Test Results
MaxTester 227
Alarms/Errors Overview
ODUx
Note: For OPUx alarms see page 232.
Alarms
AIS (Alarm Indication Signal)
RX: The STAT information in the PM byte 3, bits 6 to 8 is “111” for at
least 3 consecutive frames.
TX: Generates an all "1"s pattern in the entire ODUk signal, excluding
the frame alignment overhead (FA OH), OTUk overhead (OTUk OH)
and ODUk FTFL.
BDI (Backward Defect indication)
RX: The BDI bit in the PM overhead field (byte 3, bit 5) is “1” for at least
5 consecutive frames.
TX: Generates a “1” in the BDI (byte 3, bit 5) of the PM overhead field
continuously.
BSD (Backward Signal Degrade)
RX: The FTFL byte 128 is “00000010”.
TX: Generates a “00000010” pattern in the FTFL Byte 128 continuously.
BSF (Backward Signal Fail)
RX: The FTFL byte 128 is “00000001”.
TX: Generates a “00000001” pattern in the FTFL Byte 128 continuously.
FSD (Forward Signal Degrade)
RX: The FTFL byte 0 is “00000010”
TX: Generates a “00000010” pattern in the FTFL Byte 0 continuously.
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