| SDH is one kind the multiple connection, the line transmission and the exchange function merges into one organic whole, and by the unification network management system operation comprehensive information transmission network, is synchronized light network which American Bell Communication Research institute raises. The international telephone telegram inquiry board has accepted the SONET concept and the again naming in 1988 is SDH, not only causes it to become is suitable is also suitable for the optical fiber for the microwave and the satellite transmission general technical system. It may realize the network effective management, the real-time service monitoring, the dynamic network maintenance, intercommunication between the different manufacturer equipment and so on many functions, can raise the network resources use factor greatly, reduce the management and the maintenance cost, the realization nimble reliable and the highly effective network movement and the maintenance, therefore is now the world information field in the transmission technology aspect development and the application hot spot, receives the people widely to take.Due to the original transmission network equipment of FuXingMen communication agency and the local communication agencies is obsolete and the communications business volume is small. It has not been able to satisfy the current high rate, high integration of new business requirements. So by this expansion project of ring network, expanded the communication capacity of FuXingMen communication agency and the local communication agencies, updated the transmission equipment performance, established a ring network with a larger and more effective business capacity. To make the domestic communication center of the biggest gathering center, can play a bigger role to connect the communications of local communication agencies.This project systematically discusses and analyses the design of the Ring network and its expansion project based on SDH technology. |
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