Dahua KTA02 User manual

Analog 4-Wire Video Intercom
Quick Start Guide
V1.0.0
V1.0.0

I
Foreword
General
This document mainly introduces structure, installation, wiring and menu operations of the
analog 4-wire video intercom.
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
V1.0.0
First release.
August 2020
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
jurisdictions. For detailed information, refer to 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, we reserve the right of final explanation.

II
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
occurring when using the device.
If there is any uncertainty or controversy, we reserve the right of final explanation.

III
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 Requirements
Do not expose the device to direct sunlight or heat source.
Do not install the device in a humid or dusty area.
Install the device horizontally at stable places to prevent it from falling.
Do not drip or splash liquids onto the device; do not put on the device anything filled with
liquids.
Install the device at well-ventilated places and do not block its ventilation opening.
Use the device only within rated input and output range.
Do not dismantle the device by yourself.
The device should be used with screened network cables.
Power Requirements
Use recommended power cables in the region under their rated specification.
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.
Appliance coupler is a disconnecting device. During normal use, please keep an angle that
facilitates operation.
Device Update
Do not cut off power supply during device update. Power supply can be cut off only after the
device has completed update and has restarted.

IV
Table of Contents
Foreword ..................................................................................................................................................I
Important Safeguards and Warnings...................................................................................................III
1 Structure ..............................................................................................................................................1
Introduction .................................................................................................................................1
Features ......................................................................................................................................1
Front Panel..................................................................................................................................1
Rear Panel ..................................................................................................................................3
2 Installation ...........................................................................................................................................4
Indoor Monitor .............................................................................................................................4
Door Station ................................................................................................................................4
3 Wiring ...................................................................................................................................................6
Preparations................................................................................................................................6
3.1.1 Port Connection Rules ......................................................................................................6
3.1.2 Cord Specification .............................................................................................................7
Wiring One Door Station and One Indoor Monitor.......................................................................7
Wiring Three Door Stations and One Indoor Monitor ..................................................................8
Wiring Two Door Stations and Three Indoor Monitors.................................................................9
4 Menu Operations ...............................................................................................................................10
Cybersecurity Recommendations ..................................................................................11

1
1 Structure
Introduction
The analog 4-wire video intercom consists of a door station and an indoor monitor. It is
applicable to buildings, such as residential buildings, for people to do voice and video calls. The
door station is installed outdoors and indoor monitor is installed indoors.
Features
Indoor Monitor
Real-time video/voice communication
Can be connected to three door stations
Can be connected to cameras (CVBS)
Plug-and-play
Door Station
Real-time voice communication
Self-adaptive IR illumination
Built-in camera (720 × 576@50I)
Front Panel
Front panel

2
Table 1-1 Front panel
No.
Icon
Description
1
–
Microphone.
2
Press to hang up the incoming call.
3
Bring up the menu.
4
When someone is calling from the door station:
Press once to do voice communication with the person.
Press twice quickly to hang up.
5
When someone is calling from the door station, press to do voice
communication with the person.
When no one is calling, press once, twice, three times and four times to
view live video of: door station 1, door station 2, analog camera 1 and
analog camera 2 respectively.
6
When someone is calling, press to open the door where the door station is
installed.
7
–
Power indicator.
8
–
LCD screen.
9
–
Microphone.
10
–
Built-in camera.
11
–
Power indicator.
12
–
Call button.
Press once to call indoor monitor.
Press and hold for 10 seconds to change the bell type of the door
station. The power indicator will flash.
Press and hold for 15 seconds to turn up the bell volume of the door
station. The power indicator will flash. When the volume reaches
maximum, this step will set it to minimum. Repeat this step to set
appropriate volume.
Press and hold for 20 seconds to change to DWDR (digital wide
dynamic range)/normal mode of the door station. The power indicator
will flash.
13
–
Speaker.

3
Rear Panel
Rear panel
Table 1-2 Rear panel
No.
Description
No.
Description
1
Analog camera port 1.
6
VTH cascading port 1.
2
VTO port 1.
7
VTH cascading port 2.
3
VTO port 2.
8
VTO hanging slot.
4
Power input.
9
Wires.
5
Analog camera port 2.
–
–

4
2 Installation
Indoor Monitor
Fix the bracket on the wall by screws, hang the indoor monitor on the bracket, and then apply
silicone sealant to the gap between the device and the wall.
Indoor monitor installation
Door Station
Install the door station bracket on the wall, and then hang the door station on the bracket; or
install the door station cover on the wall, and then hang the door station on the cover. Finally,
apply silicone sealant to the gap between the device and the wall.
Door station installation

5
Apply silicone sealant to the gap between the device and the wall

6
3 Wiring
At most 2 door stations and 3 indoor monitors can be wired in one communication system.
Preparations
3.1.1 Port Connection Rules
Port connection rules
Port A of an indoor monitor can be connected to Port C of another indoor monitor to do
data communication.
Port B of an indoor monitor can be connected to Port D of another indoor monitor to do
data communication.
Port A of an indoor monitor cannot be connected to Port B or D of another indoor monitor to
do data communication.

