The Backbone Transmission Network Introduce And Analyse

Transmission system serves as one of important components in modern communication network,it established based on Synchronous Digital Hierarchy(SDH)and Dense Wavelength Division Multiplexing(DWDM).This paper firstly introduced transmission network distributed situation,conceptually awared of nationwide backbone transmission network running condition.Secondly theories,concepts and specific transmission equipments implement methods of SDH and DWDM were introduced.In SDH section,signal frame construction,network element types,ring protection switching mechanism,clock configuration and web master monitoring management were mainly introduced,and practical applications were explained.In DWDM section,network elements organization,network element types and functions,equipment cards functions and alarms processing methods,calculation of cable decrement and abbe number and relay distance setting in project were introduced.Finally according to network actual running condition and personal daily network maintenance managerial experiences,a number of typical network obstacles and alarms processing methods were briefly listed.In this paper,backbone transmission network roughly distributed condition and specific network organization methods can be realized,and types,functions and operating principles of necessary equipment cards used for achieving transmission functions were also realized.Specific experiences explained theory parts in-depth,so can be easily understood.Finally,obstacles processing methods,operation procedure and some practical application problems in network maintenance were illustrated by means of specific cases.