The OptiX 155/622H (referred to as Metro1000 ) supports network topologies such as chain, ring, ring tangent, ring intersection, ring with chain, and hub at STM-1, STM-4, and STM-16 levels.

The OptiX 155/622H supports the network types and topologies shown in Table 1.

Table 1 OptiX 155/622H Supported Networking Types and Topology Diagrams

Network Type	Topology Diagram
Chain
Ring
Ring tangent
Ring Intersection
Ring with Chain
Hub