To control your PTZ camera with our PTZ Controller software, you must connect your PTZ camera with your computer at first.
For computer, the RS232 port (serial port), so called COM port, is for connecting with PTZ camera.
For PTZ camera, it has a RS485/422 port to plug in the control cable.
In order to connect a PTZ camera to a computer, You need a RS485/RS232 or RS422/RS232 converter.
If there is no RS232 port on your computer, you also can use a RS485/USB or RS422/USB converter.