How do I control my BNC PTZ camera if it doesn’t have Control Over Coaxial (COC)?

If you are replacing your DVR from an older system, there’s a chance your PTZ cameras do not support Control Over Coaxial (COC).

COC is a technology allowing surveillance systems to transmit video, power, and control signals (like PTZ, zoom, and OSD menus) simultaneously over a single coaxial cable.

If your camera does not support COC, you will need to use the RS485 ports on the back of your DVR. RS485 is the protocol used to send control signals to your analog cameras. The RS485 ports on the back of Viewtron DVRs typically look like this:

In this picture I have labeled the A and B ports to reflect what they may be labeled as on your camera.

—————————————————————————————————————————

Once you have connected the RS485 cables to your DVR, you will have to change the Control Protocol, BAUD rate, and Address settings in the Viewtron DVR (These values can typically be found in the OSD menu of your camera).

Once you find these values, locate the settings in the Protocol menu:

Start -> Settings – > Camera -> PTZ -> Protocol

Once you match the Protocol, Baud Rate, and Address and click Apply, you should then be able to go to the PTZ control in the Live Display menu and control your cameras.