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1 10/100 / 1000TX и 1 1000FX | Промышленный медиаконвертер JHA-IG11H
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2 разъема 10/100 / 1000TX и 1 разъем SFP 1000X | Промышленный медиаконвертер JHA-IGS12H
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5 10/100/1000TX | Unmanaged Industrial Ethernet Switch JHA-IG05H
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4 10/100/1000TX And 2 1000FX | Unmanaged Industrial Ethernet Switch JHA-IG24H
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6 10/100TX and 2 100FX | Unmanaged Industrial Ethernet Switch JHA-IF26H
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1 10/100/1000TX and 4 10/100TX | Unmanaged Industrial Ethernet Switch JHA-IG1F8H
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16 10/100 / 1000TX | Неуправляемый промышленный коммутатор Ethernet JHA-IG016H
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24 10/100 / 1000TX | Неуправляемый промышленный коммутатор Ethernet JHA-IG024H
Telecom/Datacom Systems
JHA Technologies is a premier supplier of standard or tailored digital fiber optic transmission products and solutions of video, audio, data, contact closure and Ethernet for mission critical applications in the security and surveillance industry.
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Intelligent Transportation system
In the field of Intelligent Transportation system, the distance between equipment is far, and the environment is harsh. JHA provided high performance and tailor-made industrial Ethernet products with special, wide temperature and high protection level.
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Smart City
In the field of Intelligent Transportation system, the distance between equipment is far, and the environment is harsh. JHA Technologies offers a complete and comprehensive line of fiber optic transmission products to meet the unique requirements of flexibilities and scalabilities of the intelligent transportation systems (ITS) including subways, railways, tunnels harbors and airports.
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Energy
Typical applications for energy and utility industries include:Electric Power,oil & gas, marine, and wind power. JHA Technologies offers industrial Ethernet products specially designed with high standards of safety, reliability and durability for most harsh or hazardous applications of energy industries.
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About us
Шэньчжэнь ПВД Technology Co., Ltd является одним из ведущих производителей закаленной Ethernet, PoE и коммуникационные продукты волокна, специально предназначенные для использования в жестких и сложных условиях. Основанная в 2007 году в Шэньчжэнь Китай, ПВД Tech специализируется на разработке и производстве промышленных коммутаторов Ethernet, медиаконвертеры, SFP трансивер и власть над Ethernet продукты для приложений, где подключение имеет решающее значение. С нашим основным акцентом на Ethernet подключении для экстремальных сред с жесткими требованиями к надежности и качества продукции являются главным приоритетом.
Our advantage
Our Footprint
Shenzhen JHA Technology Co. Ltd, founded in 2007 in Shenzhen China,so far with 2 SMT lines, 2 DIP lines, 2 assembling lines, 2 packaging lines, and 4 testing lines. Overseas OEM/ODM customers have exceeded 200.
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The common choice of fitness enthusiasts
A few points about fiber switch parameters
Switching Capacity
The switching capacity of the switch, also known as the backplane bandwidth or switching bandwidth, is the maximum amount of data that can be handled between the switch interface processor or interface card and the data bus. The exchange capacity indicates the total data exchan...
How does a router work?
A router is a layer 3 network device. The hub works on the first layer ( the physical layer) and has no intelligent processing capabilities. When the current of one port is passed to the hub, it simply transmits the current to other ports, and does not care whether the computers connected to othe...
How are optical transceivers divided according ...
Optical transceivers can be divided into 3 categories according to technology: PDH, SPDH, SDH, HD-CVI.
PDH optical transceiver:
PDH (Plesiochronous Digital Hierarchy, quasi-synchronous digital series) optical transceiver is a small-capacity optical transceiver, which is generally used in pairs, a...
What does the optical transceiver 2M mean, and ...
Optical transceiver is a device that converts multiple E1 signals into optical signals. Optical transceiver is also called optical transmission equipment. Optical transceivers have different prices according to the number of E1 (that is, 2M) ports transmitted. Generally, the smallest optical tran...
Analysis of fiber switch types
Access Layer Switch
Usually, the part of the network that is directly connected to users or accesses the network is called the access layer, and the part between the access layer and the core layer is called the distribution layer or the convergence layer. Access switches are generally used to di...
What is Cat5e/Cat6/Cat7 Cable?
