Dahua NVR21-S2 SERIES User manual

Dahua Network Video Recorder User’s Manual
V 4.3.0

I
Table of Contents
1Features and Specifications ............................................................................................................................1
1.1 Overview.....................................................................................................................................................1
1.2 Features......................................................................................................................................................1
1.3 Specifications.............................................................................................................................................2
1.3.1 NVR21-S2/NVR21-P-S2/NVR21-8P-S2 Series.............................................................................2
1.3.2 NVR1A-4P/1A-8P Series...................................................................................................................5
1.3.3 NVR21HS-S2/21HS-P-S2/21HS-8P-S2 Series.............................................................................7
1.3.4 NVR1AHS/1AHS-4P/1AHS-8P Series............................................................................................9
1.3.5 NVR41HS-W-S2 Series...................................................................................................................11
1.3.6 NVR41/41-P/41-8P/41-W Series ...................................................................................................12
1.3.7 NVR41H/41H-P/41H-8P Series .....................................................................................................14
1.3.8 NVR22-S2/22-P-S2/22-8P-S2 Series............................................................................................16
1.3.9 NVR42N Series ................................................................................................................................18
1.3.10 NVR42/42-P/42-8P Series..............................................................................................................19
1.3.11 NVR42-16P Series...........................................................................................................................21
1.3.12 NVR2A16 Series ..............................................................................................................................23
1.3.13 NVR52-4KS2/52-8P-4KS2/52-16P-4KS2 Series ........................................................................24
1.3.14 NVR44/44-8P/44-16P Series..........................................................................................................26
1.3.15 NVR54-4KS2/54-16P-4KS2 Series...............................................................................................28
1.3.16 NVR58-4KS2/58-16P-4KS2 Series...............................................................................................30
1.3.17 NVR48/48-16P Series.....................................................................................................................31
1.3.18 NVR42V-8P Series ..........................................................................................................................33
1.3.19 NVR41-4KS2/41-P-4KS2/41-8P-4KS2 Series.............................................................................35
1.3.20 NVR41HS-4KS2/ 41HS-P-4KS2/41HS-8P-4KS2 Series...........................................................37
1.3.21 NVR42-4KS2/42-P-4KS2/42-8P-4KS2/42-16P-4KS2 Series....................................................39
1.3.22 NVR5224-24P-4KS2 Series ...........................................................................................................42
1.3.23 NVR44-4KS2/44-16P-4KS2 Series...............................................................................................44
1.3.24 NVR5424-24P-4KS2 Series ...........................................................................................................46
1.3.25 NVR48-4KS2/48-16P-4KS2 Series...............................................................................................48
1.3.26 NVR21-4KS2/21-P-4KS2/21-8P-4KS2 Series.............................................................................50
1.3.27 NVR21HS-4KS2/21HS-P-4KS2/21HS-8P-4KS2 Series............................................................53
1.3.28 NVR22-4KS2/21-P-4KS2/22-8P-4KS2 Series.............................................................................56
1.3.29 NVR52-16P-4KS2E Series.............................................................................................................59
1.3.30 NVR54-16P-4KS2E Series.............................................................................................................60
1.3.31 NVR58-16P-4KS2E Series.............................................................................................................62
2Front Panel and Rear Panel..........................................................................................................................65
2.1 Front Panel...............................................................................................................................................65
2.1.1
NVR41/41-P/41-W/21-S2/21-P-S2/21-8P-S2/41-4KS2/41-P-4KS2/41-8P-4KS2/1A-4P/1A-8
P/21-4KS2/21-P-4KS2/21-8P-4KS2 Series................................................................................................65
2.1.2 NVR41H/41H-P/41H-8P Series .....................................................................................................65
2.1.3 NVR41HS-W-S2 Series...................................................................................................................66
2.1.4 NVR41-8P Series.............................................................................................................................67

