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This article mainly introduces what are the differences between ptn and otn, the article is very detailed, has a certain reference value, interested friends must read it!

OTN is an optical transmission network, which evolves from the traditional wavelength division technology, and mainly adds intelligent optical switching function, which can realize optical crossover through data configuration without artificial fiber hopping, while PTN is a packet transmission network, which is the product of the integration of transmission network and data network, and the main protocol is TMPLS.

PTN: packet transmission network

PTN is an enhanced version of MSTP, and the channel is resilient. PTN is tailor-made for the transport network, requires network management to configure routing, there is no IP function, that is, the core network equipment needs to configure Netlist. IPRAN, another brother of PTN, carries the banner of IP, and routes can be calculated by themselves. The PTN separates the control plane from the transport plane, while the IPRAN is still negotiated by the device. PTN plus SDN tools can be said to add to the power of a tiger.

PTN is the product of the integration of transport network and data network. The main protocol is TMPLS, which has less IP layer and more overhead packets than network devices. Ring networking and protection can be realized. It is a telecom-grade data network (the traditional data network can not meet the telecom-level requirements). The transmission bandwidth of PTN is smaller than that of OTN. Generally, the maximum group path bandwidth of PTN is 10G, the group path can reach 400G-1600G, and the latest technology can reach 40G single wave. Is the backbone of the transport network.

OTN: optical transmission network

OTN is a network that uses optical transmission to work for the lowest level. It can transmit PTN and IPRAN services. Its function is to make the optical transmission capacity larger, the speed faster, the distance longer and the transmission more reliable.

The rate of OTN is determined by the frame structure OTMn.m of 10G/40G/100G/200G/400G, and even the following 1T Magi OTN, where n is the wavenumber and m is the rate, where m is the specification from 10G to 100G.

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