Relationship

Related Class

Reverse Relationship

Cardinality

Mandatory or optional

API relation

Underlying
Note:

FiberLink must have a LayeredOver/Underlying relationship with onlythose Links (OchLink, OcnLink or Topological Link) that are directly layered overthe FiberLink. For example, a FiberLink that has a LayeredOver/Underlying relationship with an OchLink must not have any Underlying or LayeredOver relationship with the OcnLink that has a LayeredOver/Underlying relationship with the OchLink.

OchLink or

OcnLink or

TopologicalLink

LayeredOver

1:N

O

N

DownstreamLink

FiberLink

UpstreamLink

1:N

O

N

UpstreamLink

FiberLink

DownstreamLink

1:N

O

N

ManagedBy

EMS

ManagesLink

N:1

M

Y

Feeds

All Input Port Classes

FedBy

1:1

M

Y

FedBy

All Output Port Classes

Feeds

1:1

M

Y