EXFO FTB/IQS-88000 Series Power Blazer for FTB-2/2Pro/500/IQS-600 - Manual (Page 300)

Test Results
288 FTB/IQS-88000 Series
Alarms/Errors
OPUx
Note: OPUx is displayed under ODUx alarms/errors group.
Alarms

AIS (Alarm Indication Signal) is only available on the OPU client signal
(designated as LO in the standard).
RX: A PRBS11 pattern is received indicating a failure of the client
signal.
TX: Generates a PRBS11 pattern.

CSF (Client Signal Fail) is only available on the OPU client signal
(designated as LO in the standard).
RX: Bit 1 of the OPUk PSI[2] byte is set to “1” indicating a failure of the
client signal mapped into the OPUk of the OTN signal.
TX: Sets the bit 1 of the OPUk PSI[2] byte to “1”.

MSIM (Multiplex Structure Identifier Mismatch) is available for the high
oder path of a multiplexed test case only.
RX: The RX Payload Structure Identifier (PSI) information do not match
the expected HO Multiplex Structure Identifier defined.
TX: Corrupts the content of the PSI
For PT20: Bytes 2 and 3 for ODU0 in ODU1, bytes 2 to 5 for ODU1 in
ODU2, and bytes 2 to 17 for ODU2 in ODU3.
For PT21: Bytes 2 to 9 for ODU1 in ODU2, and bytes 2 to 33 for ODU2 in
ODU3. Not applicable for ODU0.

PLM (Payload Mismatch) is available when OPU-PLM check box is
selected.
RX: The Payload Structure Identifier (PSI) field does not match the
expected PT for at least 3 consecutive frames.