7
Port C of an indoor monitor cannot be connected to Port B or D of another indoor monitor
to do data communication.
3.1.2 Cord Specification
Depending on the distance between the door station and indoor monitor, you need to select
RVV4 cords of different specifications.
Table 3-1 Cord specification
Transmission Distance (TD)
RVV4 Cord Specification
TD ≤ 10 m
RVV4 × 0.3 mm²
10 m < TD ≤ 30 m
RVV4 × 0.5 mm²
30 m < TD ≤ 50 m
RVV4 × 0.75 mm²
If the distance between the door station and indoor monitor is more than 50 m, please use
coaxial cables.
Do not pull the cords violently.
During wiring, wrap the cord joints with insulated rubber tape to prevent short circuit.
Wiring One Door Station and One Indoor Monitor
Wiring (1)

8
Wiring Three Door Stations and One Indoor Monitor
Wiring (2)

9
Wiring Two Door Stations and Three Indoor Monitors
Wiring (3)
The recommended analog cameras (CVBS) are HAC 1230 series.

10
4 Menu Operations
Menu
Table 4-1 Menu operations
Icon
Function
Wake up the screen.
Turn down Vol (volume), Bright (brightness), Contrast and BellVol (bell
volume), change Bell and turn off DND (do not disturb).
Turn up Vol (volume), Bright (brightness), Contrast and BellVol (bell volume),
change Bell and turn off DND (do not disturb).
Select an item to adjust or change.
Exit the menu and lock the screen.

11
Cybersecurity Recommendations
Cybersecurity is more than just a buzzword: it’s something that pertains to every device that is
connected to the internet. IP video surveillance is not immune to cyber risks, but taking basic
steps toward protecting and strengthening networks and networked appliances will make them
less susceptible to attacks. Below are some tips and recommendations on how to create a
more secured security system.
Mandatory actions to be taken for basic device network security:
1. Use Strong Passwords
Please refer to the following suggestions to set passwords:
The length should not be less than 8 characters;
Include at least two types of characters; character types include upper and lower case
letters, numbers and symbols;
Do not contain the account name or the account name in reverse order;
Do not use continuous characters, such as 123, abc, etc.;
Do not use overlapped characters, such as 111, aaa, etc.;
2. Update Firmware and Client Software in Time
According to the standard procedure in Tech-industry, we recommend to keep your
device (such as NVR, DVR, IP camera, etc.) firmware up-to-date to ensure the system
is equipped with the latest security patches and fixes. When the device is connected
to the public network, it is recommended to enable the “auto-check for updates”
function to obtain timely information of firmware updates released by the
manufacturer.
We suggest that you download and use the latest version of client software.
"Nice to have" recommendations to improve your device network security:
1. Physical Protection
We suggest that you perform physical protection to device, especially storage devices. For
example, place the device in a special computer room and cabinet, and implement
well-done access control permission and key management to prevent unauthorized
personnel from carrying out physical contacts such as damaging hardware, unauthorized
connection of removable device (such as USB flash disk, serial port), etc.
2. Change Passwords Regularly
We suggest that you change passwords regularly to reduce the risk of being guessed or
cracked.
3. Set and Update Passwords Reset Information Timely
The device supports password reset function. Please set up related information for
password reset in time, including the end user’s mailbox and password protection
questions. If the information changes, please modify it in time. When setting password
protection questions, it is suggested not to use those that can be easily guessed.
4. Enable Account Lock
The account lock feature is enabled by default, and we recommend you to keep it on to
guarantee the account security. If an attacker attempts to log in with the wrong password
several times, the corresponding account and the source IP address will be locked.
5. Change Default HTTP and Other Service Ports

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We suggest you to change default HTTP and other service ports into any set of numbers
between 1024~65535, reducing the risk of outsiders being able to guess which ports you
are using.
6. Enable HTTPS
We suggest you to enable HTTPS, so that you visit Web service through a secure
communication channel.
7. MAC Address Binding
We recommend you to bind the IP and MAC address of the gateway to the device, thus
reducing the risk of ARP spoofing.
8. Assign Accounts and Privileges Reasonably
According to business and management requirements, reasonably add users and assign a
minimum set of permissions to them.
9. Disable Unnecessary Services and Choose Secure Modes
If not needed, it is recommended to turn off some services such as SNMP, SMTP, UPnP,
etc., to reduce risks.
If necessary, it is highly recommended that you use safe modes, including but not limited to
the following services:
SNMP: Choose SNMP v3, and set up strong encryption passwords and authentication
passwords.
SMTP: Choose TLS to access mailbox server.
FTP: Choose SFTP, and set up strong passwords.
AP hotspot: Choose WPA2-PSK encryption mode, and set up strong passwords.
10. Audio and Video Encrypted Transmission
If your audio and video data contents are very important or sensitive, we recommend that
you use encrypted transmission function, to reduce the risk of audio and video data being
stolen during transmission.
Reminder: encrypted transmission will cause some loss in transmission efficiency.
11. Secure Auditing
Check online users: we suggest that you check online users regularly to see if the
device is logged in without authorization.
Check device log: By viewing the logs, you can know the IP addresses that were used
to log in to your devices and their key operations.
12. Network Log
Due to the limited storage capacity of the device, the stored log is limited. If you need to
save the log for a long time, it is recommended that you enable the network log function to
ensure that the critical logs are synchronized to the network log server for tracing.
13. Construct a Safe Network Environment
In order to better ensure the safety of device and reduce potential cyber risks, we
recommend:
Disable the port mapping function of the router to avoid direct access to the intranet
devices from external network.
The network should be partitioned and isolated according to the actual network needs.
If there are no communication requirements between two sub networks, it is
suggested to use VLAN, network GAP and other technologies to partition the network,
so as to achieve the network isolation effect.
Establish the 802.1x access authentication system to reduce the risk of unauthorized
access to private networks.

13
Enable IP/MAC address filtering function to limit the range of hosts allowed to access
the device.