Dahua Technology NVR41 Series User manual

P
Network Video Recorder
User’s Manual
V4.4.9
ZHEJIANG DAHUA VISION TECHNOLOGY CO., LTD.

Foreword I
Foreword
General
This manual introduces the functions and operations of the NVR device (hereinafter referred to
as "the Device").
Safety Instructions
The following categorized signal words with defined meaning might appear in the Manual.
Signal Words
Meaning
DANGER
Indicates a high potential hazard which, if not avoided, will result
in death or serious injury.
WARNING
Indicates a medium or low potential hazard which, if not avoided,
could result in slight or moderate injury.
CAUTION
Indicates a potential risk which, if not avoided, could result in
property damage, data loss, lower performance, or unpredictable
result.
TIPS
Provides methods to help you solve a problem or save you time.
NOTE
Provides additional information as the emphasis and supplement
to the text.
Revision History
Version
Revision Content
Release Time
V4.4.9
Add Wi-Fi module and repeater.
December, 2019
V4.4.8
Add new models and security center.
November, 2019
V4.4.7
Add new models.
September, 2019

Foreword II
Version
Revision Content
Release Time
V4.4.6
New UI interfaces and menu tree.
New AI functions.
July, 2019
V4.4.5
Deletes specifications
June, 2019
V4.4.4
Add models: Cooper 1U (S3), Cooper 1U
(S3) with 4 PoE Ports, Compact 1U (S3)
with 8 PoE Ports Series.
August, 2018
V4.4.3
Add Compact 1U 4K(S2) with Wireless and
Smart 1U 4K(S2) with Wireless. Add Wi-Fi
AP and Repeater functions.
4K 1.5U (S2) with 24 PoE ports: Add
altitude 5,000 meters.
July, 2018
V4.4.2
Add GDPR information.
Add FCC information.
Update HDD installation.
June, 2018
V4.3.2
Add Privacy Protection Notice and update
About the Manual.
May, 2018
V4.3.1
Add new models and update relevant
information.
April, 2018
V4.3.0
Delete old models and add new models. Update
relevant information.
October, 2017
V4.2.0
Add models.
September, 2017
V4.1.0
Update POS.
Modify pictures with QR code and SN.
September, 2017
V4.0.0
Add cloud update module.
Baseline switch and update screen
interfaces.
August, 2017
V3.0.0
Add new modules.
Baseline switch and update screen
interfaces.
Add new models.
May, 2016
V1.0.0
First release.
-
About the Manual
The manual is for reference only. If there is inconsistency between the manual and the
actual product, the actual product shall prevail.
We are not liable for any loss caused by the operations that do not comply with the manual.

Foreword III
The manual would be updated according to the latest laws and regulations of related
regions. For detailed information, see the paper manual, CD-ROM, QR code or our official
website. If there is inconsistency between paper manual and the electronic version, the
electronic version shall prevail.
All the designs and software are subject to change without prior written notice. The product
updates might cause some differences between the actual product and the manual. Please
contact the customer service for the latest program and supplementary documentation.
There still might be deviation in technical data, functions and operations description, or
errors in print. If there is any doubt or dispute, please refer to our final explanation.
Upgrade the reader software or try other mainstream reader software if the manual (in PDF
format) cannot be opened.
All trademarks, registered trademarks and the company names in the manual are the
properties of their respective owners.
Please visit our website, contact the supplier or customer service if there is any problem
occurred when using the device.
If there is any uncertainty or controversy, please refer to our final explanation.

Important Safeguards and Warnings IV
Important Safeguards and Warnings
The following description is the correct application method of the device. Read the manual
carefully before use to prevent danger and property loss. Strictly conform to the manual
during application and keep it properly after reading.
Operating Requirement
Install the PoE front-end device indoors.
The device does not support wall mount.
Do not place and install the device in an area exposed to direct sunlight or near heat
generating device.
Do not install the device in a humid, dusty or fuliginous area.
Keep its horizontal installation, or install it at stable places, and prevent it from falling.
Do not drip or splash liquids onto the device; do not put on the device anything filled with
liquids, in order to prevent liquids from flowing into the device.
Install the device at well-ventilated places; do not block its ventilation opening.
Use the device only within rated input and output range.
Do not dismantle the device arbitrarily.
Transport, use and store the device within allowed humidity and temperature range.
Power Requirement
Make sure to use the designated battery type. Otherwise there may be explosion risk.
Make sure to use batteries according to requirements. Otherwise, it may result in fire,
explosion or burning risks of batteries!
To replace batteries, only the same type of batteries can be used.
Make sure to dispose the exhausted batteries according to the instructions.
The product shall use electric wires (power wires) recommended by this area, which shall
be used within its rated specification.
Make sure to use standard power adapter matched with this device. Otherwise, the user
shall undertake resulting personnel injuries or device damages.

