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With the development of the networks, upgrading the 10G to 40G networks is the requirement of networks, But there is a very largest problem to build the cable system when upgrading, especially the short distance transmission of 40G. So in order to solve this problem, 40G QSFP+ SR4 BIDI modules produced by engineers… And today, we will introduce this to you , and hope it can be helpful for you! 1. What is 40G QSFP+ SR4 BIDI ? 40G QSFP+ SR4 BIDI is different from the other 40G QSFP+ modules: Other 40G QSFP+ modules (such as QSFP+ SR4 / LR4) use 8 channels to realize 40G transmission, But the 40G QSFP+ SR4 BIDI just use 2pcs 20G channel to reach this function, every channel can transmit and receive the signal from one multimode cable, But also need notice that 40G QSFP+ SR4 BIDI must be used by pairs. 2. How does it work? To realize the 40G QSFP+ SR4 BIDI transmit the signal, need three steps: Step1: Combining four electrical signal to 2pcs 20G electrical signals;

Do you know 10GBASE Copper-T Module ? It has stable performance, takes full advantage of Copper Cabling. Here we share some knowledge of 10GBASE Copper-T for you, hope it will help you on your work and business. 1. What is 10GBASE Copper-T? It mainly be used in the transmission of 10G Ethernet in Cat 6 or Cat7 Copper cabling systems, meets SFF-8431, SFF-8432 MSA Standard, distance up to 30M. 2. 10GBASE Copper-T VS SFP+ Optical Transceiver   10GBASE Copper-T SFP+ Transmission Media UTP Optical Fiber Connector RJ-45 LC Transmission Distance 30M >100M Cabling system Copper Cabling Optical Cabling Transmission Speed 10Gbs 10Gbs a. 10GBASE Copper-T with RJ-45 Connector, be used in Cat6 or Cat7 Cabling, and the Copper Cabling cost is lower than the Optical Cabling cost. b. 10GBASE Copper-T can be used in the Copper Cabling systems directly, and SFP+ Modules need to use some equipment, like Ethernet Switches, Media Converters, etc,. It wo

Fiber Media converters play an important role in today’s muti-protocol, mixed media networks. Because of Fiber media converters, it provides convenient flexibility for your network design, making your network compatible with copper and fiber. So the fiber media converter solutions is considerably more economical. 1.Two types ports of Fiber Media Converter A fiber media converter is used to extend copper UTP Ethernet cabling to distances beyond the 100m max for UTP, by converting the signals to fiber optic cabling. Media converters have two types of ports. One for copper and the other for fiber. In terms of fiber ports, there are two types. One for Optical transceivers (SFP, XFP, etc), the other for fiber optic patch cables (SC, ST, etc). The copper ports, are all designed for RJ45. 2.How to use Fiber Media Converter in your network? Since fiber media converter is used to convert fiber between copper, in one fiber media converter application scene, we usually use fib

In recent years, customers require more and more flexible and scalable I/O solutions to meet the rigorous requirement of different deployments. 10G SFP+ DAC cables meets the demanding needs for today’s data center environments. Moreover, price, performance and flexibility have made 10G SFP+ Cable an attractive choice for the data center. Today we would like share some knowledge of 10G SFP+ DAC cable with you, hope it would help your business or market sharing enlargement. 1. What’s 10G SFP+ DAC Cable? DAC means Direct Attach Cable . 10G SFP+ DAC Cable is a copper interconnect using an inexpensive Twinax copper cable assembly with SFP+ connectors on both sides based on SFP+ MSA(multi-source agreement). It has the advantage of low power, low cost and low latency. 2.10G SFP+ DAC Cable type? 10G SFP+ DAC Cable uses a copper 10G cable that comes as active or passive Twinax cable assembly and connects directly into an SFP housing. 10G SFP+ Active Cable have a silicon c

