With the rapid development of global communication, the role of communication network is becoming more and more important. At present, DWDM and OTN(Optical Transport Network) technology has been widely applied in Network communication construction. DWDM technology greatly improves the transmission capacity of Optical fiber Network, but it is insufficient in Optical domain signal processing and business scheduling, unable to meet the high standard requirements of broadband data service. As an evolutionary product of DWDM technology, OTN has a variety of customer signal packaging and transparent transmission, large particle bandwidth reuse, flexible crossover and configuration scheduling, strong overhead and maintenance management ability, and enhanced networking and protection capabilities. OTN equipment has gradually replaced DWDM equipment with its unique advantages.
With the continuous growth of information level and service bandwidth, OTN, as a derivative product of DWDM, inherits and combines the advantages of SDH and WDM, and expands the networking function suitable for service transmission requirements. In the network application, scheduling ability, business access ability, network management monitoring ability have been significantly improved, can meet the requirements of new business quality.
