There is really only one way to do this. It is different depending on the type of CCTV dvr you have. If you have a standalone security dvr, there should be a green "RS485" connector on the back of the machine, that input has the inputs for your twisted pair. You simply just screw down the wire in the correct socket. If your standalone dvr does not have that, then you can buy a PTZ controller and integrate that with your standalone dvr. If you have a PC based security dvr, then you are going to have to have an RS485 to RS232 connector. The RS485 input is where you connect the data part of your PTZ camera. Most PC's do not have serial ports embedded onto the mother board. If not then you will need to find the card (PCI RS485 port) or get a USB to serial adapter so that you can connect your RS485 connector to the serial connection and then run your twisted pair into the approiate slots. Sounds complicated, but all you need to do is have the right setup and just plug and play.