A customer recently inquired with the following question:
Does your multiplexer VM-99015 support PTZ RS-485 control and if it does will I be able to control multiple PTZ Cameras.

CCTV Camera Pros Response:
Unfortunately that product does not support RS-485,
you will see the video but as far as the controls it will have to be through a separate RS-485 controller as seen here http://www.cctvcamerapros.com/PTZ-Camera-Controller-p/ck-983321.htm. This will allow you to control multiple cameras as well as set preset locations and camera tours or we have model number VM-16RT which does have rs-485 inputs for PTZ control http://www.cctvcamerapros.com/video-mux-cctv-multiplexer-p/vm-16rt.htm
This same solution will work for DVR's that do not have built in RS-485 Control.