Network and Analog Control: Two IP control modes (IP VISCA & ONVIF); Two analog control modes (RS422 & RS232). RS422 communication interface has the over-current protection ability to recover from short circuit. Easy Connection: The PTZ camer controller supports browser to add camera configuration parameters. Built in web server makes the configuration interface simple and clean; It only takes few steps to achieve perfect control of the PTZ camera. 4D joystick: The PTZ camera controller adopts 4D joystick to control the camera speed, rotation, zoom, aperture, focus and other parameter settings. It also has Rocker Switch and Knob. Max 255 Cameras: Max up to 255 cameras. The max communication distance is up to1200M PoE: The PTZ Controller supports Power Over Ethernet (PoE). Take control of PTZ cameras and controller all across network with a PoE network switch.