II
2.1.5 NVR42/42-P/42-8P Series..............................................................................................................67
2.1.6
NVR21HS-S2/21HS-P-S2/21HS-8P-S2/41HS-4KS2/41HS-P-4KS2/41HS-8P-4KS2/1AHS/1
A HS-4P/1AHS-8P/21HS-4KS2/21HS-P-4KS2/21HS-8P-4KS2 Series .................................................69
2.1.7
NVR/22-S2/22-P-S2/22-8P-S2/42-16P/42N/52-4KS2/52-8P-4KS2/52-16P-4KS2/42-4KS2/4
2-P-4KS2/42-8P-4KS2/42-16P-4KS2/5224-24P-4KS2/54-4KS2/54-16P-4KS2/44-4KS2/44-16P-4KS
2/5424-24P-4KS2/58-4KS2/S258-16P-4KS2/48-4KS2/48-16P-4KS2/2A16/22-4KS2-22-P-4KS2-22-
8P-4KS2/52-16P-4KS2E/54-16P-4KS2E/58-16P-4KS2E Series.........................................................69
2.1.8 NVR44/44-8P/44-16P Series..........................................................................................................70
2.1.9 NVR48/48-16P Series .....................................................................................................................72
2.1.10 NVR42V-8P Series...........................................................................................................................75
2.2 Rear Panel ...............................................................................................................................................76
2.2.1 NVR41/41-P/41-8P/41-W Series ...................................................................................................76
2.2.2 NVR21-S2/21-P-S2/21-8P-S2/1A-4P/1A-8P/21-4KS2/21-P-4KS2/21-8P-4KS2 Series.......78
2.2.3 NVR41H/41H-P/41H-8P Series......................................................................................................79
2.2.4
NVR21HS-S2/21HS-P-S2/21HS-8P-S2/1AHS/1AHS-4P/1AHS-8P/21HS-4KS2/21HS-P-4K
S2/21HS-8P-4KS2 Series..............................................................................................................................80
2.2.5 NVR41HS-W-S2 Series...................................................................................................................82
2.2.6 NVR22-S2/22-P-S2/22-8P-S2/2A16/22-4KS2/22-P-4KS2/22-8P-4KS2 Series.....................83
2.2.7 NVR42/42N/42-P/42-8P/42-16P Series........................................................................................84
2.2.8 NVR52-4KS2/52-8P-4KS2/52-16P-4KS2/5224-24P-4KS2/52-16P-4KS2E Series ...............86
2.2.9 NVR44/44-8P/44-16P Series..........................................................................................................89
2.2.10 NVR54-4KS2/58-4KS2/54-16P-4KS2/58-16P-4KS2/5424-24P-4KS2/5816P-4KS2E Series
91
2.2.11 NVR48/48-16P Series .....................................................................................................................94
2.2.12 NVR42V-8P Series...........................................................................................................................96
2.2.13 NVR41-4KS2/41-P-4KS2/41-8P-4KS2.........................................................................................97
2.2.14 NVR41HS-4KS2/41HS-P-4KS2/41HS-8P-4KS2.........................................................................99
2.2.15 NVR42-4KS2/42-P-4KS2/42-8P-4KS2/42-16P-4KS2..............................................................100
2.2.16 NVR44-4KS2/44-16P-4KS2..........................................................................................................102
2.2.17 NVR48-4KS2/48-16P-4KS2 Series.............................................................................................104
2.3 Alarm Connection..................................................................................................................................106
2.3.1 Alarm Port........................................................................................................................................106
2.3.2 Alarm input port ..............................................................................................................................107
2.3.3 Alarm input and output port...........................................................................................................108
2.3.4 Alarm relay specifications .............................................................................................................108
2.4 Bidirectional talk ....................................................................................................................................108
2.4.1 Device-end to PC-end...................................................................................................................108
2.4.2 PC-end to the device-end.............................................................................................................109
2.5 Mouse Operation...................................................................................................................................109
2.6 Remote Control .....................................................................................................................................110
3Device Installation.........................................................................................................................................113
3.1 Device Installation Diagrams...............................................................................................................113

