Dahua DB11 User manual

Video Doorbell
User’s Manual
V 1.0.1

II
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, DVR, 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:

III
● 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.
● 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:

IV
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 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.

V
Regulatory Information
FCC Information
CAUTION
Changes or modifications not expressly approved by the party responsible for compliance
could void the user's authority to operate the equipment.
FCC conditions:
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause
undesired operation.
FCC compliance:
This equipment has been tested and found to comply with the limits for a digital device,
pursuant to part 15 of the FCC Rules. This equipment generate, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the guide, may cause
harmful interference to radio communication.
For class A device, these limits are designed to provide reasonable protection against
harmful interference in a commercial environment. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
For class B device, these limits are designed to provide reasonable protection against
harmful interference in a residential installation. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.

VI
Foreword
General
This document elaborates introduction, installation, device adding and FAQ of video doorbell.
Model
DB11
Operation Definition
Italic Content
Note
Device Name
It represents modifiable parameter name. Specific contents are
different depending on settings. Default device name is its serial
number and default channel name is Channel 1.
Channel Name
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 Record
No.
Version No.
Revision Content
Release Date
1
V 1.0.0
First release
2018.3.30
2
V 1.0.1
Add FCC and privacy protection notice
2018.6.21
Privacy Protection Notice
As the device user or data controller, you might collect personal data of others, such as face,
fingerprints, car plate number, Email address, phone number, GPS and so on. You need to be

VII
in compliance with the local privacy protection laws and regulations to protect the legitimate
rights and interests of other people by implementing measures, including but not limited to:
providing clear and visible identification to inform data subject the existence of surveillance
area and providing related contact.
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.
The Manual would be updated according to the latest laws and regulations of related
regions. For detailed information, see the paper User's Manual, CD-ROM, QR code or our
official website. If there is inconsistency between paper User's 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 Guide (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.

VIII
Important Safeguards and Warnings
The following description is the correct application method of the device. Please read the
manual carefully before use, in order to prevent danger and property loss. Strictly conform to
the manual during application and keep it properly after reading.
Operating Requirement
Please don’t place and install the device in an area exposed to direct sunlight or near heat
generating device.
Please don’t install the device in a humid, dusty or fuliginous area.
Please keep its horizontal installation, or install it at stable places, and prevent it from
falling.
Please don’t drip or splash liquids onto the device; don’t put on the device anything filled
with liquids, in order to prevent liquids from flowing into the device.
Please install the device at well-ventilated places; don’t block its ventilation opening.
Use the device only within rated input and output range.
Please don’t dismantle the device arbitrarily.
Please transport, use and store the device within allowed humidity and temperature range.
Power Requirement
The product shall use electric cables (power cables) recommended by this area, which
shall be used within its rated specification.
Please use standard power adapter supplied with this device; otherwise, resulting personal
injury or device damage shall be borne by the user.
Please 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; please keep its convenient operation during
use.

IX
Table of Contents
Cybersecurity Recommendations.......................................................................................................... II
Regulatory Information............................................................................................................................V
Foreword..................................................................................................................................................VI
Important Safeguards and Warnings..................................................................................................VIII
1 Packing List......................................................................................................................................... 1
2 Device Introduction............................................................................................................................ 2
2.1 Front Panel.................................................................................................................................... 2
2.1.1 Status Description of Indicator Light................................................................................... 2
2.1.2 Description of Call Button................................................................................................... 3
2.2 Rear Panel.................................................................................................................................... 3
2.2.1 Description of Reset Button................................................................................................ 3
2.2.2 Description of Power Input Port.......................................................................................... 3
2.3 Bottom........................................................................................................................................... 5
3 Get Started........................................................................................................................................... 6
3.1 Download Lechange Client........................................................................................................... 6
3.2 Add Device.................................................................................................................................... 6
3.3 Doorbell Call................................................................................................................................ 13
3.3.1 Online Status of APP........................................................................................................ 13
3.3.2 Closed Status of APP....................................................................................................... 14
3.4 Monitoring ................................................................................................................................... 14
3.4.1 Live Share......................................................................................................................... 16
3.4.2 Full-screen Preview.......................................................................................................... 17
3.4.3 View Alarm Records ......................................................................................................... 17
4 Device Installation............................................................................................................................ 19
5 APP Operation................................................................................................................................... 20
5.1 Device Management................................................................................................................... 20
5.1.1 Modify Device Info............................................................................................................ 20
5.1.2 Modify Device Password.................................................................................................. 20
5.1.3 Link Chime........................................................................................................................ 21
5.1.4 Ring Setup........................................................................................................................ 23
5.1.5 Set PIR Motion Detection Zone........................................................................................ 24
5.1.6 Enable Alarm Info ............................................................................................................. 25
5.1.7 Set Storage Status............................................................................................................ 25
5.1.8 Set Time Zone .................................................................................................................. 26
5.1.9 Set Image Flip................................................................................................................... 27
5.1.10 Set Device Share............................................................................................................ 27
5.1.11 Cloud Update.................................................................................................................. 27
5.1.12 Modify Wi-Fi Config ........................................................................................................ 28
5.1.13 Delete Device ................................................................................................................. 29
5.2 Settings....................................................................................................................................... 30
5.2.1 Prompt .............................................................................................................................. 30

