Dahua 2-Wire Switch User Manual

Foreword

General

This manual introduces the structure and installation of the 2-wire switch (hereinafter referred to as the "switch").

Safety Instructions

The following categorized signal words with defined meaning might appear in the manual.

Revision History

About the Manual

• The manual is for reference only. Slight differences might be found between the manual and the product.
• We are not liable for losses incurred due to operating the product in ways that are not in compliance with the manual.
• The manual will be updated according to the latest laws and regulations of related jurisdictions. For detailed information, see the paper user's manual, use our CD-ROM, scan the QR code or visit our official website. The manual is for reference only. Slight differences might be found between the electronic version and the paper version.
• All designs and software are subject to change without prior written notice. Product updates might result in some differences appearing between the actual product and the manual. Please contact customer service for the latest program and supplementary documentation.
• There might be errors in the print or deviations in the description of the functions, operations and technical data. 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 company names in the manual are properties of their respective owners.
• Please visit our website, contact the supplier or customer service if any problems occur while using the device. If there is any uncertainty or controversy, we reserve the right of final explanation.

Important Safeguards and Warnings

This section introduces content covering the proper handling of the Device, hazard prevention, and prevention of property damage. Read carefully before using the Device, comply with the guidelines when using it, and keep the manual safe for future reference.

Operation Requirements

• Change the default password after the switch is armed.
• Do not expose the switch to direct sunlight or near heat source.
• Do not expose the switch to dampness or dust.
• Install the switch horizontally or at a stable place to prevent it from falling.
• Do not drop or splash liquid onto the switch, or put anything filled with liquid onto the switch.
• Install the switch at a well-ventilated place, and do not block its vent.
• Use the switch within the rated range of power input and output.
• Do not dismantle the switch by yourself.
• Use the provided power supply.
• Before connecting cables, read and understand the structure first. See "2 Structure" for details.
• Before power on, make sure that all the cables are correctly connected.
• After powered on, if the POWER indicator is solid red, and RUN indicator flashes green, the switch is working properly.
• Before unplugging the power cable, make sure that the power switch is turned to "OFF".
• Do not stack the switches on one another.

Power Requirements

• The switch must use electric wires that conform to your local requirements and within their rated specifications.
• Use the power adapter provided with the switch; otherwise, it might result in people injury and device damage.
• Use power supply that meets ES1 but does not exceed PS2 limits defined in IEC 62368-1. For specific power supply requirements, refer to device labels.
• For type I devices, use a grounded power socket.
• The appliance coupler is a disconnection device. Keep a convenient angle when using it.

1 Introduction

1.1 Product Overview

The switch provides one 2-wire P port and one RJ-45 port. You can connect up to 22 devices into the network with one switch. When connected to network through the switch, 2-wire indoor monitors (VTH) can make calls, unlock doors and monitor.

1.2 Application

A single 2-wire switch can connect at most 20 VTHs and 2 door stations (VTOs).

Figure 1-1 Villa network diagram Description

The diagram illustrates a typical villa network configuration using the 2-wire switch. It shows the switch connected to a LAN port (likely for network connectivity). The switch has two main connection types: a 2-wire port (labeled 'UP' and numbered 1, 2, 21, 22) and an RJ-45 Ethernet port (labeled 'LAN'). The 2-wire port connects to multiple devices, including Door Stations (VTOs) and Indoor Monitors (VTHs). The diagram also indicates power input (DC IN), an ON/OFF switch, and labels for different cable types: Power cable (orange), Signal cable (yellow), and Ethernet cable (blue). The diagram emphasizes 'CAUTION: KEEP DRY. INDOOR USE ONLY.'

1.3 Cable Requirements

See the instruction below when choosing the right signal cables for the amount of devices you have:

R (total resistance) = 6V / (the number of VTHs / 0.1A) (the average current for each VTH)

For example, the total resistance of the cables for 5 VTHs must be less than 6V / 5 / 0.1A = 12Ω.

Table 1-1 Description of using different cables

❗ The cable between 1 switch and one VTO/VTH must be longer than 1 m.

2 Structure

2.1 Front Panel

Figure 2-1 Front panel structure Description

The front panel of the 2-wire switch features indicator lights, UP directional arrows, a DC IN power input port, an OUT port, and an ON/OFF power switch. A prominent warning label reads 'CAUTION: KEEP DRY. INDOOR USE ONLY.'

Table 2-1 Structure description

❗ Before connecting cables, power off the switch first to avoid damaging it.

2.2 Rear Panel

Figure 2-2 Rear panel structure Description

The rear panel of the 2-wire switch is designed for mounting. It includes four screw holes for direct wall mounting, a central rail mechanism for guide rail installation, and a lower hook that secures the device when mounted on a guide rail.

Table 2-2 Structure description

3 Installation

The chapter introduces how to install the switch on the wall with screws or a guide rail.

3.1 Installing with Screws

Use screws to fix the switch at a proper location on the wall.

Figure 3-1 Install the switch with screws Description

This illustration depicts the process of installing the 2-wire switch onto a wall using screws. It shows the switch being affixed to the wall with four ST3 x 18-SUS self-tapping screws, utilizing expansion bolts in the wall for secure mounting.

3.2 Installing with a Guide Rail

Preparation

• Prepare a standard 35 mm guide rail.
• The switch does not come with a guide rail.

Procedure

1. Fix the guide rail at a proper location on the wall.
2. Fix the upper hooks inside the slot of the guide rail.
3. Pull down the lower hook and press the switch close to the guide rail.
4. Let go of the lower hook.

Figure 3-2 Install with a guide rail (1) Description

This diagram shows the initial step of attaching the switch to a guide rail mounted on the wall. The switch is positioned near the guide rail, with its upper hooks ready to engage with the rail's slot.

Figure 3-3 Install with a guide rail (2) Description

This diagram provides a side view illustrating how the switch is secured to the guide rail. It shows the engagement of the 'Upper hook' and the 'Lower hook' with the guide rail, demonstrating the mechanism for mounting the device.

Appendix 1 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

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