1, the body comes with a 485 or 232 interface is not used to connect the PTZ, where the 232 is connected to the computer for the bottom of the configuration or maintenance is useful, the 485 interface does not have the function of connecting the PTZ. NVR to set up the PTZ protocol, the device connected to the network PTZ is not a front-end device if the NVR recognizes the front-end equipment is not PTZ-type devices do not provide PTZ configuration page;
To realize the control of the 301 PTZ through the NVR, you can install a network camera with RS485 output interface on the 301 PTZ (DS-2CD3A20F-IS has the interface), and the related PTZ protocol and other information can be configured in the camera parameters.