ports can be IR or voltage trigger output, port 1 may be configured as IR Sensor input, port 2 and 3 may be configured as RS 232 ports USB Configuration: Quick setup using KDMS Pro or Master Controller Device Manager