I have a Dahua DH-SD59430U-HNI PTZ this is a great camera but one problem that has persisted since I got it almost 6 mo ago is that the PTZ interface in BI is extremely poor. It takes numerous attempts with the arrows to get the camera to move at all and when it finally does its very inconsistant....I have checked all connection and have even swapped out a Panasonic WV-SC385 on the same connection and the Panasonic has no problems at all...I have done everything that I can think of any help is appreciated....TKS