Physical and logical connection classes

The following classes are used to model connections in the Optical Transport Manager for WDM:

• FiberLink---Unidirectional physical link

• OchLink---Unidirectional link at the OCH layer

• OcnLink---Unidirectional link at the OCN layer

• TopologicalLink---Bidirectional link that is carrying a client service across the WDM network

• ClientCircuit ---Unidirectional link traversing the WDM domain

• ClientTrail---Unidirectional link carrying a segment of the ClientCircuits

  Special treatment is given to band-multiplexers, which are passive devices with no alarms associated with them. This is described in “FiberLink used in modeling band-multiplexer” on page 59.

  The connection classes are described in the following sections.