Among OTN network interfaces, the internal network interface of the same operator is an intra- domain interface. The intra-domain interface is divided into indirect laVI of different manufacturers'…

Among OTN network interfaces, the internal network interface of the same operator is an intra- domain interface. The intra-domain interface is divided into indirect laVI of different manufacturers' equipment and IrVI of the subnet interface of the same manufacturer's equipment according to different equipment manufacturers.