Important Safeguards and Warnings V
Use power supply that meets SELV (safety extra low voltage) requirements, and supply
power with rated voltage that conforms to Limited Power Source in IEC60950-1. For
specific power supply requirements, please refer to device labels.
Products with category I structure shall be connected to grid power output socket, which is
equipped with protective grounding.
Appliance coupler is a disconnecting device. During normal use, please keep an angle that
facilitates operation.

Table of Contents VI
Table of Contents
Foreword.......................................................................................................................................................I
Important Safeguards and Warnings..........................................................................................................IV
Table of Contents........................................................................................................................................VI
1 Features................................................................................................................................................1
1.1 Overview........................................................................................................................................1
1.2 Features.........................................................................................................................................1
2 Front Panel and Rear Panel.................................................................................................................3
2.1 Front Panel....................................................................................................................................3
2.1.1
NVR41/41-P/41-W/41-4KS2/41-P-4KS2/21-S2/21-P-S2/21-8P-S2/41-4KS2/41-P-4KS2/41-
8P-4KS2/21-4KS2/21-P-4KS2/21-8P-4KS2 Series .............................................................................3
2.1.2 NVR41H/41H-P/41H-8P Series..............................................................................................3
2.1.3 NVR41HS-W-S2 Series..........................................................................................................4
2.1.4 NVR41-8P Series....................................................................................................................5
2.1.5 NVR41-8P-4KS2/L Series.......................................................................................................5
2.1.6 NVR42/42-P/42-8P Series......................................................................................................6
2.1.7
NVR21HS-S2/21HS-P-S2/21HS-8P-S2/41HS-4KS2/41HS-P-4KS2/41HS-8P-4KS2/21HS-4
KS2/21HS-P-4KS2/21HS-8P-4KS2 Series..........................................................................................8
2.1.8
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-4KS2/22-4KS2/22-P-4KS2/22-8P-4K
S2/52-8P-4KS2E/52-16P-4KS2E/54-16P-4KS2E/58-16P-4KS2E Series...........................................9
2.1.9 NVR44/44-8P/44-16P Series................................................................................................10
2.1.10 NVR48/48-16P Series.......................................................................................................12
2.1.11 NVR42V-8P Series................................................................................................................14
2.1.12 NVR21-W-4KS2 Series.....................................................................................................15
2.1.13 NVR21HS-W-4KS2 Series................................................................................................16
2.1.14 NVR11 HC-S3 Series........................................................................................................17
2.1.15 NVR1104HS-W/NVR1108HS-W Series............................................................................17
2.2 Rear Panel...................................................................................................................................18
2.2.1 NVR41/41-P/41-8P/41-W Series ..........................................................................................18
2.2.2 NVR21-S2/21-P-S2/21-8P-S2/21-4KS2/21-P-4KS2/21-8P-4KS2 Series............................20
2.2.3 NVR41H/41H-P/41H-8P Series............................................................................................21
2.2.4 NVR21HS-S2/21HS-P-S2/21HS-8P-S2/21HS-4KS2/21HS-P-4KS2/21HS-8P-4KS2
Series…..............................................................................................................................................22
2.2.5 NVR41HS-W-S2 Series........................................................................................................24
2.2.6 NVR22-S2/22-P-S2/22-8P-S2/22-4KS2/22-P-4KS2/22-8P-4KS2 Series............................25

