Test Results
234 MAX-800 Series
Alarms/Errors Overview
OTUx
Note: Available for OTU4, OTU2 and OTU1.
Alarms
AIS (Alarm Indication Signal) available with serial interfaces only.
RX: Polynomial number 11 (PN-11) is over all OTU frame bits including
FAS and MFAS for at least 3 consecutive 8192 bit-interval.
TX: Generates polynomial number 11 (PN-11) over all OTU frame bits
including FAS and MFAS continuously.
BDI (Backward Defect Indication)
RX: The BDI bit in the SM overhead field (byte 3, bit 5) is “1” for at least
5 consecutive OTU frames.
TX: Generates “1” for the BDI bit in the SM overhead field (byte 3, bit 5)
continuously.
BIAE (Backward Incoming Alignment Error)
RX: The BEI/BIAE bits in the SM overhead field (byte 3, bits 1 to 4) are
“1011” for at least 3 consecutive frames.
TX: Generates “1011” for the BEI/BIAE bits in the SM overhead field
(byte 3, bits 1 to 4) continuously.
IAE (Incoming Alignment Error)
RX: The IAE bit in the SM overhead field (byte 3, bit 6) is “1” for at least
5 consecutive OTU frames.
TX: Generates “1” for the IAE bit in the SM overhead field (byte 3, bit 6)
continuously.
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