I installed a mini speeddome PR7000 proline uk on a pole and and powered it from the gate house were its mounted. I then ran a control cable pvc 2pair telephone cable, to the RS485 Interface and joined it at both ends with a 4wire control cabe for a lenght of about 110m to the control point. so i have about 4 joining points.
I powered it up and tried to control with controller. Everything worked fine, pan, tilt, zoom, tour.

When i can back the next day it had failed. when every there is powercut, the control fails. i have the put the camera off for about 10 mins b4 it starts to ocntrol again. This happens over and over. i thought the camera was defective so i put a new one and its still the same problem. any suggestons on what am doing wrong. its a pelco P/D built in camera.
i need to sort this out asap

Thanks