What is the difference between Ca5e, Cat6, and Cat7?
Category Five (CAT5): The transmission frequency is 100MHz, used for voice transmission and data transmission with a maximum transmission rate of 100Mbps, mainly used in 100BASE-T and 10BASE-T networks. This is the most commonly used Ethernet c...
What is 1*9 optical module?
The 1*9 packaged optical module product was first produced in 1999. It is a fixed optical module product. It is usually directly cured (soldered) on the circuit board of the communication equipment and used as a fixed optical module. Sometimes it is also called a 9-pin or 9PIN optical module. .
A...
What is the difference between Layer 2 and Laye...
1. Different working levels:
Layer 2 switches work at the data link layer, and Layer 3 switches work at the network layer. Layer 3 switches not only achieve high-speed forwarding of data packets, but also achieve optimal network performance according to different network conditions.
2. The prin...
How to use fiber optic transceivers?
The function of fiber optic transceivers is to convert between optical signals and electrical signals. The optical signal is input from the optical port, and the electrical signal is output from the electrical port, and vice versa. The process is roughly as follows: convert the electrical signal ...
How Managed Ring Switches Work?
With the development of the communication industry and the informatization of the national economy, the managed ring network switch market has grown steadily. It is cost-effective, highly flexible, relatively simple and easy to implement. Ethernet technology has become an important LAN network te...
The development of telephone optical transceiver
Our country’s telephone optical transceivers have developed rapidly with the development of the monitoring industry. From analog to digital, and then from digital to high-definition, they are constantly advancing. After years of technical accumulation, they have developed to a very mature s...
What is IEEE 802.3&Subnet Mask?
What is IEEE 802.3?
IEEE 802.3 is a working group that wrote the Institute of Electrical and Electronics Engineers (IEEE) standard set , which defines medium access control (MAC) at both the physical and data link layers of wired Ethernet. This is usually a local area network (LAN) technology wi...
What is the difference between a switch and a f...
Optical fiber transceiver is a very cost-effective and flexible device. The common use is to convert electrical signals in twisted pairs into optical signals. It is generally used in Ethernet copper cables that cannot be covered and must use optical fibers to extend the transmission distance. In ...
What is Ring network redundancy& IP protocol?
What is Ring network redundancy?
A ring network uses a continuous ring to connect each device together. It ensures that the signal sent by one device can be seen by all other devices on the ring. The ring network redundancy refers to whether the switch supports the network when the cable connecti...
What is Network Topology&TCP/IP?
What is Network Topology
Network topology refers to the physical layout features such as the physical connection of various transmission media, network cables, and abstractly discusses the interaction of various endpoints in a network system by borrowing the two most basic graphic elements in geo...
Что такое STP и что такое OSI?
What is STP?
STP (Spanning Tree Protocol ) is a communication protocol that works on the second layer (data link layer) in the OSI network model. Its basic application is to prevent loops caused by redundant links in switches. It is used to ensure that there is no loop in Ethernet. The logical to...
Что такое управляемый коммутатор и SNMP?
What is a managed switch?
The task of a managed switch is to keep all network resources in good condition. The network management switch products provide various network management methods based on the terminal control port (Console), based on the Web page and supporting Telnet to log in to the n...
Что такое волоконно-оптический приемопередатчик?
Optical fiber transceiver is an Ethernet transmission media conversion unit that interchanges short-distance twisted-pair electrical signals and long-distance optical signals. It is also called a fiber converter in many places. The product is generally used in the actual network environment where...
Что такое широковещательный шторм и кольцо Ethernet?
What is a broadcast storm?
A broadcast storm simply means that when the broadcast data floods the network and cannot be processed, it occupies a large amount of network bandwidth, resulting in the inability of normal services to run, or even complete paralysis, and a “broadcast storm”...
Основные особенности технологии GPON
(1) Unprecedented high bandwidth. The rate of GPON is as high as 2.5 Gbps, which can provide a large enough bandwidth to meet the growing demand for high bandwidth in future networks, and its asymmetric characteristics can better adapt to the broadband data service market.
(2) Full-service access...
Что такое GPON и EPON?
What is Gpon?
GPON (Gigabit-Capable PON) technology is the latest generation of broadband passive optical integrated access technology based on the ITU-TG.984.x standard. It has many advantages such as high bandwidth, high efficiency, large coverage, and rich user interfaces. Most operators rega...