Table of Contents VII
2.2.7 NVR42/42N/42-P/42-8P/42-16P Series................................................................................26
2.2.8 NVR52-4KS2/52-8P-4KS2/52-16P-4KS2/5224-24P-4KS2/52-8P-4KS2E/52-16P-4KS2E
Series…..............................................................................................................................................28
2.2.9 NVR44/44-8P/44-16P Series................................................................................................30
2.2.10
NVR54-4KS2/58-4KS2/54-16P-4KS2/58-16P-4KS2/5424-24P-4KS2/5816P-4KS2E Series
…………..............................................................................................................................................33
2.2.11 NVR48/48-16P Series...........................................................................................................35
2.2.12 NVR42V-8P Series............................................................................................................37
2.2.13 NVR41-4KS2/41-P-4KS2/41-8P-4KS2.............................................................................39
2.2.14 NVR41HS-4KS2/41HS-P-4KS2/41HS-8P-4KS2..............................................................40
2.2.15 NVR42-4KS2/42-P-4KS2/42-8P-4KS2/42-16P-4KS2......................................................42
2.2.16 NVR44-4KS2/44-16P-4KS2..............................................................................................44
2.2.17 NVR48-4KS2/48-16P-4KS2 Series ..................................................................................46
2.2.18 NVR21-W-4KS2 Series.....................................................................................................48
2.2.19 NVR21HS-W-4KS2 Series................................................................................................49
2.2.20 NVR11 HC-S3 Series........................................................................................................50
2.2.21 NVR1104HS-W/NVR1108HS-W Series............................................................................51
2.3 Alarm Connection........................................................................................................................53
2.3.1 Alarm Port .............................................................................................................................53
2.3.2 Alarm input port.....................................................................................................................53
2.3.3 Alarm input and output port...................................................................................................54
2.3.4 Alarm relay specifications .....................................................................................................54
2.4 Bidirectional talk ..........................................................................................................................56
2.4.1 Device-end to PC-end...........................................................................................................56
2.4.2 PC-end to the device-end.....................................................................................................56
2.5 Mouse Operation.........................................................................................................................57
2.6 Remote Control ...........................................................................................................................58
3 Device Installation...............................................................................................................................60
3.1 Device Installation Diagrams.......................................................................................................60
3.2 Check Unpacked NVR.................................................................................................................60
3.3 About Front Panel and Rear Panel.............................................................................................61
3.4 HDD Installation...........................................................................................................................61
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-4KS2/21-4
KS2/21-P-4KS2/21-8P-4KS2/21-W-4KS2 Series ..............................................................................61
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-4KS2/21HS-4KS2/21HS-P-4KS2/21HS-8P-4KS2/21HS-W-4KS2 Series..........62
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-4KS2/22-4KS2/22-
P-4KS2/22-8P-4KS2/52-8P-4KS2E/52-16P-4KS2E Series...............................................................62
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................................................................................................................................63

Table of Contents VIII
3.4.5 NVR48/48-16P/58-4KS2/58-16P-4KS2/48-4KS2/48-16P-4KS2/52-16P-4KS2E Series.....63
3.4.6 NVR42V-8P Series ...............................................................................................................64
3.5 CD-ROM Installation....................................................................................................................65
3.6 Connection Sample.....................................................................................................................67
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-4KS2/21-4
KS2/21-P-4KS2/21-8P-4KS2 Series..................................................................................................67
3.6.2 NVR41H/41H-P/41H-8P Series............................................................................................67
3.6.3 NVR41HS-W-S2/21-W-4KS2/21HS-W-4KS2 Series ...........................................................68
3.6.4
NVR21HS-S2/21HS-P-S2/21HS-8P-S2/41HS-4KS2/41HS-P-4KS2/41HS-8P-4KS2/21HS-4
KS2/21HS-P-4KS2/21HS-8P-4KS2 Series........................................................................................69
3.6.5 NVR22-S2/22-P-S2/22-8P-S2/22-4KS2/22-P-4KS2/22-8P-4KS2 Series............................69
3.6.6 NVR42N Series.....................................................................................................................69
3.6.7
NVR42/42-P/42-8P/42-16P/52-4KS2/52-8P-4KS2/52-16P-4KS2/5224-24P-4KS2/52-8P-4K
S2E/52-16P-4KS2E Series.................................................................................................................70
3.6.8 NVR42-8P-4K/42-4KS2/42-P-4KS2/42-8P-4KS2/42-16P-4KS2 Series ..............................70
3.6.9
NVR54-4KS2/54-16P-4KS2/58-4KS2/58-16P-4KS2/5424-24P-4KS2/54-16P-4KS2E/5816P
-4KS2E Series....................................................................................................................................71
3.6.10 NVR44/44-8P/44-16P/44-4KS2/44-16P-4KS2 Series......................................................71
3.6.11 NVR48/48-16P/48-4KS2/48-16P-4KS2 Series.....................................................................72
3.6.12 NVR42V-8P Series...........................................................................................................72
4 Local Basic Operation.........................................................................................................................74
4.1 Getting Started ............................................................................................................................74
4.1.1 Boot up..................................................................................................................................74
4.1.2 Device Initialization ...............................................................................................................74
4.1.3 Reset Password....................................................................................................................77
4.1.4 Quick Settings.......................................................................................................................84
4.2 Camera......................................................................................................................................107
4.2.1 Connection..........................................................................................................................107
4.2.2 Remote Device Initialization.................................................................................................111
4.2.3 Short-Cut Menu to Register Camera ..................................................................................115
4.2.4 Image...................................................................................................................................115
4.2.5 Encode................................................................................................................................118
4.2.6 Channel Name ....................................................................................................................121
4.2.7 Remote Upgrade.................................................................................................................121
4.2.8 Remote Device Info.............................................................................................................122
4.3 Live View...................................................................................................................................124
4.3.1 Preview................................................................................................................................124
4.3.2 Navigation bar.....................................................................................................................125
4.3.3 Preview Control Interface....................................................................................................127
4.3.4 Wireless Pairing ..................................................................................................................132
4.3.5 Sequence ............................................................................................................................133
4.3.6 Fisheye (Optional)...............................................................................................................135

