Difference between DWDM and OTN
OTN optical transport networks are actually DWDM (dense wavelength division multiplexing) and ASON (Automatic Switched Optical Networks). First Huawei Transmission OTN with optical crossability, namely, by loading the WSS ROADM module, MESH network structure can make its composition is similar to that of the ASON equipment, improve the service scheduling flexibility, and increased network security; secondly, OTN electrical crossability, namely each channel sub rate crossability, this part and SDH the effects are similar, but the OTN frame has its own special structure, that is the 2.5G ODU1 particles and 10G particles of ODU2, there are also special for data service of ODU1E and ODU2E.+. Each of the DWDM channels is divided Bohebo and different function plates are required with pigtail connection, OTN can now be configured into port, don’t use so much pigtail connection. Increasing the cross function, omitting the pigtail connection, more flexible and less fault point is more easily maintained.
Besides introducing the difference between DWDM and OTN, many people are confused about the functions of DWDM and what is OTN really used for, in order to solve these problems, we will briefly introduce the role of OTN and its work principle, which allows viewers better to know more about the DWDM and OTN.