Research On Digital Synchronize Network Based On Four-fiber Self-healing Ring

With the development of Shanxi Power grid construction, electric power telecommunication SDH network becomes more and more maturity.In order to improve the reliability of the network, Shanxi Power grid reforms its network to four-fiber self-healing ring. This paper discusses the variety of the network in Shanxi, and coordinates about synchronous mode, talks about the necessity of consideration about synchronization factor so as to improve the reliability of the network.