Dahua NVR21-S2 SERIES

61
Operation
System
Embedded LINUX system
System
Resources
16/32/64-channel main stream connection: max supports
160/320/320Mbps
User
Interface
WEB, local GUI
Audio
Parameters
Audio Input
1-ch MIC bidirectional talk audio input
Audio Output
2-ch MIC bidirectional talk audio output
Audio
Compression
Standard
G.711a, G.711u, PCM, G.726 (The bidirectional talk supports G.711a,
G.711u, PCM only.)
Video
Parameters
Video Input
16/32/64-ch network compression video input
Video Output
2-channel VGA
2-channel HDMI.
Video
Compression
Standard
H.264
Window Split
Mode
1/4/8/9/16/25/36/64-screen.
Alarm
Parameters
Alarm Input
16-channel
Alarm Output
6-channel relay output including one 12V DC output.
Decode
Parameters
Decode Type
MPEG4, MJPEG, H.264, H.265
Decode
Capability
H.264/H.265: 64-channel×D1, 32-channel×720P, 16-channel 1080P;
4-channel 4K.
Functions
Record Mode
Manual recording, motion detection recording, schedule recording
and alarm recording.
Priority: Manual recording>card number recording-> alarm
recording>motion detection recording>schedule recording.
Multi-Channe
l Playback
Max support 16-channel 1080P playback at the same time.
Motion
Detect
Each screen supports 396/330((PAL 22×1 8, NTSC 22×1 5) detection
zones. Various sensitivity levels.
Privacy Mask
Each channel supports 4 privacy mask zones.
Record Mode
Overwrite
Backup
Mode
Flash disk, eSATA, DVD burner.
Network
Function
Network
Protocol
IPv4/IPv6/HTTP/UPnP/NTP/SADP/SNMP/PPPoE/DNS/FTP/ONVIF(
Version 2.4)
SATA Port
4 SATA Ports
eSATA Port
1 port
RS232 Port
1 RS232 port. To debug and transmit COM data.
RS485 Port
1 RS485 port. To control peripheral PTZ and etc. Support various
protocols.
USB Port
1 USB 2.0 port at the front panel and 2 USB3.0 ports at the rear panel.