III
3.2 Check Unpacked NVR..........................................................................................................................113
3.3 About Front Panel and Rear Panel.....................................................................................................113
3.4 HDD Installation.....................................................................................................................................114
3.4.1
NVR41/41-P/41-8P/41-W/21-S2/21-P-S2/21-8P-S2/41-4KS2/41-P-4KS2/41-8P-4KS2/1A-4
P/1A-8P/21-4KS2/21-P-4KS2/21-8P-4KS2 Series..................................................................................114
3.4.2
NVR41H/41H-P/41H-8P/21HS-S2/21HS-P-S2/21HS-8P-S2/41HS-W-S2/41HS-4KS2/41HS
-P-4KS2/41HS-8P-4KS2/1AHS/1AHS-4P/1AHS-8P/21HS-4KS2/21HS-P-4KS2/21HS-8P-4KS2
Series 115
3.4.3
NVR42/42N/42-P/42-8P/42-16P/42-4K/42-8P-4K/52-4KS2/52-8P-4KS2/52-16P-4KS2/22-S
2/22-P-S2/22-8P-S2/42-4KS2/42-P-4KS2/42-8P-4KS2/42-16P-4KS2/5224-24P-4KS2/2A16/22-4KS
2/22-P-4KS2/22-8P-4KS2/52-16P-4KS2E Series....................................................................................115
3.4.4
NVR44/44-8P/44-16P/54-4KS2/54-16P-4KS2/44-4KS2/44-16P-4KS2/5424-24P-4KS2/54-1
6P-4KS2E Series..........................................................................................................................................116
3.4.5 NVR48/48-16P/58-4KS2/58-16P-4KS2/48-4KS2/48-16P-4KS2/52-16P-4KS2E Series.....116
3.4.6 NVR42V-8P Series ........................................................................................................................117
3.5 CD-ROM Installation.............................................................................................................................118
3.6 Connection Sample...............................................................................................................................119
3.6.1
NVR41/41-P/41-8P/41-W/21-S2/21-P-S2/21-8P-S2/41-4KS2/41-P-4KS2/41-8P-4KS2/1A-4
P/1A-8P/21-4KS2/21-P-4KS2/21-8P-4KS2 Series..................................................................................119
3.6.2 NVR41H/41H-P/41H-8P Series ...................................................................................................120
3.6.3 NVR41HS-W-S2 Series.................................................................................................................121
3.6.4
NVR21HS-S2/21HS-P-S2/21HS-8P-S2/41HS-4KS2/41HS-P-4KS2/41HS-8P-4KS2/1AHS/1
AHS-4P/1AHS-8P/21HS-4KS2/21HS-P-4KS2/21HS-8P-4KS2 Series................................................122
3.6.5 NVR22-S2/22-P-S2/22-8P-S2/2A16/22-4KS2/22-P-4KS2/22-8P-4KS2 Series...................123
3.6.6 NVR42N Series ..............................................................................................................................124
3.6.7
NVR42/42-P/42-8P/42-16P/52-4KS2/52-8P-4KS2/52-16P-4KS2/5224-24P-4KS2/52-16P-4
KS2E Series...................................................................................................................................................125
3.6.8 NVR42-8P-4K/42-4KS2/42-P-4KS2/42-8P-4KS2/42-16P-4KS2 Series................................125
3.6.9
NVR54-4KS2/54-16P-4KS2/58-4KS2/58-16P-4KS2/5424-24P-4KS2/54-16P-4KS2E/5816P
-4KS2E Series...............................................................................................................................................126
3.6.10 NVR44/44-8P/44-16P/44-4KS2/44-16P-4KS2 Series..............................................................127
3.6.11 NVR48/48-16P/48-4KS2/48-16P-4KS2 Series..........................................................................127
3.6.12 NVR42V-8P Series ........................................................................................................................128
4Local Basic Operation..................................................................................................................................130
4.1 Getting Started.......................................................................................................................................130
4.1.1 Boot up and Shut down.................................................................................................................130
4.1.2 Device Initialization ........................................................................................................................130
4.1.3 Reset Password..............................................................................................................................134

