Topology

• No Equipment Protection Group is created for Cards or Equipment participating in 1:N Equipment protection.

• In both the SONET/SDH and Low-order SONET/SDH domains, the TMF 814 Topology Adapter is responsible for discovering and setting up the attributes and relationships in the Card/Equipment objects to indicate their participation in the 1:N Equipment Protection scheme.

• In Low-order SONET/SDH, the Equipment/Cards are imported from the SONET/SDH server for those which have a DSTL or Trail running over them. If there is no Trail, that Card does not participate in 1:N Equipment protection.

• The IsProtected attribute indicates participation of the Card/Equipment in the 1:N Protection scheme.

• The Protects relationship specifies which cards this card is protecting.

• The ProtectedBy relationship specifies which card is protecting this card.

• Services or Circuit are layered over the DSTLs related to the Equipment participating in the 1:N Equipment protection scheme. Both the working and the protecting cards layered over the DSTLs.

• The 1:N Equipment protection scheme applies to Cards, for example, DS1, DS3, E1, etc., which are directly interfacing with Client equipment.

• Services may be protected using the 1:N Equipment protection scheme by having one protected side interfacing with the Client protected, while the other side may or may not be protected.

• A Circuit or Trail related to the 1:N Equipment protection group is not discovered by the TMF814 Topology Adapter. It is created independently, after the topology discovery, using TMF 814 Topology Adapter.