碧蓝航线 小海狸中队:谁帮我把以下资料翻译成英文？（用软件翻译 不准确的不给分）

1.SDH的概念
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 the American Bell communication research institute raises.The international telephone telegram inquiry board (CCITT) (presently ITU-T) has accepted the SONET concept and the again naming in 1988 is SDH,causes it to become not only is suitable also is suitable for the optical fiber for the microwave and the satellite transmission general technical system.It may realize network effective management, real-time service monitoring, dynamic network maintenance, between the different merchant equipment exchanges and so on many functions can raise the network resources use factor greatly, reduce the management and the maintenance cost, the realization is 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.