What is a PoE switch? The difference between Po...
PoE switch is a widely used device in the security industry today, because it is a switch that provides power and data transmission for remote switches (such as IP phones or cameras), and plays a very important role. When using PoE switches, some PoE switches are marked with PoE, and some are mar...
What is a DVI optical transceiver? What are the...
The DVI optical transceiver is composed of a DVI transmitter (DVI-T) and a DVI receiver (DVI-R), which transmit DVI, VGA, Audip, and RS232 signals through a single-core single-mode fiber.
What is a DVI optical transceiver?
DVI optical transceiver is a terminal device for DVI optical signal...
Four precautions for the use of fiber optic tra...
In network construction and application, since the maximum transmission distance of the network cable is generally 100 meters, it is necessary to use relay equipment such as optical fiber transceivers when deploying a long-distance transmission network. Optical fiber transceivers are generally us...
What are the common faults and solutions of HDM...
HDMI optical transceiver is a terminal device for optical signal transmission. In a wide range of applications, it is often necessary to transmit the HDMI signal source to a distance for processing. The most prominent problems are: color cast and blur of the signal received at a distance, ghostin...
What is the maximum transmission distance of th...
To know the maximum transmission distance of PoE, we must first figure out what are the key factors that determine the maximum distance. In fact, using standard Ethernet cables (twisted pair) to transmit DC power can be carried over a long distance, which is far greater than the transmission dist...
Что такое оптический модуль?
The optical module is composed of optoelectronic devices, functional circuits and optical interfaces. The optoelectronic device includes two parts: transmitting and receiving. Simply put, the function of the optical module is to convert the electrical signal into an optical signal at the sending ...
The trends for China’s network equipment ...
New technologies and new applications continue to catalyze the high growth trend of data traffic, which is expected to drive the network equipment market to exceed expected growth.
With the growth of global data traffic, the number of Internet devices is also increasing rapidly. At the same time,...
What is the difference between an Ethernet swit...
Although both are used for network switching, there are differences in function.
Difference 1: The load and subnetting are different. There can only be one path between Ethernet switches, so that information is concentrated on one communication link and cannot be dynamically allocated to balance...
Тип оптического трансивера и тип интерфейса
Optical transceiver is the terminal equipment for optical signal transmission.
1. Optical transceiver type:
Optical transceiver is a device that converts multiple E1 (a data transmission standard for trunk lines, usually at a rate of 2.048Mbps, this standard is used in China and Europe) into opti...
Transmitter? Receiver? Can the A/B end of the f...
For optical fiber transceivers, the main function of the transceiver is to extend the network transmission distance, which can alleviate the defect that the network cable cannot transmit long-distance to a certain extent, and bring convenience to the last kilometer transmission, but for those who...
Which fiber media converter transmits and which...
When we transmit over long distances, we usually use optical fibers to transmit. Because the transmission distance of optical fiber is very long, in general, the transmission distance of single-mode fiber is more than 20 kilometers, and the transmission distance of multi-mode fiber can reach up t...
What is the difference between AOC and DAC? how...
Generally speaking, active optical cable(AOC) and direct attach cable (DAC)have the following differences:
① Different power consumption: the power consumption of AOC is higher than that of DAC;
②Different transmission distances: In theory, the longest transmission distance of AOC can reach 100M,...
Какова роль оптоволоконного медиаконвертера?
The fiber media converter is a necessary product equipment for the optical communication system. Its main function is the Ethernet transmission media conversion unit that exchanges short-distance twisted-pair electrical signals and long-distance optical signals. fiber media converter products are...
When purchasing a switch, what is the appropria...
The protection level of industrial switches is drafted by IEC (International Electrotechnical Association). It is represented by IP, and IP refers to “ingress protection. So, when we buy industrial switches, what is the appropriate IP level of industrial switches?
Classify electrical applia...
What is the difference between a POE switch and...
1. Different reliability:
POE switches are switches that support power supply to network cables. Compared with ordinary switches, power-receiving terminals (such as APs, digital cameras, etc.) do not need to perform power wiring, and are more reliable for the entire network.
2. Different function...
What are the precautions for industrial switche...
What are the precautions for industrial switches in daily use?