Table of Contents IX
4.3.7 Test Temperature.................................................................................................................138
4.3.8 AI Preview Mode.................................................................................................................139
4.4 PTZ............................................................................................................................................141
4.4.1 PTZ Settings........................................................................................................................141
4.4.2 PTZ Control.........................................................................................................................143
4.4.3 Configuring PTZ Functions .................................................................................................145
4.4.4 Calling PTZ Functions.........................................................................................................147
4.5 Record File................................................................................................................................148
4.6 Playback and Search ................................................................................................................148
4.6.1 Instant Playback..................................................................................................................148
4.6.2 Search Interface..................................................................................................................148
4.6.3 Smart Search Playback.......................................................................................................153
4.6.4 Mark Playback.....................................................................................................................153
4.6.5 Playback Image...................................................................................................................155
4.6.6 Splice Playback...................................................................................................................155
4.6.7 File List................................................................................................................................155
4.6.8 Other Aux Functions ..........................................................................................................157
4.7 AI ...............................................................................................................................................157
4.7.1 AI Search.............................................................................................................................157
4.7.2 Parameters..........................................................................................................................171
4.7.3 Database.............................................................................................................................204
4.8 Event Manager..........................................................................................................................211
4.8.1 Alarm Info............................................................................................................................ 211
4.8.2 Alarm Status........................................................................................................................211
4.8.3 Alarm Input..........................................................................................................................212
4.8.4 Alarm Control ......................................................................................................................214
4.8.5 Video Detection...................................................................................................................215
4.8.6 Audio Detect........................................................................................................................223
4.8.7 Thermal Alarm.....................................................................................................................225
4.8.8 Abnormality .........................................................................................................................228
4.9 POS...........................................................................................................................................230
4.9.1 Search.................................................................................................................................230
4.9.2 Settings................................................................................................................................231
4.10 Operation and Maintenance......................................................................................................234
4.10.1 Log ..................................................................................................................................234
4.10.2 System ............................................................................................................................235
4.10.3 Network...........................................................................................................................239
4.10.4 Maintenance and Management......................................................................................242
4.11 File Backup................................................................................................................................249
4.12 Network......................................................................................................................................250
4.12.1 TCP/IP.............................................................................................................................250
4.12.2 Port..................................................................................................................................251
4.12.3 Wi-Fi AP ..........................................................................................................................252
4.12.4 Repeater..........................................................................................................................254
4.12.5 PPPoE.............................................................................................................................256
4.12.6 DDNS..............................................................................................................................257