What is collaborative learning? Collaborative learning is a situation in which two or more students learn or attempt to learn something together, in one group. Unlike individual learning, students engaged in collaborative learning capitalize on one another’s resources and skills (asking one another for information, evaluating one another’s ideas, monitoring one another’s work, etc.).  It makes the learning more effective and active. Currently, it is widely utilized in American and European schools. Teachers like this model of teaching as it makes the students interactive and positive between team members. It stimulates the thoughts and open the mind for students because they can learn from other mates simultaneously. How to exam the effects of collaborative learning? Usually, teachers test the results of collaborative learning by conversation analysis and statistical discourse analysis. Thus, collaborative learning is commonly illustrated when groups of students

1. Material: The normal school desk & chairs usually come with the following three products, Pure Wooden desk chair (Solid wood processing students desks, currently used in non-urban areas); Steel & wood desk chair (Steel and plastic as a product of the stent, top is melamine panels); Steel plastic desk chair (Plastic alloy materials, mechanical molding by the school desks and chairs products) JS Education mainly produce the steel & wood and steel & plastic models school desk chairs. 2.  Performance: Primary and secondary schools for the commonly used flat desk (height adjustable desk chair and fixed desks and chairs), University has auditorium desk chair, Reading room desk and so on. Height fixed desks and chairs as blow HY-0235 model height adjustable desk ch ai r as below HY-A105 model 2. Moisture-resistant, water-resistant When students clean tables and chairs, the desktops are exposed to water. Because of the small student stre

The metal oxidation process is the Rapid Prototyping surface with oxygen or oxidizing agent to form protective oxide film , It can prevent metal corrosion. There are two kind of Oxidation: chemical oxidation and electrochemical oxidation (as anodizing). (1)The oxide film is thin that processing by chemical oxidation, Its thickness is about 0.3-4 um, There are porous, It has good adsorption ability, and It is soft and didn’t wear-resisting, , It suitable for places that have shielding requirements  because it has good conductive performance, and It could coating variety of colors because it have good adsorption ability, If painting on the surface more, It can improve effectively the corrosion resistance and decorative of aluminum products . (2)The oxide film is thick that processing by anodizing , Its thickness is about 5-20 v m, The thickness of hard anodizing film can be up to 60-2500 vm, It has high hardness, good wear resistance, good chemical stability, good

Rapid prototyping is the first step to verify the product feasibility, is the most direct and effective way to find out product design flaws, thus to targeted improvement of defect, until hand-board model doesn’t have any problem to open mold as the basis. It is usually necessary to carry out small batch complex test, investment promotion and even test the assembly difficulty in future mass production. Main USES: 1. Appearance molding: it is mainly used to test the product appearance size, color matching, material matching, cost evaluation, market survey, exhibition and exhibition of the same amount of technical feasibility analysis and judgment. 2. The structure forming: mainly used for the fit between the internal structure of assembly product, material strength analysis, performance testing, cost evaluation, new product investment promotion, etc., thereby significantly reducing the risk of direct mould. 3. Vacuum complex: it is mainly used to detect the perfo

Rapid prototyping technology , also known as rapid prototyping ( RP technology ); RAPID PROTOTYPING (RP technology), or RAPID PROTOTYPING MANUFACTUREING( RPM). Rapid prototyping (RP) technology is an advanced manufacturing technology developed in the ninety s, is the new product development services for manufacturing enterprise of a key generic technology, to promote enterprise product innovation, shorten new product development cycle, improve product competitiveness has a positive role in promoting. Since the advent of the technology, it has been widely used in manufacturing in developed countries, resulting in a new technology field. RP technology is developed on the basis of modern CAD/CAM technology, laser technology,  rapid CNC maching technology , sophisticated servo drive technology and new material technology. Different kinds of rapid prototyping systems are different because of different forming materials. But the basic principle is the same: “layered manufacturi

If you are the first time to buy optical transceivers, you might be confused with “DDM”, “DOM” or “RGD”. What are they? Today, ETU-Link will describe in detail the functions of these three types of optical modules. What is DDM? DDM means Digital Diagnostic Monitoring. It is the technique used in the optical module so that users can monitor the real-time parameters of the module. Including modules’ working temperature, working voltage, working current, TX and RX Power etc , can also show the factory information of the optical transceiver, prompt warning/alarm. The DDM function of the module can provide a performance monitoring tool for the system, can help the system manage and predict the life of the module, isolate the fault system and verify the compatibility of the module in installation. What is DOM? DOM means Digital Optical Monitoring. Its function is similar to DDM, allows you to monitor all aspects data of optical module in real time. Such as modules’ trans