(1) Do not place the device in a place close to water or damp;
(2) Do not put anything on the power cable, keep it out of reach;
(3) In order to avoid fire, do not knot or wrap the cable;
(4) The power connector and other equipment co...
Function and Application of Industrial Fiber Sw...
Industrial Fiber switch (Industrial Switch), also known as industrial Ethernet switch, is a work in the second layer of OSI (data information link layer, defined with reference to “local area network”), according to MAC (network port material key management) Detailed address) identifi...
Как решить проблему нестабильности коммутаторов POE
POE switches provide everyone with great convenience and speed, but because of the complete functions of POE switches, it is also not enough. The reliability of POE switches is also the most obvious factor in this deficiency. In order to better POE Switches can be more reliable, and everyone is a...
Как выбрать промышленный оптоволоконный коммутатор
In recent years, there have been many brands of industrial switches, which are widely used in many fields, such as: intelligent transportation, rail transit, electric power, mining and other fields. Due to the need to consider many factors, such as the task situation, whether redundancy is requir...
Особенности коммутаторов POE промышленного класса
1. Gigabit port, efficient transmission
Support 1 SFP Gigabit single-mode/multi-mode optical port and 1 10/100/1000M adaptive RJ45 network port, all ports have full wire-speed forwarding function to ensure non-blocking packet forwarding.
2. High-strength metal shell with strong heat dissipation p...
Что такое промышленный коммутатор PoE?
Industrial PoE switch refers to an industrial switch with PoE power supply, or an industrial-grade PoE switch. The industrial PoE switch is based on the existing industrial Ethernet switch, by embedding a PoE power supply chip, through the network cable to provide terminal network equipment. Pow...
Logical isolation and physical isolation about ...
What is physical isolation:
The so-called “physical isolation” means that there is no mutual data interaction between two or more networks, and there is no contact at the physical layer/data link layer/IP layer. The purpose of physical isolation is to protect the hardware entities and...
Технические преимущества Poe
1) Simplify wiring and save costs. Many live equipment, such as surveillance cameras, need to be installed where it is difficult to deploy AC power supply. Poe eliminates the need for expensive power supply and the time spent in installing power supply, saving cost and time.
2) It is convenient f...
Применение Poe в сфере безопасности
Thanks to the unique advantages of Poe technology, many devices supporting Poe power supply have appeared in the field of security monitoring, including Poe webcam, Poe network hemisphere, Poe network ball machine, Poe network hard disk video recorder, etc.
These devices have the function of Poe ...
What is the role of network switches in the dat...
A network switch is a device that expands the network and can provide more connection ports in the sub-network to connect more computers. It has the characteristics of high cost performance, high flexibility, relative simplicity, and easy implementation.
When a network switch interface receives m...
Как использовать оптоволоконный медиаконвертер PoE?
PoE fiber media converter one of the common devices for building enterprise PoE network architectures, which can utilize existing unshielded twisted pair cabling to power network equipment.
1. What is a PoE fiber media converter ?
Simply put, a PoE fiber optic transceiver is an optical-to-electri...
Каковы скрытые индикаторы коммутаторов POE?
A very important hidden indicator of POE switches is the total power supplied by POE. Under the IEEE802.3af standard, if the total POE power supply of a 24-port POE switch reaches 370W, then it can supply 24 ports (370/15.4=24), but if it is a single port according to the IEEE802.3at standard, th...
Почему По?
With the increasing popularity of IP phone, network video monitoring and wireless Ethernet equipment in the network, the requirement of providing power support through Ethernet itself is becoming more and more urgent. In most cases, the terminal equipment needs DC power supply, and the terminal e...
Что такое Poe-технология?
POE (power over Ethernet) refers to a technology of transmitting power through network cable. With the help of existing Ethernet, it can simultaneously transmit data and supply power to IP terminal equipment (such as IP phone, AP, IP camera, etc.) through network cable.
Poe is also known as power...
Introduction of three major indicators of netwo...
Managed switch products provide a variety of network management methods based on the terminal control port (Console), based on Web pages, and support for Telnet to log in to the network remotely. Therefore, network administrators can perform local or remote real-time monitoring of the switch̵...
Что такое оптический трансивер SDI?
High-definition SDI optical transceiver is evolved on the basis of ordinary digital video optical transceiver, using H.264 encoding method, generally using SDI interface.
