SONET/SDH root-cause analysis

The Optical Transport Manager for SONET/SDH identifies the following symptoms to diagnose the root-cause problem:

• Failed or removed card, equipment or circuit pack

• Signal degradation

• Link failure

• OpticalNetworkElement down

• Circuit down

• Circuit at risk

  Special analysis is performed for links that connect to devices that are not managed by the Optical Transport Manager. This analysis diagnoses when alarms are due to problems in the connected network rather than in the network managed by the Optical Transport Manager.

  Root-cause problems for SONET/SDH network elements on page 71 and Root-cause problems for SONET/SDH network connections on page 72 provide more information.