Table of Contents X
4.12.7 UPnP...............................................................................................................................258
4.12.8 Email ...............................................................................................................................260
4.12.9 SNMP..............................................................................................................................262
4.12.10 Multicast..........................................................................................................................264
4.12.11 Alarm Center...................................................................................................................265
4.12.12 Register...........................................................................................................................265
4.12.13 P2P..................................................................................................................................266
4.13 Storage......................................................................................................................................268
4.13.1 Basic................................................................................................................................268
4.13.2 Schedule .........................................................................................................................269
4.13.3 HDD.................................................................................................................................269
4.13.4 Record Control................................................................................................................270
4.13.5 Advance (HDD Group)....................................................................................................270
4.13.6 HDD Detect.....................................................................................................................271
4.13.7 RAID................................................................................................................................274
4.13.8 Record Estimate..............................................................................................................279
4.13.9 FTP..................................................................................................................................281
4.14 System.......................................................................................................................................283
4.14.1 General............................................................................................................................283
4.14.2 RS232 .............................................................................................................................283
4.15 Security......................................................................................................................................285
4.15.1 Security Status.......................................................................................................................285
4.15.2 System Service......................................................................................................................287
4.15.3 Attack Defense.......................................................................................................................290
4.15.4 CA Certificate.........................................................................................................................294
4.15.5 Audio/Video Encryption .........................................................................................................296
4.15.6 Security Warning ...................................................................................................................298
4.16 Account......................................................................................................................................301
4.16.1 User.................................................................................................................................301
4.16.2 Group ..............................................................................................................................304
4.16.3 Reset Password..............................................................................................................305
4.16.4 ONVIF User.....................................................................................................................306
4.17 Output and Display....................................................................................................................308
4.17.1 Display.............................................................................................................................308
4.17.2 Tour .................................................................................................................................309
4.17.3 Customized Display ........................................................................................................311
4.18 Audio..........................................................................................................................................313
4.18.1 File Manage ....................................................................................................................313
4.18.2 Schedule .........................................................................................................................315
4.18.3 Broadcast........................................................................................................................316
4.19 USB Device Auto Pop-up..........................................................................................................318
4.20 Shutdown...................................................................................................................................318
5 Web Operation..................................................................................................................................322
5.1 Network Connection..................................................................................................................322
5.2 Web Login..................................................................................................................................322
5.3 Reset Password ........................................................................................................................323

Table of Contents XI
5.4 Web Main Menu ........................................................................................................................325
6 Glossary............................................................................................................................................328
7 FAQ...................................................................................................................................................329
Appendix 1 Cybersecurity Recommendations.........................................................................................334
Appendix 2 HDD Capacity Calculation....................................................................................................337
Appendix 3 Compatible Network Camera List.........................................................................................338

Features 1
1 Features
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

Features 2
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
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.

Front Panel and Rear Panel 3
2 Front Panel and Rear Panel
NOTE
The following front panel and rear panel figures are for reference only. The actual product shall prevail.
2.1 Front Panel
2.1.1 NVR41/41-P/41-W/41-4KS2/41-P-4KS2/21-S2/21-P-S2/21-8P-S2/41-4KS2/41-P-4K
S2/41-8P-4KS2/21-4KS2/21-P-4KS2/21-8P-4KS2 Series
The front panel is shown as in Figure 2-1.
Figure 2-1
Table 2-1
No.
Name
Function
1
HDD status indictor
light
The red light becomes on when HDD is
abnormal.
2
Power indicator light
The red light becomes on when the power
connection is OK.
3
Network status
indicator light
The red light becomes on when the network
connection is abnormal.
2.1.2 NVR41H/41H-P/41H-8P Series
The front panel is shown as in Figure 2-2.

Front Panel and Rear Panel 4
Figure 2-2
Table 2-2
Icon
Name
Function
NET
Network status
indicator light
The red light becomes on when the
network connection is abnormal.
PWR
Power indicator
light
The red light becomes on when the power
connection is OK.
HDD
HDD status
indictor light
The red light becomes on when HDD is
abnormal.
IR
Remote control
receiver
It is to receive signal from the remote
control.
2.1.3 NVR41HS-W-S2 Series
The front panel is shown as below. See Figure 2-3.
Figure 2-3

Front Panel and Rear Panel 5
Table 2-3
Icon
Name
Function
HDD
HDD status indicator
light
The blue light is on when the HDD is in malfunction.
NET
Network status indicator
light
The blue light is on when the network connection is
abnormal.
POWER
Power status indicator light
The blue light is on when the power connection is
OK.
USB2.0 port
Connect to peripheral USB 2.0 storage device,
mouse, burner and etc.
2.1.4 NVR41-8P Series
The front panel is shown as below. See Figure 2-4.
Figure 2-4
Table 2-4
No.
Name
Function
1
Network status indicator
light
The red light becomes on when the network
connection is abnormal.
2
Power indicator light
The red light becomes on when the power
connection is OK.
3
HDD status indictor light
The red light becomes on when HDD is abnormal.
4
USB
USB port
2.1.5 NVR41-8P-4KS2/L Series
The front panel is shown as below. See Figure 2-5.