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5.3 View Message............................................................................................................................. 30
5.3.1 APP is Online.................................................................................................................... 30
5.3.2 APP is Closed................................................................................................................... 33
5.4 View Local Files.......................................................................................................................... 33
6 FAQ..................................................................................................................................................... 35
Technical Parameters........................................................................................................ 36

1
1Packing List
Check whether device appearance shows obvious damages.
Check whether all accessories are supplied. Packing list is as follows:
Video doorbell
User’s manual
Installation accessories package

2
2Device Introduction
2.1 Front Panel
Front panel includes PIR detection, IR light, camera, microphone, indicator light, call button and
loudspeaker, as shown in Figure 2-1.
Figure 2-1
2.1.1 Status Description of Indicator Light
Status description of indicator light is shown in Table 2-1.
Status
Symbol
Description
Blue Spinning
Calling
Enter AP reset mode
Blue Solid
Talking
Blue Flashing
Not connected with network
Abnormal network
Table 2-1

3
2.1.2 Description of Call Button
Short press: Ring the doorbell.
2.2 Rear Panel
Rear panel includes micro-SD card slot, Reset Button and power input port, as shown in Figure
2-2.
Figure 2-2
2.2.1 Description of Reset Button
Press it shortly, and indicator light turns to blue spinning light, representing that the hotspot
has been enabled.
Press it for 10s, and indicator light turns blue and is normally on for 3s. The device restores
factory defaults.
2.2.2 Description of Power Input Port
The doorbell can be matched with AC 16V–24V or DC 12V–24V power adapter. It is able to
connect different chimes under the condition of different power adapters.
With AC 16V–24V power adapter, it is able to connect wired chime (mechanical chime or

4
electronic chime) or Lechange wireless chime.
Wiring diagram of wired chime is shown in Figure 2-3 and Figure 2-4.
Figure 2-3
Figure 2-4
Wiring diagram of wireless chime is shown in Figure 2-5. It is unnecessary to match
ChimeKit. DS series wireless chime is solely connected with municipal electricity
(strong electricity) network.
Figure 2-5
With DC 12V/24V power adapter, it is able to connect Lechange wireless chime, as shown
in Figure 2-6. It is unnecessary to match ChimeKit. DS series wireless chime is solely
connected with municipal electricity (strong electricity) network.

5
Figure 2-6
2.3 Bottom
A screw hole at the bottom is used to fix the device onto the bracket, as shown in Figure 2-7.
Figure 2-7

6
3Get Started
Before installation, add the device in APP; ensure that calling and monitoring functions of
doorbell and APP work normally. Specific operations are as follows:
3.1 Download Lechange Client
Please ensure that your mobile phone has connected with Wi-Fi. Scan QR code below, or
search “Lechange” in APP market, download and log onto APP client. For specific operation,
please refer to relevant Lechange user’s manual.
Figure 3-1
This document takes iOS system as an example and explains operations.
3.2 Add Device
For the first use or reuse after long-term power-off, it takes 2 minutes to start the device.
At device list interface, press + to enter “QR Code Scanning” interface.
Scan QR code on the device or package; or press [Input serial number manually], input
serial number of the device manually, and press [Next].
The system displays a prompt interface to enable device hotspot, as shown in Figure
3-2.
Scan QR code to obtain serial number, and it will display serial number confirmation
interface. Press [Next] to enter the interface as shown in Figure 3-2.

7
Figure 3-2
Press Reset Button on the rear panel of the device.
In case of blue spinning light, it means that device hotspot is on.
On APP interface, press [Next].
The system displays a prompt interface to connect device hotspot, as shown in Figure
3-3.
Figure 3-3

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Connect mobile phone Wi-Fi with device hotspot. Hotspot Wi-Fi name is Doorbell-
device serial number.
0
Figure 3-4
On APP interface, press [Next].
The system displays device password setting interface, as shown in Figure 3-5.
If this device is not used for the first time, the interface is to enter device password,
rather than setting the password, as shown in Figure 3-6.

9
Figure 3-5
Figure 3-6
Set device password and email, and press [OK].
The system displays available Wi-Fi list, as shown in Figure 3-7.

10
Figure 3-7
Choose the Wi-Fi network to be connected.
The system displays Wi-Fi connection interface, as shown in Figure 3-8.
Figure 3-8
Input Wi-Fi network password and press [Connect].
The system displays indicator light judgment interface, as shown in Figure 3-9.