Locate Remote Defect Indication Alarms

Purpose

A remote defect indication (RDI) is sent upstream to signal an error condition. There are two types of RDI alarms:

• Remote defect indication line (RDI-L) is sent upstream to a peer LTE when an alarm indication signal line (AIS-L) or low-level defects are detected.
• Remote defect indication path (RDI-P) is sent upstream to a peer PTE when a defect in the signal, typically an AIS-P, is detected.