Traditional Culture Encyclopedia - Photography and portraiture - What are the red and green lights of the JEC surveillance camera in the classroom?
What are the red and green lights of the JEC surveillance camera in the classroom?
JEC is a spherical camera produced by a manufacturer in Tianjin. Under normal circumstances, it can rotate. The red one is the power indicator, indicating that he is supplying power normally. The green one is the 485 signal indicator that controls the rotation. If it flashes, it generally means that someone is controlling his rotation or scaling in the monitoring room. Is my answer okay?
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