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have 3 "HWT B120 M" cameras but only one alows to set line-crossing event
Hi, I have 3 "HWT B120 M" cameras and a "HWD-5104M" DVR I can only set line-crossing on one camera, when i try to set on the others two its says it is not suported by the camera. What could be the problem? Any help is wellcome. Thanks Luis.