Optical fiber splitters play an increasingly important role in today’s optical networks. From the FTTx system to the traditional optical network, it can not only enable many users to share an optical fiber interface, but also can help users extend the function of optical network circuits. Today we’ll give you a brief introduction to fiber splitter. With the continuous development of modern technology, a variety of optical fiber splitters appear on the market. The two most common types: FBT fiber splitter and PLC fiber splitter In addition to the size and appearance of the difference, there are many differences in other places. 1. Material FBT optical fiber splitter is made of steel, optical fiber, heat shrinkable tube and other common materials. Because the cost of these materials is not high, device manufacturing technology is relatively simple, so the price of FBT fiber splitter is cheaper. And the technology of PLC fiber splitter is more complicated and expens

Do you know this type of Smart Phone as below? Yes! It’s Iphone X. It’s very popular these days in China, and the world. Do you have one? If not, maybe you should have one. And do you know what’s ESPB2392-3LCD10?  And what’s the connection between Iphone X and ESPB2392-3LCD10? Now we will show you with the picture!                   ESPB2392-3LCD10  is the optical transceiver produced by ETU-link Technology Co., LTD. It’s used on Switch, like Cisco, Huawei, Juniper, HP, Avaya, Mikrotik, etc,. And it means, 1 0G SFP+ BIDI Tx1270/Rx1330nm 10KM LC Connector with DDM . About ESPB2392-3LCD10 ※ Price: ETU-Link are as a very professional manufacturer in the Optical Fiber market, and the price is very competitive . ※ Quality : To ensure the quality and the stability, all modules will be tested before the shipment, including Material testing, Product parameter testing, Distance testing, Switch testing, and Aging testing. ※ Certification: Passed ISO9001 quality system certifi

In today’s era of big data, there is more and more demand for high speed and high bandwidth, eager to have a new product as the main transmission medium for high performance computing and data center, so the active optical cable (AOC) was born in this environment. Today, ETU-Link will introduce some knowledge about active optical cable in this blog. 1.Which is AOC? AOC is the short of Active Optical Cable , and it looks like the copper cable, but different in the using transmit types and environment. Also, AOC use a optical cable to connect two higher density connectors, and you can check is as the following: 2. Advantages of AOC: a. Lower power consumption;   b. Small volume; c. Light weight ; d. Strong heat dissipation; e. Long transmitt distance; f. No pollution for the connection port; g. Good stability. 3. Application for AOC: a. AOC applied on the Switches:  40G QSFP+ AOC to 4* 10G SFP+ AOC can connect 2pcs 40G Switches, and it can also connect the 10G sw

1、 Chronic ischemic disease Arterial circulation disorders: various organic disease caused by atherosclerosis. Ischemic encephalopathy caused by cerebral atherosclerosis: TIA, cerebral infarction, brain embolism. Ischemic heart disease caused by atherosclerotic heart: coronary heart disease, angina, myocardial infarction, myocardial ischemia. Ischemic peripheral vascular disease caused by peripheral atherosclerotic lesions: lower limb arteriosclerosis locked-in syndrome and intermittent claudication. Ischemic renal disease caused by atherosclerotic renal artery stenosis: secondary hypertension, renal hypofunction. Secondary diseases of intestinal function decline caused by mesenteric arteries 2、Acute and chronic infectious disease Antibiotics and chemotherapy drug resistant bacteria, virus and fungus, parasitic infection, such as giardiasis and cryptosporidiosis are treated by Cuban doctors with ozonized oil. 3、 Ozone therapy can be applied in emergency circumstances, such

“Double Fish Cup”2017 table tennis tournament is going on in more ten cities in all over China recently. Vietnam is the first country, which also attend to hold the “Double Fish Cup” in overseas. Vietnam division was held in Ho Chi Minh City in November 3-4. The final of the event will be held in December 2-3 in Guangzhou China. “Double Fish Cup” in Vietnam also is warmly welcomed by the local people and it is held successfully in Ho Chi Minh City. The double fish delegate was invited to attend the “double fish cup” in Vietnam division. The ITTF Asia pacific marketing manager, the national association chairman of Vietnam, the National table tennis term and media from Vietnam attended the press conference and open ceremony. The champion from Vietnam and the champions from other cities in China will come to attend the “Double Fish Cup” final in Guangzhou, which will be held in December 2-3.