IV
4.1.4 Quick Settings.................................................................................................................................137
4.2 Camera...................................................................................................................................................162
4.2.1 Connection......................................................................................................................................162
4.2.2 Remote Device Initialization .........................................................................................................165
4.2.3 Short-Cut Menu to Register Camera...........................................................................................170
4.2.4 Image ...............................................................................................................................................170
4.2.5 Encode.............................................................................................................................................172
4.2.6 Channel Name................................................................................................................................176
4.2.7 Remote Upgrade............................................................................................................................177
4.2.8 Remote Device Info........................................................................................................................178
4.3 Preview...................................................................................................................................................180
4.3.1 Preview............................................................................................................................................180
4.3.2 Navigation bar.................................................................................................................................180
4.3.3 Preview Control Interface..............................................................................................................183
4.3.4 Right Click Menu ............................................................................................................................185
4.3.5 Edit View (Sequence)....................................................................................................................187
4.3.6 Preview Display Effect Setup .......................................................................................................189
4.3.7 Fisheye (Optional)..........................................................................................................................196
4.4 PTZ..........................................................................................................................................................198
4.4.1 PTZ Settings....................................................................................................................................198
4.4.2 PTZ Control.....................................................................................................................................200
4.5 Record File.............................................................................................................................................205
4.6 Playback and Search............................................................................................................................205
4.6.1 Instant Playback.............................................................................................................................205
4.6.2 Search Interface.............................................................................................................................205
4.6.3 Smart Search Playback.................................................................................................................213
4.6.4 Mark Playback ................................................................................................................................214
4.6.5 Playback Image..............................................................................................................................215
4.6.6 Splice Playback...............................................................................................................................215
4.6.7 Smart Playback...............................................................................................................................216
4.6.8 File List.............................................................................................................................................221
4.6.9 Other Aux Functions.....................................................................................................................223
4.7 Event Manager ......................................................................................................................................223
4.7.1 Video Detect....................................................................................................................................223
4.7.2 Smart Plan.......................................................................................................................................230
4.7.3 IVS (General Behavior Analytics) (Optional)..............................................................................232
4.7.4 Face Detect (Optional)...................................................................................................................251
4.7.5 People Counting (Optional)...........................................................................................................252
4.7.6 Heat Map.........................................................................................................................................253
4.7.7 Plate Recognition...........................................................................................................................255
4.7.8 Audio Detect (Optional).................................................................................................................257
4.7.9 Alarm Settings.................................................................................................................................258
4.7.10 Abnormality......................................................................................................................................263
4.7.11 Alarm output....................................................................................................................................265
4.7.12 POS..................................................................................................................................................266
4.8 Network...................................................................................................................................................270

V
4.8.1 Network Settings ............................................................................................................................270
4.8.2 Network Test....................................................................................................................................289
4.9 Storage ...................................................................................................................................................291
4.9.1 Basic.................................................................................................................................................291
4.9.2 Schedule..........................................................................................................................................292
4.9.3 HDD..................................................................................................................................................292
4.9.4 FTP...................................................................................................................................................293
4.9.5 Record Control................................................................................................................................294
4.9.6 HDD Information.............................................................................................................................295
4.9.7 HDD Group......................................................................................................................................297
4.9.8 HDD Detect.....................................................................................................................................297
4.9.9 RAID Manager................................................................................................................................300
4.10 Device Maintenance and Manager.....................................................................................................302
4.10.1 Account............................................................................................................................................302
4.10.2 System Info......................................................................................................................................311
4.10.3 Voice.................................................................................................................................................314
4.10.4 RS232..............................................................................................................................................316
4.10.5 Broadcast.........................................................................................................................................318
4.10.6 Security............................................................................................................................................320
4.10.7 Auto Maintain..................................................................................................................................322
4.10.8 Backup.............................................................................................................................................322
4.10.9 Default..............................................................................................................................................326
4.10.10 Upgrade.......................................................................................................................................327
4.11 Logout /Shutdown/Restart ...................................................................................................................329
5Web Operation...............................................................................................................................................330
5.1 General Introduction.............................................................................................................................330
5.1.1 Preparation......................................................................................................................................330
5.2 Device Initialization...............................................................................................................................330
5.2.1 Log in................................................................................................................................................333
5.3 Reset Password ....................................................................................................................................334
5.4 LAN Mode...............................................................................................................................................335
5.5 Real-time Monitor..................................................................................................................................337
5.6 PTZ..........................................................................................................................................................338
5.7 Image/Alarm-out....................................................................................................................................339
5.7.1 Image ...............................................................................................................................................340
5.7.2 Alarm output....................................................................................................................................340
5.8 Zero-channel Encode...........................................................................................................................340
5.9 WAN Login.............................................................................................................................................341
5.10 Setup.......................................................................................................................................................342
5.10.1 Camera............................................................................................................................................342
5.10.2 Network............................................................................................................................................354
5.10.3 Event................................................................................................................................................372
5.10.4 Storage.............................................................................................................................................400
5.10.5 Setting..............................................................................................................................................408
5.11 Information .............................................................................................................................................430
5.11.1 Version.............................................................................................................................................430

