EXFO IQS-8100 Series Transport Blazer for IQS-600 - Manual (Page 217)

OTN Tabs
SONET/SDH Application 203
OPU RX
OPU RX
Press TEST, ODUk, and OPU (under ODUk RX).
Alarm Analysis
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OPU-PLM (Payload Mismatch): OPU-PLM is declared when the
Payload Structure Identifier (PSI) field do not match the expected PT
for at least 3 consecutive frames. See Enable OPU-PLM on page 204.
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OPU-MSIM (Multiplex Structure Identifier Mismatch): OPU-MSIM is an
HO alarm that is available for multiplexed test case only. OPU-MSIM is
declared when the RX Payload Structure Identifier (PSI) information do
not match the expected HO Multiplex Structure Identifier configuration
defined from the test case setup.
Enable OPU-MSIM allows enabling the OPU-MSIM alarm analysis.
LO
HO