With the rapid development of information technology, the application of optical communication has become more and more popular. With the advantages of large capacity and high-speed transmission, Fiber Optic Transceiver Modules is playing a more and more important role. Where there is fiber, the optical module is needed, and the selection and purchase of the optical module has become the focus of the front-line engineering technicians or purchasing personnel. There are many types of optical transceivers on the market, often dazzling. So, how to choose the most suitable module in many different speed, different packaging, different functions of the Optical Transceiver Module ? We will give you some tips. ◆ Choose the module based on your usage environment How fast the speed of transmission you need? 155M, 1G, 10G or 100G? The higher transmission rate means higher cost investment. For example, the application environment of FTTH, it's enough to use about 1G spe

Most of girls all like bags ,since it can match cloth ,also can make them feeling happy .Of course ,they also hope have a bag that only belong to them .  Fuzhou Anter decoration co.,Ltd ,a bags company for more than 7 years .it is has their own producing line and workers . Export goods around the world . Such as Europe ,Asia , America..and so on .. Bag material can be different ,for example Pu ,canvas ,PVC ...will be done as you want .Also about the price ,we can according to your request do the different quality bags . Printing canvas bag is one of our bags ,popular bag around teenage now. It is has passed many quality test .Also we have BSCI certificated who have professional team workers and machine . We can control printing color seriously and we have our own check department. Beside that, our canvas bag can print your own design, we can help you to make design if your company don ’ t have designer. What ’ s more, we can ’ t sell your design to other custome

The customers Mr. Peter and Ms. Yana from Russia visited our factory in Oct.13,2017. Sports master has cooperated with double fish for more than 10 years. Mr. Wu, vice general manager of Double fish represented our company warmly welcome them to visit, and introduction the history of double fish and the honors which double fish have obtained from all kinds of departments. The head from sales department, technical department and workshop attended the meeting to discuss all kinds of issues.This time, Mr. Peter and Ms. Yana visited the whole production line of racket, pay attention to the quality control and material test etc, they are very satisfied with the double fish production quality control and material test equipments, devices and the method to process. Especially, the customers are interested in the table tennis table , they visited the coating, printing process, the quality control process and packing. The outdoor table tennis table is the main issue to discuss in the meetin

Guangzhou Double fish Sports Goods Co., Ltd., and Guangzhou Tianhe sports center both are National Pilot Base of Sport Industry. The two parties co-built a “Double Fish Children Table Tennis paradise” in September 2017. This is the first Children table tennis paradise which equipped with special Children table tennis tables for outdoors use. The table tennis paradise occupied 1100 square meters, equipped with 28 sets of table tennis tables, item no.: C-1 Children table tennis table which they are designed for Children specially. The size and height of the table tennis tables are designed basing on Children of all ages. The table tennis tables are suitable for outdoor use. The tables made with new materials, suitable for outdoors, safety and durable. The paradise also equipped with double fish flooring rubber. The Double Fish Children table tennis blades are also designed for Children training and entertainment. Double fish table tennis table and table tennis blade for Childre

Imagine that solar panels can keep the maximum efficiency by getting rid of dust? Such a technology may soon become a reality. Researchers at the University of Eindhoven and the University of Humboldt, the Netherlands, have developed a polymer film that can vibrate when exposed to sunlight and can be used as a coating on a solar cell in a desert area. This flexible thin plastic contains a kind of organic compounds called azo dyes. "Under the action of visible light, photoreceptors can bend and stretch, because these molecules are constrained by the crystalline polymer network and will cause the material to vibrate," said Michael Debije, a researcher at Eindhoven University of Technology. In previous studies, the researchers have developed a moving material that is moving at specific UV intensities. In contrast, this new material only needs pure natural sunlight. The results of the study recently published in the "natural communication" on. Article from All In