| 
				Model | 
			NVR-C638-64 EI
  | 
		
		
			| 
				System | 
		
		
			| 
				Main Processor | 
			
				Intel Processors | 
		
		
			| 
				Operating System | 
			
				LINUX | 
		
		
			| 
				Video& Audio | 
		
		
			| 
				IP Camera Input | 
			
				64 channel | 
		
		
			| 
				Two-way Talk | 
			
				1channel Input, 1channel Output, RCA | 
		
		
			| 
				Display | 
		
		
			| 
				Interface | 
			
				2 HDMI (up to 3840×2160), 1 VGA | 
		
		
			| 
				Resolution | 
			
				3840×2160, 1920×1080, 1280×1024, 1280×720, 1024×768 | 
		
		
			| 
				Multi-screen Display | 
			
				The 1st screen: 1/4/8/9/16/25/36 | 
		
		
			| 
				The 2nd screen: 1/4/8/9/16 | 
		
		
			| 
				OSD | 
			
				Camera title, Time, Video loss, Camera lock, Motion detection, Recording | 
		
		
			| 
				Recording | 
		
		
			| 
				Compression | 
			
				H.264/MJPEG | 
		
		
			| 
				Resolution | 
			
				12Mp, 8Mp, 6Mp, 5Mp, 3Mp, 1080P, 1.3Mp, 720P & etc. | 
		
		
			| 
				Record Rate | 
			
				256Mbps | 
		
		
			| 
				Bit Rate | 
			
				1~ 20Mbps | 
		
		
			| 
				Record Mode | 
			
				Manual, Schedule(Regular(Continuous), MD(Video detection: Motion detection, Camera blank, Video loss), Alarm), Stop | 
		
		
			| 
				Record Interval | 
			
				1~120 min (default: 60 min), Pre-record: 1~30 sec, Post-record: 10~300 sec | 
		
		
			| 
				Video Detection & Alarm | 
		
		
			| 
				Trigger Events | 
			
				Recording, PTZ, Tour, Alarm out, Video Push, Email, FTP, Snapshot, Buzzer & Screen tips | 
		
		
			| 
				Video Detection | 
			
				Motion Detection, MD Zones: 396(22×18), Video Loss & Camera Blank | 
		
		
			| 
				Alarm Input | 
			
				16ch, low level effective, green terminal interface | 
		
		
			| 
				Relay Output | 
			
				8ch, Relay contact(1A@24VDC), NO/NC programmable, green terminal interface | 
		
		
			| 
				Playback & Backup | 
		
		
			| 
				Playback | 
			
				128Mbps in Raid 5 mode 
				64Mbps in single HDD mode | 
		
		
			| 
				Search Mode | 
			
				Time/Date, Alarm, MD & Exact search (accurate to second), Smart search | 
		
		
			| 
				Playback Function | 
			
				Play, Pause, Stop, Rewind, Fast play, Slow play, Next file, Previous file, Next camera, Previous camera, Full screen, Repeat, Shuffle, Backup selection, Digital zoom | 
		
		
			| 
				Backup Mode | 
			
				USB Device/Network/Internal SATA burner/eSATA Device | 
		
		
			| 
				Network | 
		
		
			| 
				Interface | 
			
				2 RJ-45 ports (10/100/1000Mbps) | 
		
		
			| 
				Ethernet Port | 
			
				2 Ethernet ports joint working or 2 independent 1000Mbps Ethernet ports | 
		
		
			| 
				Network Function | 
			
				HTTP, TCP/IP, IPv4/IPv6, UPnP, RTSP, UDP, SMTP, NTP, DHCP, DNS, IP Filter, PPPoE, DDNS, FTP, Alarm Server, IP Search(Support Dahua IP camera, DVR, NVS and etc.) | 
		
		
			| 
				Max. User Access | 
			
				128 users | 
		
		
			| 
				Smart Phone | 
			
				iPhone, iPad, Android, Windows Phone | 
		
		
			| 
				Storage | 
		
		
			| 
				Internal HDD | 
			
				8 SATA III ports, up to 48TB | 
		
		
			| 
				HDD Mode | 
			
				Single, Raid 0/1/5/6/10/50/60 (Support global HDD hot-spare) | 
		
		
			| 
				Auxiliary Interface | 
		
		
			| 
				USB | 
			
				4 USB ports(3 USB2.0, 1 USB3.0) | 
		
		
			| 
				eSATA | 
			
				1 eSATA port | 
		
		
			| 
				RS232 | 
			
				1 port, For PC communication& keyboard | 
		
		
			| 
				RS485 | 
			
				1 port, For PTZ control | 
		
		
			| 
				General | 
		
		
			| 
				Power Supply | 
			
				AC110V~240V, 50~60Hz | 
		
		
			| 
				Power Consumption | 
			
				<40W (Without HDD) | 
		
		
			| 
				Working Environment | 
			
				-10°C~+55°C/10%~90%RH/86~106kpa | 
		
		
			| 
				Product Dimension(W×D×H) | 
			
				19" x 18" x 3.6" | 
		
		
			| 
				Product Weight | 
			
				20 lbs (without HDD) | 
		
		
			| 
				Package Dimension | 
			
				22" x 22"x 9" | 
		
		
			| 
				Package Weight | 
			
				22.35 lbs | 
		
		
			| 
				Installation | 
			
				19" Rack-mounted |