OpenEye OE3 E-Series - Manual (Page 78)

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LED Status Indicators
Power Illuminates when power is supplied to the DVR.
HDD Flashes when the hard drive is being accessed.
Network Illuminates when the DVR is connected to a network.
Enter / Exit Buttons
Enter Input data, make selections, and open pop-up menus.
Exit Return to the previous mode or menu, without saving.