VI
5.11.2 Log....................................................................................................................................................430
5.11.3 Online User......................................................................................................................................431
5.11.4 People Counting.............................................................................................................................432
5.11.5 Heat Map.........................................................................................................................................432
5.11.6 HDD..................................................................................................................................................433
5.12 Playback.................................................................................................................................................433
5.12.1 Search Record................................................................................................................................434
5.12.2 File List.............................................................................................................................................434
5.12.3 Playback ..........................................................................................................................................435
5.12.4 Download.........................................................................................................................................435
5.12.5 Load more........................................................................................................................................436
5.13 Smart Playback .....................................................................................................................................438
5.13.1 IVS (Behavior Analytics)................................................................................................................439
5.13.2 Plate recognition.............................................................................................................................440
5.13.3 Human Face....................................................................................................................................441
5.14 Alarm.......................................................................................................................................................442
5.15 Log out....................................................................................................................................................443
5.16 Un-install Web Control..........................................................................................................................444
6Glossary..........................................................................................................................................................445
7FAQ.................................................................................................................................................................446
8Appendix A HDD Capacity Calculation ......................................................................................................451
9Appendix B Compatible Network Camera List..........................................................................................452

VII
Copyrights
© 2017 Dahua Vision Technology.All rights reserved.
Any or full contents of the user’s manual cannot be copied, transmitted, distributed, partially or wholly,
by any means, without the prior written notice of Dahua Vision Technology (herein after “Dahua”).
Dahua or the third party may reserve the right of the product described in this user’s manual. Without
the prior written approval of the corresponding party, any person cannot (including but not limited to)
copy, distribute, amend, reverse compile, disassemble, engineering, rent, reverse engineer, reverse
compile or disassemble the software.
Trademark
, , are the trademarks or registered trademarks of the Dahua in various
jurisdictions.
Other trademarks and registered trademarks mentioned are the properties of their respective
owners.

VIII
Welcome
Thank you for purchasing our network video recorder!
This user’s manual is designed to be a reference tool for your system.
Please open the accessory bag to check. Contact your local retailer ASAP if something is missing or
damaged in the bag.

IX
Cybersecurity Recommendations
Cybersecurity Recommendations
Mandatory actions to be taken towards cybersecurity
1. Change Passwords and Use Strong Passwords:
The number one reason systems get “hacked” is due to having weak or default passwords. It is
recommended to change default passwords immediately and choose a strong password whenever
possible. A strong password should be made up of at least 8 characters and a combination of special
characters, numbers, and upper and lower case letters.
2. Update Firmware
As is standard procedure in the tech-industry, we recommend keeping NVR, NVR, and IP camera
firmware up-to-date to ensure the system is current with the latest security patches and fixes.
“Nice to have” recommendations to improve your network security
1. Change Passwords Regularly
Regularly change the credentials to your devices to help ensure that only authorized users are able to
access the system.
2. Change Default HTTP and TCP Ports:
● Change default HTTP and TCP ports for systems. These are the two ports used to communicate and to
view video feeds remotely.
● These ports can be changed to any set of numbers between 1025-65535. Avoiding the default ports
reduces the risk of outsiders being able to guess which ports you are using.
3. Enable HTTPS/SSL:
Set up an SSL Certificate to enable HTTPS. This will encrypt all communication between your devices
and recorder.
4. Enable IP Filter:
Enabling your IP filter will prevent everyone, except those with specified IP addresses, from accessing
the system.
5. Change ONVIF Password:
On older IP Camera firmware, the ONVIF password does not change when you change the system’s
credentials. You will need to either update the camera’s firmware to the latest revision or manually
change the ONVIF password.
6. Forward Only Ports You Need:
● Only forward the HTTP and TCP ports that you need to use. Do not forward a huge range of numbers to
the device. Do not DMZ the device's IP address.

