Good morning I have an NVR provision isr AND LINKED TO IT 8 CAMARASIP. From a while ago 4 of them began to freeze or a CONNECTED message but no image comes out. Two of them, one is 8 km and another 2 km via link, the team. I ask if it is a problem of the cameras or the nvr, because this problem arises randomly, it spends several days in 4 cameras and then it is fixed and it is the other 4 that manifest this inconvenience that I am expressing to them. Thank you in advance for the response and your careful diagnosis. Thank you