In the network interface of OTN, the network interface within the same operator is the intra- domain interface, which is further divided into the interface between equipment from different…

In the network interface of OTN, the network interface within the same operator is the intra- domain interface, which is further divided into the interface between equipment from different manufacturers, IaVI, and the interface within the subnet of equipment from the same manufacturer, IrVI, according to the different equipment manufacturers.