SD/HD/3G-SDI optical transceiver products were first developed and used by customers in the radio and television industry. The...
Что такое мини-оптический трансивер?
Today, with the prevalence of the Internet, the networks we usually use are inseparable from the role of transceivers. There are many kinds of transceivers. With the sharp increase in the demand for network capacity, transceivers are derived from POE transceivers. Managed, Managed, and Mini Optic...
Application of Industrial Switch in Rail Transi...
As we all know, almost every city has industrial and rail transit, and industrial switches are indispensable in rail transit, so do you know the application of industrial switches in rail vehicle systems?
Rail transit PIS system is a system that relies on multimedia network technology, takes comp...
How to choose a PoE switch for security monitor...
There are many types of PoE switches, ranging from 100M to 1000M to full gigabit, as well as the difference between unmanaged and managed types, and the difference in the number of different ports. If you want to choose a suitable switch, you need to consider comprehensively. . Take a project tha...
MetroNet begins construction of 100% fiber opti...
BRIAN, Texas, Dec. 14, 2021–(BUSINESS WIRE)–MetroNet announced today that residential construction has begun on MetroNet’s 100% fiber-optic infrastructure in the City of Bryan .MetroNet will fully fund a multi-million dollar investment to provide residents and businesses with ultra-fa...
Знакомство с 5 функциями Network Extender
The network extender uses LRE technology, which can break through the limitation of Ethernet transmission distance within 100 meters, and can extend the 10BASE-TX twisted pair electrical signal to 350-700 meters. It extends the limit of the network transmission distance from 100 meters of copper ...
Network Extender Product Features and Interface...
A network extender is a device that can effectively extend the network transmission distance. The network extender NE300 can extend the limit of the network transmission distance from 100 meters of copper wire to 300 meters, and can easily realize the interconnection between routers, switches, vi...
Какие параметры оптического модуля?
In the summary of modern information networks, optical fiber communication occupies a dominant position. With the increasing coverage of the network and the continuous increase of communication capacity, the improvement of communication links is also an inevitable development. Optical modules rea...
Industrial Grade Gigabit Fiber Media Converter ...
Industrial-grade fiber media converter is an industrial switch that can extend the transmission distance. It has the advantages of convenience, simple maintenance, strong anti-interference performance, powerful performance, and stable operation. The product design conforms to the Ethernet standar...
What are the types of telephone optical transce...
Through the previous introduction, we learned that the telephone optical transceiver is a device that converts the traditional telephone signal into an optical signal and transmits it on the optical fiber. However, how is the telephone optical transceiver classified and what types are there?
Tel...
Разница между интерфейсом HDMI и VGA
The HDMI interface is a fully digital video and sound transmission interface, which can send uncompressed audio and video signals at the same time. It only needs 1 HDMI cable when used, which greatly reduces the difficulty of installation and use. The HDMI interface is the current mainstream inte...
Что такое оптический приемопередатчик DVI?
DVI optical transceiver is composed of DVI transmitter (DVI-T) and DVI receiver (DVI-R), and transmits DVI, VGA, Audip, RS232 signals through a single-core single-mode optical fiber.
What is a DVI optical transceiver?
DVI optical transceiver is the terminal device for DVI optical signal transmiss...
Why can’t commercial Ethernet switches be...
In the industrial field, extreme temperatures may cut off the transmission of remote data streams. Ethernet switches play an important role in field transmission. However, due to their high prices, some customers will choose to use commercial-grade Ethernet switches, but this type of switch It is...
What are the main features and advantages of co...
Nowadays, with the rapid development of industrial switch technology, it is widely used in many fields, especially in the three fields of power, transportation, and metallurgy. It is known as the three potential industries of industrial switch applications. Since the application of industrial swi...
Detailed explanation of the three forwarding me...
Exchange is a general term for technologies that send the information to be transmitted to the corresponding routing that meets the requirements by manual or automatic equipment according to the requirements of transmitting information at both ends of the communication. According to different wor...
The difference between ST, SC, FC, LC fiber opt...
ST, SC, and FC fiber optic connectors are standards developed by different companies in the early days. They have the same effect and have their own advantages and disadvantages.
ST and SC connector joints are often used in general networks. After the ST head is inserted, there is a bayonet to fi...
How are optical transceivers classified accordi...
