Alarm analysis – EXFO FTB-8100 Series Transport Blazer for FTB-200 User Manual
Page 195
SONET Tabs
SONET/SDH Application
183
Line RX (SONET)
Alarm Analysis
³
AIS-L (Alarm Indication Signal - Line): The AIS-L alarm is declared
when bits 6, 7 and 8 of the K2 byte contain the “111” pattern in five
consecutive frames.
³
RDI-L (Remote Defect Indication - Line): The RDI-L alarm is declared
when bits 6, 7, and 8 of the K2 byte contain the “110” pattern in five
consecutive frames.
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