Abstract

SDH transmission mode is a new concept of digital transmission. SDH transmission network can not only improve the efficiency of network management, and can greatly improve the utilization of network resources, reduce the management cost and maintenance cost, to ensure that the network operation and maintenance is flexible operation, reliable and efficient. Social and economic development promotes the development of railway transportation in our country, and the combined railway transportation with communication technology, making up a highly digital railway communication network. In the railway communication network, most of which the transmission technology of SDH transmission network has been adopted. SDH transmission network plays an important role in railway communication network.

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