Before, we introduced the classification of optical transceivers and learned that optical transceivers can be divided into video optical transceivers, audio optical transceivers, telephone optical transceivers, digital optical transceivers, Ethernet optical transceivers, etc. Then, if divided acc...
Меры предосторожности для видеооптического трансивера
Video optical transceiver is a kind of equipment that converts video signal to light. It is a kind of transmission equipment, which is widely used and very important. Therefore, there will be a lot of precautions in daily use.Let’s take a look at what are the precautions.
Lightning protecti...
How to prevent lightning damage in fiber optic ...
As we all know, optical fiber is non-conductive and can be protected from inrush current. Optical cable also has good protection performance. The metal components in the optical cable have high insulation value to the ground, and the lightning current is not easy to enter the optical cable. Howev...
What are the product features of industrial-gra...
The emergence of optical fiber helps people transition from normal speed to high speed, especially in certain environments that require high transmission speed, long distance and strong anti-interference performance, optical fiber plays a vital role. So, what is the role of industrial-grade fiber...
What is the working principle of the ring netwo...
The ring network switch works at the data link layer, with a high-bandwidth back bus and internal switching matrix. After the control circuit receives the data packet, the processing port looks up the address reference table in the memory to determine which port the network card (network card) of...
When purchasing an industrial switch, what is t...
The protection level of industrial switches is often referred to as the IP protection index. IP refers to “ingress protection, access protection”, and the protection level is drafted by the IEC (International Electrotechnical Association). So, when we are purchasing industrial switche...
Detailed explanation of serial server applicati...
The serial port server provides the serial port to network function, so that the serial port device can immediately have the TCP/IP network interface function, connect to the network for data communication, greatly expand the communication distance of the serial port device, and have a wide range...
Introduction to the three management methods of...
Switches are classified into managed switches and unmanaged switches according to whether they can be managed or not. Managed switches can be managed through the following methods: management through RS-232 serial port (or parallel port), management through web browser, and through Network manage...
Omnitron launches 10Gig/100Watt Ethernet PoE sw...
Irvine, California — Omnitron Systems, a supplier of Ethernet, Power over Ethernet (PoE) and optical networking products, has launched its next-generation OmniConverter 10Gigabit Ethernet switch product with power over Ethernet (PoE) up to 100W.
The new compact 10 Gb 6 and 10-port Ethernet switch...
Экономят ли коммутаторы PoE энергию?
As we all know, one of the major advantages of PoE power supply is energy saving, but where does energy saving manifest itself?
The PoE switch will automatically adjust the power according to the power supply device. For example, when the temperature of an infrared dome is low, the heating power ...
What are the risks or disadvantages of PoE powe...
1. Insufficient power, the receiving end can’t move: 802.3af standard (PoE) output power is less than 15.4W, which is sufficient for general IPC, but for high-power front-end equipment such as dome cameras, the output power cannot reach To request.
2. Risk is too concentrated: Generally spe...
Office network’s functional requirements ...
Nowadays, with the development of society, many companies have higher and higher requirements on the network, more and more complex systems, many old lines need to be upgraded and upgraded, and the requirements on industrial switches are getting higher and higher. However, many companies do not k...
What is the reason why the FX light of the fibe...
The specific introduction of the fiber media converter indicator:
The fiber media converter has a total of 6 lights, two columns of vertical lights, the three lights near the patch cord are the indicator lights for the fiber, and the 3 lights near the network cable are responsible for the netw...
Роль сетевых коммутаторов в центре обработки данных
A network switch is a device that expands the network and can provide more connection ports in the sub-network to connect more computers. It has the characteristics of high performance-price ratio, high flexibility, relatively simple, and easy to implement. So, what is the role of the network swi...
HDMI optical fiber extender product features an...
HDMI optical fiber extender is a transmission device used to extend the signal, which solves the problem that HDMI audio and video signals cannot be transmitted over long distances and guarantees the quality of signal transmission. So, what are the functional characteristics and specifications of...
What is the difference between a dedicated indu...
Industrial Ethernet switches are placed on the back of the router to expand the router interface to solve the problem of insufficient interfaces. When Ethernet is designed, due to its use of Carrier Sense Multiplexing Collision Detection (CSMA/CD mechanism), its reliability is greatly reduced wh...
What is HDMI fiber optic extender? What are its...
What is HDMI fiber optic extender?
