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OTN,也称为OTH(Optical Transport Hierarchy),结合了光域和电域处理的优势,能提供巨大的传送容量、完全透明的端到端波长/子波长连接以及电信级的保护,是传送宽带大颗粒业务最优的技术。从居于核心地位的G.709协议中可以看出,OTN跨越了传统的电域(数字传送)和光域(模拟传送),成为管理电域和光域的统一标准。OTN处理的基本对象是波长级业务,将传送网推进到真正的多波长光网络阶段。
OTN, also known as Optical Transport Hierarchy (OTH), combines the advantages of optical and electrical domain processing to provide huge transmission capacity, completely transparent end-to-end wavelength / sub-wavelength connection and carrier-class protection, Large particle business the best technology. From the core G.709 agreement, it can be seen that OTN crosses the traditional electric domain (digital transmission) and optical domain (analogue transmission), becoming the uniform standard for managing electric and optical domains. OTN processing is the basic object of wavelength-level business, the transport network to the real multi-wavelength optical network phase.