Difference between traditional optical fiber communication and otn

OTN is an optical transmission network, which evolved from the traditional wavelength division technology. It mainly adds the function of intelligent optical switching, and realizes optical crossover through data configuration without manual fiber hopping. The appearance and development of OTN is the inevitable result of the continuous improvement of optical transmission capacity, and it is a necessary link in the evolution from low-speed electrical layer networking to all-optical networking. Mobile optical transmission network is developing towards large capacity. Especially with the rise of video and multimedia services, networks and applications are developing towards broadband. Fixed access has been fully broadband, and the development of 3G and LTE has pushed mobile communication to the track of broadband.

The all-IP trend of network and services makes the network more flat and integrated, which not only requires the construction of a unified and integrated large-capacity optical transmission network. The three major telecom operators in China are stepping up the construction of optical fiber access, and local radio and television operators are also making every effort to promote the development of optical fiber access through the east wind of triple play. The upgrade and speed-up of access network will inevitably bring the requirement of speed-up of metropolitan area network and backbone network. There are two main advantages of traditional optical fiber: one is slow attenuation, that is, clear _; Second, wide frequency band and large capacity.