PDH root-cause analysis

The Optical Transport Manager for PDH 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 PDH network elements” on page 77 and “Root-cause problems for PDH network connections” on page 77 provide more information.