X
● You do not need to forward any ports for individual cameras if they are all connected to a recorder on
site; just the NVR is needed.
7. Disable Auto-Login on SmartPSS:
Those using SmartPSS to view their system and on a computer that is used by multiple people should
disable auto-login. This adds a layer of security to prevent users without the appropriate credentials from
accessing the system.
8. Use a Different Username and Password for SmartPSS:
In the event that your social media, bank, email, etc. account is compromised, you would not want
someone collecting those passwords and trying them out on your video surveillance system. Using a
different username and password for your security system will make it more difficult for someone to guess
their way into your system.
9. Limit Features of Guest Accounts:
If your system is set up for multiple users, ensure that each user only has rights to features and functions
they need to use to perform their job.
10. UPnP:
● UPnP will automatically try to forward ports in your router or modem. Normally this would be a good
thing. However, if your system automatically forwards the ports and you leave the credentials defaulted,
you may end up with unwanted visitors.
● If you manually forwarded the HTTP and TCP ports in your router/modem, this feature should be turned
off regardless. Disabling UPnP is recommended when the function is not used in real applications.
11. SNMP:
Disable SNMP if you are not using it. If you are using SNMP, you should do so only temporarily, for tracing
and testing purposes only.
12. Multicast:
Multicast is used to share video streams between two recorders. Currently there are no known issues
involving Multicast, but if you are not using this feature, deactivation can enhance your network security.
13. Check the Log:
If you suspect that someone has gained unauthorized access to your system, you can check the system
log. The system log will show you which IP addresses were used to login to your system and what was
accessed.
14. Physically Lock Down the Device:
Ideally, you want to prevent any unauthorized physical access to your system. The best way to achieve
this is to install the recorder in a lockbox, locking server rack, or in a room that is behind a lock and key.
15. Connect IP Cameras to the PoE Ports on the Back of an NVR:
Cameras connected to the PoE ports on the back of an NVR are isolated from the outside world and

XI
cannot be accessed directly.
16. Isolate NVR and IP Camera Network
The network your NVR and IP camera resides on should not be the same network as your public
computer network. This will prevent any visitors or unwanted guests from getting access to the same
network the security system needs in order to function properly.

XII
Important Safeguards and Warnings
1．Electrical safety
All installation and operation here should conform to your local electrical safety codes.
An apparatus with CLASS I construction shall be connected to a MAINS socket outlet with a
protective earthing connection.
Use a power supply which meets the requirements for SELV (Safety Extra Low Voltage) and
complies with Limited Power Source according to IEC 60950-1. Refer to the device label for detailed
information.
The product must be grounded to reduce the risk of electric shock.
We assume no liability or responsibility for all the fires or electric shock caused by improper handling
or installation.
2．Transportation security
Heavy stress, violent vibration or water splash are not allowed during transportation, storage and
installation.
3．Installation
Keep upwards. Handle with care.
Do not apply power to the NVR before completing installation.
Do not place objects on the NVR.
4．Qualified engineers needed
All the examination and repair work should be done by the qualified service engineers.
We are not liable for any problems caused by unauthorized modifications or attempted repair.
5．Environment
The NVR should be installed in a cool, dry place away from direct sunlight, inflammable, explosive
substances and etc.
This series product shall be transported, storage and used in the specified environments.
Environment which needs to comply with the following conditions:
The function of the ITE being investigated to IEC 60950-1 is considered not likely to require
connection to an Ethernet network with outside plant routing, including campus environment.
The installation instructions clearly state that the ITE is to be connected only to PoE networks without
routing to the outside plant.
6. Accessories
Be sure to use all the accessories recommended by manufacturer.
Before installation, please open the package and check all the components are included.
Contact your local retailerASAP if something is broken in your package.
7. Lithium battery
Improper battery use may result in fire, explosion, or personal injury!
When replace the battery, please make sure you are using the same model!

