EXFO FTB-8100 Series Transport Blazer for FTB-200 - Manual (Page 220)

SONET Tabs
208 FTB-8100 Series Transport Blazer
LOP RX (SONET)
Alarm Analysis
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AIS-V (Alarm Indication Signal - VT): The AIS-V alarm is declared when
V1 and V2 bytes for the VT path contain an all-ones pattern in three
consecutive superframes.
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LOP-V (Loss Of Pointer - VT): The LOP alarm indicates that a valid
pointer is not found in N consecutive superframes (where 8 ≤ N ≤ 10),
or if N consecutive NDFs (“1001” pattern) are detected.
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RDI-V (Remote Defect Indication - VT): The RDI-V alarm is declared
when bit 8 of the V5 byte contains “1” in five consecutive VT
superframes while bits 6 and 7 of the Z7 byte contain the “00” or “11”
pattern.
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RFI-V (Remote Failure Indication - VT): The RFI-V alarm is declared
when bit 4 of the V5 byte contains “1” in five consecutive superframes.
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TIM-V (Trace Identifier Mismatch - VT): The TIM-V defect indicates that
the received J2 Trace doesn’t match the expected message value. The
TIM-V alarm is only available when Enable TIM-V check box from J2
Trace section has been selected.
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The TIM-V alarm result is only available when TIM-V from J2 Trace
section has been enabled.
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PLM-V (Payload Label Mismatch - VT): The PLM-V is declared upon
receipt of five consecutive superframes with mismatched VT Signal
(bits 5 through 7 of the V5 byte are “000”, “001” or “111”).
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UNEQ-V (Unequipped - VT): UNEQ-V is declared when bit 5 through 7
of the V5 byte contain “000” for five consecutive superframes.
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ERDI-VSD (Enhanced RDI - VT Server Defect): The ERDI-VSD alarm is
declared when bits 5, 6, and 7 of the Z7 byte contain the “101” pattern,
and bit 8 of the V5 byte contain “1”, in five consecutive VT superframes.