The birth of SDH technology has its inevitability. With the development of communication, the information required to be transmitted is not only voice, but also text, data, images and video. In addition to the development of digital communication and computer technology, in the 1970s and 1980s, T1 (DS1)/E1 carrier systems (1.544/2.048 Mbps), X.25 frame relay, ISDN (Integrated Services Digital Network) and FDDI ( A variety of network technologies such as fiber-optic distributed data interfaces. With the advent of the information society, people hope that modern information transmission networks can provide various circuits and services quickly, economically and effectively. The above-mentioned network technologies are only in the original due to the monotony of their services, the complexity of expansion, and the limitations of bandwidth. It is useless to modify or improve within the framework. SDH developed in this context.
Among various broadband fiber access network technologies, access network systems using SDH technology are the most common applications. The birth of SDH solved the problem of the backbone network and user service demand due to the bandwidth limitation of the home media, which caused the problem of access bottleneck between the user and the core network, and increased the bandwidth of the transmission network. Utilization. Since the introduction of SDH technology in the 1990s, it has been a mature and standard technology. It is widely used in the backbone network, and the price is getting lower and lower. The application of SDH technology in the access network can bring huge bandwidth in the core network. Advantages and technical advantages are brought into the access network field, making full use of SDH synchronous multiplexing, standardized optical interfaces, powerful network management capabilities, flexible network topology capabilities and high reliability, and benefiting in the development of access networks. .
SDH is a transmission system whose main functions are the number of transmissions and other functions. It has two major advantages: one is to combine with the increasingly popular intelligent network technology; the second is to rely on fiber transmission technology. However, with the development of the times, the old SDH equipment can't keep up with the pace of the times, and it is more difficult to better meet the needs of customers and do a good job. At present, the local transmission network SDH has a series of problems such as partial overdue, high failure rate and high maintenance cost. Therefore, the SDH transmission equipment is taken out of the network, which is roughly divided into the allocation of new resources, the submission of circuit resource adjustment applications in order, the cable distribution and testing, and the submission of circuit cuts after the test is completed. After receiving the application, the business use department confirms the good and bad, the customer connection feedback and the post-processing six steps.
1 Research goals and significanceAlong with the storm of the third scientific and technological revolution, communication technology has basically penetrated into all aspects of people's lives. The mobile phones, telephones, and network communications we are currently using are the products of the third technological revolution. At the same time, with the rapid development of China's economy and society, the per capita income has been continuously improved, and the requirements for quality of life have been continuously improved. In particular, the requirements for communication technology have been constantly increased, requiring communication products to be informative and automated. Intelligent features. Therefore, the scientific and technological personnel continue to carry out technological innovation and application, hoping to eliminate the old information and data transmission tools and equipment, and update the technical equipment to meet the needs of modern people's quality of life. This puts higher demands on the traditional SDH transmission equipment. At the same time, the market competition is becoming increasingly fierce. For the sake of their own interests, merchants hope to capture the market faster and more effectively through the update of technology and equipment, and bring corresponding response. This is also an important reason for SDH transmission equipment to retreat, which promotes the metabolism of technology and products.
2 Problems with SDH transmission technologySDH transmission technology has brought about tremendous changes in the field of communication. At the same time, with the ever-changing characteristics of the times, today's SDH transmission technology also has problems of big or small.
With the advancement of the times and the continuous development of science and technology, traditional SDH technology is difficult to keep up with the demands of consumers. Mainly in the following aspects: First, the traditional SDH transmission technology market coverage is narrow, which makes customers difficult to use, the difficulty of installation and maintenance of the business; Second, the traditional SDH equipment is obsolete, full of loopholes, and the equipment itself can provide The service is single, the consumer is not satisfied, and the merchant's investment in the later service costs is large, which is not conducive to the long-term development of the company; the third is that the innovative technology research and development of SDH equipment can not keep up, the relevant talents are extremely lacking, this is the SDH equipment Timely “metabolism†has increased the difficulty; finally, as equipment manufacturers have successively withdrawn due to the increased cost of developing SDH services, the number of devices remaining in the market for replacement is lacking. This also puts higher requirements on the replacement of SDH equipment.
