Dahua DHI-KTA02 User manual

Analog 4-Wire Video Intercom
Quick Start Guide
V1.
1.0

I
Foreword
General
This document mainly introduces structure, installation, wiring and menu operations of the analog
4-wire video intercom.
Model
VTH1020J, and VTH1020J-T
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
V1.1.0
A
dded description of the
functions of VTH1020J-T.
Added FactoryReset function.
March 2021
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.

II
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.
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
VTH ..................................................................................................................................................................................................4
VTO ..................................................................................................................................................................................................4
3 Wiring............................................................................................................................................................. 6
Preparations.................................................................................................................................................................................6
3.1.1 Port Connection Rules ................................................................................................................................................6
3.1.2 Cord Specification.........................................................................................................................................................7
Wiring One VTO and One VTH...............................................................................................................................................7
Wiring Three VTOs and One VTH ..........................................................................................................................................8
Wiring Two VTOs and Three VTHs ........................................................................................................................................9
4 Menu Operations......................................................................................................................................... 10
Snapshots....................................................................................................................................................................................10
Time...............................................................................................................................................................................................12
Restoring to Default Settings ..............................................................................................................................................12
Cybersecurity Recommendations ............................................................................................. 14

1
1Structure
Introduction
The analog 4-wire video intercom consists of a door station ("VTO") and an indoor monitor ("VTH"). It
is applicable to buildings, such as residential buildings, for people to do voice and video calls. The
VTO is installed outdoors and VTH is installed indoors.
Features
VTH
Real-time video/voice communication
Can be connected to three VTOs
Can be connected to cameras (CVBS)
Plug-and-play
VTO
Real-time voice communication
Self-adaptive IR illumination
Front Panel
Front panel

2
Table 1-1 Front panel
No. Icon Description
1 –Microphone.
2 Press to hang up the incoming call.
Take snapshots during monitoring (only supported by VTH1020J-T).
3
Wake up the screen, and bring up the menu.
For how to operate the menu, see "4 Menu Operations".
4
When someone is calling from the VTO:
Press once to do voice communication with the person.
Press twice quickly to hang up.
5
When someone is calling from the VTO:
Press to talk to the person (only supported by VTH1020J).
Press to take snapshots (only supported by VTH1020J-T).
When no one is calling:
Press once, twice, three times and four times to view live video of: VTO1,
VTO2, analog camera 1 and analog camera 2 respectively.
On any live video, press to take snapshots (only supported by VTH1020J-T).
6 When someone is calling, press to open the door where the VTO is installed.
7 – Power indicator.
8 – LCD screen.
9 – Microphone.
10 – Built-in camera.
11 – Power indicator.
12 –
Call button.
Press once to call the VTH.
Press and hold for 10 seconds to change the bell type of the VTO. The
power indicator will flash.
Press and hold for 15 seconds to turn up the bell volume of the VTO. 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 for the VTO. 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
2Installation
VTH
Fix the bracket on the wall by screws, hang the VTH on the bracket, and then apply silicone sealant to
the gap between the device and the wall.
VTH installation
VTO
Install the VTO bracket on the wall, and then hang the VTO on the bracket; or install the VTO cover on
the wall, and then hang the VTO on the cover. Finally, apply silicone sealant to the gap between the
device and the wall.
VTO installation

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