10SN Icon Name Note8 HDMI High DefinitionMedia InterfaceHigh definition audio and video signal output port. Ittransmits uncompressed high definition video andmultiple-channel data to the HDMI port of the displaydevice.9 Network port 100M Ethernet port10 AUDIOOUTAudio outputport Connect to video output device such as sound box.2.2.2 CJ-HDR416This rear panel is shown as below. See Figure 2-4.Figure 2-4Please refer to the following sheet for detailed information.SN Icon Name Note1 Power switch Power on/off button.2 RS-232 RS-232 debug COM.It is for general COM debug to configureIP address or transfer transparent COMdata.3 1~16 Alarm input port 1~16 There are four groups. The firstgroup is from port 1 to port 4, thesecond group is from port 5 to port 8,the third group is from 9 to 12, andthe fourth group is from 13 to 16.They are to receive the signal fromthe external alarm source. There aretwo types; NO (normal open)/NC(normal close). When your alarm input device isusing external power, please makesure the device and the DVR havethe same ground.