XIII
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
Standards Approvals
For our Wi-Fi series product such as NVR41HS-W-S2, please refer to the following important notices.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired
operation.
Safety Instruction
Icon
Note
DANGER
Indicates a hazard with a high level of risk, which if not avoided, will
result in death or serious injury.
WARNING
Indicates a potentially hazardous situation, which if not avoided,
could result in serious device damage or person injury.
CAUTION
Indicates a potentially hazardous situation, which if not avoided,
could result in device damage, data loss, performance degradation,
or unexpected results.
Anti-static
Indicates it is the static sensitive device.
Electric shock
risk
Indicates presence of dangerous high voltage. There is a risk of
electric shock to persons.
High power
laser radiation risk
Indicates presence of high power laser radiation.
Tips
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1 Features and Specifications
1.1 Overview
This series NVR is a high performance network video recorder. This series product support local preview,
multiple-window display, recorded file local storage, remote control and mouse shortcut menu operation,
and remote management and control function.
This series product supports center storage, front-end storage and client-end storage. The monitor zone
in the front-end can be set in anywhere. Working with other front-end devices such as IPC, NVS, this
series product can establish a strong surveillance network via the CMS. In the network system, there is
only one network cable from the monitor center to the monitor zone in the whole network. There is no
audio/video cable from the monitor center to the monitor zone. The whole project is featuring of simple
connection, low-cost, low maintenance work.
This series NVR can be widely used in many areas such as public security, water conservancy,
transportation and education.
1.2 Features
Cloud
Upgrade
For the NVR connected with the Internet, it supports online upgrade to
update applications.
Real-time
Surveillance
VGA, HDMI port. Connect to monitor to realize real-time surveillance.
Some series support TV/VGA/HDMI output at the same time.
Short-cut menu when preview.
Support popular PTZ decoder control protocols. Support preset, tour
and pattern.
Playback
Support each channel real-time record independently, and at the same
time it can support search, forward play, network monitor, record search,
download and etc.
Support various playback modes: slow play, fast play, backward play
and frame by frame play.
Support time title overlay so that you can view event accurate occurred
time
Support specified zone enlargement.
User
Management
Each group has different management powers that can be edited freely.
Every user belongs to an exclusive group.
Storage
Via corresponding setup (such as alarm setup and schedule setup), you
can backup related audio/video data in the network video recorder.
Support Web record and record local video and storage the file in the
client end.
Alarm
Respond to external alarm simultaneously (within 200MS), based on
user’s pre-defined relay setup, system can process the alarm input
correctly and prompt user by screen and voice (support pre-recorded
audio).
Support central alarm server setup, so that alarm information can
remotely notify user automatically. Alarm input can be derived from

2
various connected peripheral devices.
Alert you via email/sms.
Network
Monitor
Through network, sending audio/video data compressed by IPC or NVS
to client-ends, then the data will be decompressed and display.
Support max 128 connections at the same time.
Transmit audio/video data by HTTP, TCP, UDP, MULTICAST,
RTP/RTCP and etc.
Transmit some alarm data or alarm info by SNMP.
Support WEB access in WAN/LAN.
Window Split
Adopt the video compression and digital process to show several
windows in one monitor. Support 1/4/8/9/16/ 25/36-window display when
preview and 1/4/9/16-window display when playback.
Record
Support normal/motion detect/alarm record function. Save the recorded
files in the HDD, USB device, client-end PC, or network storage server.
You can search or playback the saved files at the local-end or via the
Web/USB device.
Backup
Support network backup, USB2.0 record backup function, the recorded
files can be saved in network storage server, peripheral USB2.0
device, burner and etc.
Network
Management
Supervise NVR configuration and control power via Ethernet.
Support management via WEB.
Peripheral
Equipment
Management
Support peripheral equipment management such as protocol setup and
port connection.
Support transparent data transmission such as RS232 (RS-422), RS485
(RS-485).
Auxiliary
Support switch between NTSC and PAL.
Support real-time system resources information and running statistics
display.
Support log file.
Local GUI output. Shortcut menu operation via mouse.
IR control function (For some series product only.). Shortcut menu
operation via remote control.
Play the video/audio from the network camera or NVS remotely.
1.3 Specifications
1.3.1 NVR21-S2/NVR21-P-S2/NVR21-8P-S2 Series
Model
21-S2 Series
21-P-S2 Series
21-8P-S2 Series
System
System
Resources
4/8/16-ch series
product support
4/8/16 HD
connection
respectively. Total
bandwidth supports
80Mbps.
4/8-ch series product support 4/8 HD
connection respectively. Total bandwidth
supports 80Mbps.
OS
Embedded Linux real-time operation system

