Design And Implementation Of SDH Networking And Protected Mode In CNC Shanghai MAN

As an all new transmission network system, SDH network is the comprehensive information network that combines with the transmission and the switch automated managed by the network management system. As the largest converged communications network, telecommunications network, has already progressively accepted SDH. Along with the high development of the national politics, economy and the civilization, the standard required of the telecommunication customers is also getting higher and higher to the communication. This leads to the telecommunication carrier continuously enhances the network the reliability and the safety. The rationality of the network design and the network mode will define the quality of the network service which delivered to the customers by us.This article focus on theoretically searching in SDH principle, SDH network and the way of protecting the network. Illustrating the reconstruction project with four offices access network(Lekai,Jinniu,Minhang and Haiyun) , integrating the real situation, after analysis and comparing with several sets of upgrading program and based on an overall consideration of the reliability of network, capability for sustainable development and the cost of construction, it provides a reasonable design for the network upgrading.Finally, it offers a test plan and details which are necessary for acceptance checking of the network performance construction for SDH equipments. Besides, it provides the summary of the network design and the next step new searching direction of SDH networks.