Front Panel and Rear Panel 6
Figure 2-5
Table 2-5
No.
Name
Function
1
HDD status indictor
light
The red light becomes on when HDD is
abnormal.
2
Power indicator light
The red light becomes on when the power
connection is OK.
3
Network status
indicator light
The red light becomes on when the network
connection is abnormal.
2.1.6 NVR42/42-P/42-8P Series
The front panel is shown as below. See Figure 2-6.
Figure 2-6
Table 2-6
Icon
Name
Function
Power button
Power button, press this button for three
seconds to boot up or shut down NVR.
Shift
Shift
In textbox, click this button to switch between
numeral, English(Small/Capitalized), donation
and etc.
Up/1
Down/4
\
Activate current control, modify setup, and
then move up and down.
Increase/decrease numeral.
Assistant function such as PTZ menu.

Front Panel and Rear Panel 7
Icon
Name
Function
In text mode, input number 1/4 (English
character G/H/I).
Left/2
Right/3
\
Shift current activated control.
When playback, click these buttons to control
playback bar.
In text mode, input number 2(English character
A/B/C)/3(English character D/E/F).
ESC
ESC
Go to previous menu, or cancel current
operation.
When playback, click it to restore real-time
monitor mode.
Enter
ENTER
Confirm current operation.
Go to default button.
Go to menu.
Record
REC
Manually stop/start recording, working with
direction keys.
or numeral keys to select the recording
channel.
Slow play/8
Multiple slow play speeds or normal playback.
In text mode, input number 8 (English
character T/U/V).
Assistant
Fn
One-window monitor mode, click this button to
display assistant function: PTZ control and
image color.
Backspace function: in numeral control or text
control, press it for 1.5seconds to delete the
previous character before the cursor.
In motion detection setup, working with Fn and
direction keys to realize setup.
In text mode, click it to switch between
numeral, English character(small/capitalized)
and etc.
Fast play/7

Various fast speeds and normal playback.
In text mode, input number 7 (English
character P/Q/R/S).
Play previous/0
|
In playback mode, playback the previous
video.
In text mode, input number 0.
Reverse/Pause/6
||
In normal playback or pause mode, click this
button to reverse playback.
In reverse playback, click this button to pause
playback.
In text mode, input number 6 (English
character M/N/O).

Front Panel and Rear Panel 8
Icon
Name
Function
Play Next/9
|
In playback mode, playback the next video.
In menu setup, go to down ward of the
dropdown list.
In text mode, input number 9 (English
character W/X/Y/Z).
Play/Pause /5
||
In normal playback click this button to pause
playback.
In pause mode, click this button to resume
playback.
In text mode, input number 5(English character
J/K/L).
USB port
To connect USB storage device, USB mouse.
Network
abnormal
indicator light
Net
Network error occurs or there is no network
connection, the light becomes red to alert you.
HDD abnormal
indicator light
HDD
HDD error occurs or HDD capacity is below
specified threshold value, the light becomes
red to alert you.
Record light
1-16
System is recording or not. It becomes on
when system is recording.
IR Receiver
IR
It is to receive the signal from the remote
control.
2.1.7 NVR21HS-S2/21HS-P-S2/21HS-8P-S2/41HS-4KS2/41HS-P-4KS2/41HS-8P-4KS2/
21HS-4KS2/21HS-P-4KS2/21HS-8P-4KS2 Series
The front panel is shown as below. See Figure 2-7.
Figure 2-7
Table 2-7
Icon
Name
Function
HDD
HDD status indicator
light
The blue light is on when the HDD is
malfunction.
NET
Network status indicator
light
The blue light is on when the network
connection is abnormal.
POWER
Power status indicator
light
The blue light is on when the power connection
is OK.
USB port
Connect to peripheral USB storage device,
mouse and etc.