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Model
21-S2 Series
21-P-S2 Series
21-8P-S2 Series
Operation
Interface
WEB/Local GUI
Decode
Video Decode
Type
H.264
Decode
Capability
Max 4-ch 1080P 30fps or 8-ch 720P 30fps or 8-ch D1 30fps
Video
Video Input
4/8/16-ch network
compression video
input
4/8-ch network compression video input
Video Output
1-channel VGA analog video output
HDMI
1-ch HDMI output. Version number is 1.4
Window Split
1/4/8/9/16-window
1/4/8/9-window
Audio
Audio Input
1-ch bidirectional talk input
Audio Output
1-ch bidirectional talk output
Audio
Compression
Standard
G.711a
Alarm
Alarm Input
N/A
Alarm Output
N/A
Function
Storage
1 built-in SATA port
Multiple-Chann
el Playback
Max 8-channel D1 or 8-channel 720P or 4-channel 1080P playback

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Model
21-S2 Series
21-P-S2 Series
21-8P-S2 Series
Port and
Indicator
RS232 Port
N/A
RS485 Port
N/A
USB Port
2 peripheral USB2.0 ports.
Network
Connection
1 RJ45 10/100Mbps self-adaptive Ethernet port.
PoE
N/A
4
8
Power Port
1 power socket.
Power adapter
power supplying
mode. DC 12V
power.
1 power socket.
Power adapter
power supplying
mode. DC 48V
power.
1 power socket.
Power adapter
power supplying
mode. DC 48V
power.
Power Button
N/A
Power On-off
Button
N/A
IR Receiver
Window
N/A
Clock
Built-in clock.
Indicator Light
One power status indicator light.
One network status indicator light.
One HDD status indicator light.
General
Power
Consumption
＜10W (No HDD)
Working
Temperature
﹣10℃～﹢55℃
Working
Humidity
10℅～90℅
Air pressure
86kPa～106kPa
Dimension
205mm×206.75mm×
205mm×206.75mm×
425mm×95mm×260

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Model
21-S2 Series
21-P-S2 Series
21-8P-S2 Series
45.2mm
45.2mm
mm
Weight
0.5kg～2kg (No HDD)
Installation
Mode
Desk installation
1.3.2 NVR1A-4P/1A-8P Series
Model
NVR1A-4P Series
NVR1A-8P Series
System
System
Resources
4/8-ch series product support 4/8 HD connection respectively. Total
bandwidth supports 80Mbps.
OS
Embedded Linux real-time operation system
Operation
Interface
WEB/Local GUI
Decode
Video Decode
Type
Smart H.264+/H.264
Decode
Capability
Max 4-ch 1080P 30fps or 8-ch 720P 30fps or 8-ch D1 30fps
Video
Video Input
4/8-ch network compression video input
Video Output
1-channel VGA analog video output
HDMI
1-ch HDMI output. Version number is 1.4
Window Split
1/4/8/9-window
Audio
Audio Input
1-ch bidirectional talk input
Audio Output
1-ch bidirectional talk output

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Model
NVR1A-4P Series
NVR1A-8P Series
Audio
Compression
Standard
G.711a
Alarm
Alarm Input
N/A
Alarm Output
N/A
Function
Storage
1 built-in SATA port
Multiple-Chann
el Playback
Max 8-channel D1 or 8-channel 720P or 4-channel 1080P playback
Port and
Indicator
RS232 Port
N/A
RS485 Port
N/A
USB Port
2 peripheral USB2.0 ports.
Network
Connection
1 RJ45 10/100Mbps self-adaptive Ethernet port.
PoE
4
8
Power Port
1 power socket. Power adapter
power supplying mode. DC 48V
power.
1 power socket. Power adapter
power supplying mode. DC 48V
power.
Power Button
N/A
Power On-off
Button
N/A
IR Receiver
Window
N/A
Clock
Built-in clock.