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随着新DWDM的大量部署，采用高效率、低成本的方式来管理不断更新换代的光网络显得至关重要。这带给运营商的是一个相当大的挑战──虽然各种DWDM技术已经存在，然而至今还没有一个业界所普遍接受的、有关光传送网（OTN）管理的标准。但是随着所谓的数字封装（digital wrapper
With the massive deployment of new DWDMs, it is crucial to manage the ever-changing optical network in an efficient and cost-effective manner. This poses a considerable challenge for operators - although various DWDM technologies already exist, there is by now no standard for optical transport network (OTN) management generally accepted by the industry. But with the so-called digital wrapper (digital wrapper