HDMI optical fiber extender is a transmission device used to extend the signal, which solves the problem that HDMI audio and video signals cannot be transmitted over long distances and guarantees the quality of signal transmission. Extenders are generally divide...
The safe transmission distance of PoE power sup...
The safe transmission distance of POE power supply is 100 meters, and it is recommended to use Cat 5e copper network cable. It is possible to transmit DC power with a standard Ethernet cable for a long distance, so why is the transmission distance limited to 100 meters?
The fact is that the maxim...
Как превратить обычный коммутатор в коммутатор PoE？
If you want to turn an ordinary switch into a PoE switch, directly assembling an ordinary switch into a PoE switch cannot fully realize power supply and data transmission at the same time. Unless you know the relevant knowledge of the switch well, you can only meet your needs in other ways , Here...
Можно ли использовать коммутатор PoE как обычный коммутатор?
PoE switch is a new type of multifunctional switch. With the wide application of PoE switch, people have a certain understanding of PoE switch. However, many people think that PoE switches can generate electricity by themselves. This statement is not correct. Generally speaking, PoE switch power ...
Analysis of the characteristics of the Layer 2 ...
The development of the two-layer switching technology is relatively mature. The two-layer industrial switch is a data link layer device. It can identify the MAC address information in the data packet, forward it according to the MAC address, and record these MAC addresses and corresponding ports ...
Каковы преимущества коммутаторов уровня 3?
The technology of the Layer 3 switch is becoming more and more mature and its applications are becoming more and more extensive. In a certain range, it has more advantages than routers, but there is still a big difference between the three-layer switch and the router. In the local area network, t...
Introduction to the working principle of Layer ...
Each network host, workstation or server has its own IP address and subnet mask. When the host communicates with the server, according to its own IP address and subnet mask, as well as the server’s IP address, determine whether the server is in the same network segment as itself:
1. If it i...
POE switch application scheme and functional ch...
PoE switch refers to a switch that can provide network power supply to remote power receiving terminals through a network cable. It includes two functions: network switch and PoE power supply. It is a relatively common power supply device in PoE power supply systems. So, what are the application ...
Почему оптические приемопередатчики следует использовать парами?
Will new customers always ask for a pair of optical transceivers? Yes, in fact, optical transceivers are used in pairs. Optical transceivers are used in optical and electrical converters that use optical fibers as the carrier. The sender and receiver must be the same device.
Why should optical tr...
Введение в оптический приемопередатчик SDH
With the development of communication, the information required to be transmitted is not only voice, but also text, data, images, and video. Coupled with the development of digital communication and computer technology, in the 1970s and 1980s, T1 (DS1)/E1 carrier systems (1.544/2.048Mbps), X.25 f...
Can industrial Ethernet switches be used for ho...
Industrial switches are also called industrial Ethernet switches, that is, Ethernet switch equipment used in the field of industrial control. Due to the network standards adopted, it has good openness, wide application and low price, and uses transparent and unified TCP/IP protocol. , Ethernet ha...
Analysis of several management methods of netwo...
The network-managed industrial switch literally means a switch that can be managed by the network. There are three management methods, which can be managed through the serial port, through the Web, and through the network management software. It provides a terminal-based control port (Console) an...
Что такое оптоволоконный коммутатор Ethernet?
Fiber optic switch is a high-speed network transmission relay equipment, also called fiber channel switch or SAN switch. Compared with ordinary switches, it uses fiber optic cable as the transmission medium. The advantages of optical fiber transmission are fast speed and strong anti-interference ...
Application Analysis of Industrial Switches in ...
Industrial switches are specifically designed to meet the needs of flexible and changeable industrial applications and provide a cost-effective industrial Ethernet communication solution. Industrial switches, as our widely used LAN hardware devices, have always been familiar to everyone. Its popu...
Application market analysis of industrial switc...
In addition to the electric power industry, transportation is the scene where most industrial switches are used. In recent years, the country has invested heavily in transportation projects. At present, the construction of high-speed railways, expressways, and subways in the country are all proce...
Is the optical transceiver better for single fi...
For optical transceivers, whether single fiber or dual fiber is better, let’s first understand what single fiber and dual fiber are.
Single fiber: The data received and sent are transmitted on one optical fiber.
Dual fiber: The data received and sent are transmitted on two-core optical fibe...
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