Design And Implemention Of Emulation Testing System On PC Base On SDH Light Transmission Network

SDH means Synchronous Digital Hierarchy.SDH formulates frame structure, multiplex, transmission rate rank and interface code of signal,and provides the framework which is supported in the international area.SDH is able to become a kind of flexible,reliable and manageable transmission network.In fact there are thousands of network nodes in SDH transmission network.if we want to test in combination of network,we need a technique to support testing.We table a proposal that veneer software program run on PC and use emulation testing system simulates information transfer during SDH devices,then we can implement testing.The kernel of the system is that simulates information transfer during SDH devices.The system use Server/Client mode,the basic architecture of witch is that SDH veneer software program transfer information to external server and server hand information out.