1，Riskanda RAISECOM
Ruikangda Technology Development Co., Ltd. focuses on the field of optical fiber broadband access and is committed to the integration of optical fiber technology, Ethernet technology and broadband access technology.
Since the establishment of 1999, it has been growing at an average annual rate of more than 400% for five consecutive years, becoming the main supplier of broadband optical fiber network access equipment in China. ?
In 2004, the company's annual sales exceeded 370 million yuan, and online products exceeded 65.438+0 million units. Won the "Top 500 High-tech and High-growth Enterprises in the Asia-Pacific Region" for two consecutive years.
The company's R&D, production and service systems have all passed the ISO900 1 international management system standard certification.
In addition, the company provides products and services to the international market in more than 30 countries and regions, and has become the overall solution provider of access networks for many mainstream and well-known telecom operators around the world.
2. bonfire
Fiberhome Communication Technology Co., Ltd. was established in 1999. At present, it is the only scientific research and industrial entity in China that integrates three strategic technologies in the field of optical communication.
Approved by the state as "National Optical Fiber Communication Technology Engineering Research Center", "Asia-Pacific Telecommunication Union Training Center", "MII Optical Communication Quality Testing Center" and "National High-tech Research and Development Plan Achievement Industrialization Base".
Fiberhome Communication has long focused on the research and development of the overall solution of communication network from the core layer to the access layer, and has mastered a large number of core technologies in the field of optical communication.
Its scientific research foundation and strength, the conversion rate and benefit of scientific research results rank first in the same industry in China, and it has participated in the formulation of more than 200 national standards and industry standards, covering all fields of optical communication.
In 2002, Fiberhome Communications undertook the "Tenth Five-Year Plan" scientific and technological key project "Research on 40Gb/s SDH Optical Fiber Communication Equipment and System Engineering and Automatic Switched Optical Network", which represented the country's impact on the world's leading technology. ?
3. Putian system
China Putian Information Industry Group Co., Ltd. was established in 1980, formerly known as China Post and Telecommunications Industry Corporation. It is a large central enterprise under the jurisdiction of the State Council State-owned Assets Supervision and Administration Commission, and its product quality has been recognized by the state.
4. Haishuo Hioso
Shenzhen Haishuo Technology Co., Ltd. is a scientific and technological enterprise engaged in the production and research and development of optical communication network products, specializing in the research and development, production, sales and network integration services of all-optical access network equipment and terminal products based on FTTH and FTTD.
The company's products have been verified by the Ministry of Information Industry, and all indicators have reached the national standards. They have also passed the ISO900 1 international quality management system certification, and obtained the telecom equipment network access license issued by the Ministry of Information Industry. This company is a high-tech enterprise in Shenzhen.
5. Gang by gang
Zhejiang Yibang Communication Technology Co., Ltd. (hereinafter referred to as Yibang Communication), headquartered in Hangzhou, is a high-tech enterprise dedicated to the research, development, production, sales and service of data communication, optical fiber transmission system and network access equipment.
Its main product, optical fiber transceiver series, has strong technical strength and market competitiveness.
Purchasing principle:
1, see if you can support full-duplex and half-duplex, because some chips on the market can only use full-duplex environment, but can't support half-duplex. If it is connected to other brands of switches (N-way switches) or hubs, and it is in half-duplex mode, it will definitely cause serious collision and packet loss.
2. See if it has been connected with other optical fiber connectors. There are more and more optical fiber transceivers on the market. If the compatibility of different brands of transceivers is not tested in advance, packet loss, long transmission time and different speeds will also occur.
See if it has a security device to prevent packet loss, because many manufacturers often use register data transmission to reduce costs when making optical fiber transceivers. The biggest disadvantage of this mode is that data transmission will be unstable, leading to packet loss. The best way is to use buffer circuit design to avoid data packet loss safely.
4. See if the product has passed the temperature test, because the optical fiber transceiver itself will generate high heat when used, and its installation environment is usually outdoor, so whether the optical fiber transceiver can work normally when the temperature is too high (not exceeding 50℃) is a very important factor that users need to consider.
In order to make the after-sales service respond in time and early, I suggest you choose a professional company with strong strength, superb technical force and good reputation in the local area. Only the technical engineers of professional companies have rich troubleshooting experience and advanced fault detection tools.
6. When purchasing, carefully observe the appearance of the product to see if the optical fiber module shell of the product is aging, shiny or worn.
In order to make huge profits, many manufacturers use second-hand or old optical fiber modules in optical fiber transceivers, optical fiber switches and other equipment. Products using these second-hand optical fiber modules have caused great hidden dangers to network transmission.
For example, the optical path of optical fiber module is polluted, which will definitely affect the signal transmission and reduce the transmission quality.
However, the decline of transmission quality will also reduce the sensitivity of reception and cause the phenomenon of packet loss. Coupled with the use of second-hand optical fiber modules, the service life will be discounted, and parts will fail at any time.