39Name FunctionMIC OUT Audio output port Audio output port. It is to output the analog audio signalto the devices such as the sound box. Bidirectional talk output. Audio output on 1-window video monitor. Audio output on 1-window video playback.1～4 Alarm input port1～4 There are two types; NO (normal open)/NC(normal close). When your alarm input device is using externalpower, please make sure the device and the NVRhave the same ground.GND Alarm input ground port.N1, N2 Alarm output port1～2 2 groups of alarm output ports. (Group 1：portNO1～C1,Group 2:port NO2～C2).Output alarmsignal to the alarm device. Please make sure thereis power to the external alarm device. NO：Normal open alarm output port. C：Alarm output public end.C1, C2A RS-485communicationportRS485_A port. It is the cable A. You can connect to thecontrol devices such as speed dome PTZ.B RS485_B.It is the cable B. You can connect to thecontrol devices such as speed dome PTZ.Network port 10M/100M/1000Mbps self-adaptive Ethernet port.Connect to the network cable.USB2.0portUSB2.0 port. Connect to mouse, USB storage device,USB burner and etc.RS-232 RS-232 debugCOM.It is for general COM debug to configure IP address ortransfer transparent COM data.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. HDMI version is 1.4.VGA VGA videooutput portVGA video output port. Output analog video signal. Itcan connect to the monitor to view analog video.PoEPORTS /Bult-in Switch. Support PoE.The 4 PoE series product supports total 48V 50W.The 8 PoE series product supports total 48V 120W.One PoE port max supports 15W.2.2.5 NVR44/44-8P/44-16P SeriesThe NVR44 series rear panel is shown as below. See Figure 2-23.
