hi all 
  
 been given a ptz camera and i am a novice on these the conections on it are a BNC for the video and it looks like a ethernet plug rj45?? and thats it so my question is  
  
1 how is it powered and controled? 
2 how can i wire it to power it and to work with rs485 port? 
  
camera make is TEB LB  
BULLE CAMERA 98 
BC990425   
  
thanks for any help in advance