Its main advantages are as follows:
① Standard hierarchy: OTN hierarchy standard includes multiplexing hierarchy, which accurately defines how low rate signals can be upgraded to higher rate payloads. This enables the WDM platform to transfer directly to low rate services in 10Gbps, 40Gbps or 100gbps transmission networks without external wavelength demultiplexing and manual interconnection.
② Transmission capacity expansion: operators deploying OTN network can use the least network infrastructure to achieve high-quality services and provide high-capacity infrastructure for local area network, metropolitan area network and broadband service access network.
③ Reduce cost: OTN network can transmit multiple clients on a single wavelength, and keep its specific requirements, which can ensure effective bandwidth utilization while reducing the overall transmission cost.
④ Flexibility of scheduling: building an OTN network can not only support the technologies needed for the current network transmission, but also prepare for the future according to the needs of the business. It can be easily extended to the ring network and mesh network through end-to-end scheduling.
⑤ Transparent transmission: transparent transmission is very important for service providers who provide multi service transmission. The transparency of OTN enables the network to carry any service without disturbing the timing of clients, including Ethernet, storage, digital video, SONET / SDH, etc.