3 Measures related to the withdrawal of SDH transmission equipmentBased on the principle of resource allocation and service adjustment, the SDH transmission equipment retreat implementation process can be roughly divided into the following steps.
1) Do a good job of resource allocation for SDH transmission equipment to be retired. In order to smoothly and effectively carry out the work of SDH transmission equipment retreat, it is necessary to allocate resources and overall business in detail, so that the responsible personnel of each part can perform their duties and do their own work. When necessary, institutional regulations can be established. This is the premise and guarantee that SDH can withdraw smoothly. In the preparation process of this part of the work, it is necessary to seriously consider the normal operation of each part, and have the overall situation and overall concept.
2) Do a good job in the classification of transmission and retreat work, and apply for classification. Do a good job in the classification of transmission and retreat work, and apply for work according to the classification. Ensuring SDH's withdrawal from the network can be carried out in an orderly manner. The classification of this part of the work is roughly three: one is the part of the customer's fault retreat; the other is the part of the basic service-related service back-off: the last part is to consider the transmission equipment update and other business needs. While carrying out this part of the work, it is necessary to communicate with the maintenance personnel and dispatchers, and the test work in the trial operation process, so as to ensure the smooth and effective operation of the whole work.
3) Do a good job in cable distribution and testing. After the circuit is issued, the relevant responsible personnel should do the cable release and debugging work. This part of the work has the function of linking up and down, and plays an important role in the whole process of retreating the network. If this part of the work is not done well, it will directly affect the next work, and may also have a fatal impact on the entire exit process. Therefore, in the arrangement of the test work, it is necessary to establish relevant supervision mechanisms and employee reward and punishment systems, so that relevant responsible personnel can pay attention to this work from both thought and action.
4) Submit the circuit cutover application after the test is completed, and the business use department confirms the quality. After completing the test in the third step, you need to submit a circuit cutover request. At the same time, in the implementation of this step, there is a denial of voting rights, which means that the business use department has sufficient power to assume a role of NO, to judge the whole business. In this way, this withdrawal process has a very good efficiency guarantee.
5) Customer connection feedback. This part seems simple and really the most important part. Because the entire business is carried out by the customer, only the customer is satisfied, the whole work is truly completed. And this part of the work needs to be carried out with caution and patience. First, we need to understand the real needs of customers for SDH equipment to retire, and its desired goals for new equipment. At the same time, the customer is carefully explained the reasons why the traditional SDH equipment needs to be retired and the advantages of the new equipment. In addition, explain to the customer how to use the device and related issues that need to be paid attention to during use, and how to do the maintenance of the device yourself. Finally, the customer is required to give us feedback on the health of the equipment.
6) Post processing. After doing some basic work, it is necessary to continuously maintain the SDH equipment to achieve the best use, while maintaining continuous communication with customers, understanding their views and the operation of the equipment. At the same time, do a good job in the later consultation and service.
4 SummarySDH is a transmission system whose main functions are the number of transmissions and other functions. It has two major advantages: one is to combine with the increasingly popular intelligent network technology; the second is to rely on fiber transmission technology. However, with the development of the times, the old SDH equipment can't keep up with the pace of the times, and it is more difficult to better meet the needs of customers and do a good job. At present, the local transmission network SDH has a series of problems such as partial overdue, high failure rate and high maintenance cost. Therefore, the SDH transmission equipment is taken out of the network, which is roughly divided into the allocation of new resources, the submission of circuit resource adjustment applications in order, the cable distribution and testing, and the submission of circuit cuts after the test is completed. After receiving the application, the business use department confirms the good and bad, the customer connection feedback and the post-processing six steps.
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