Level-specific
alarms
This screen contains detailed alarm and error information related to the OTN
layer. Status is indicated by the use of colored lamp icons.
If the ODUk is multiplexed, touch the relevant OTU/ODUk level button.
Alarms
OTU Alarms
LOS: Loss of Signal.
OTU-AIS: Optical channel Transport Unit Alarm Indication Signal.
LOF: Loss of Frame
OOF: Out of Frame
LOM: Loss of Multiframe
OOM: Out of Multiframe
SM-TIM: Section Monitoring Trail trace Indicator Mismatch
SM-BIAE: Section Monitoring Backward Incoming Alignment Error
SM-BDI: Section Monitoring Backward Defect Indicator
SM-IAE: Section Monitoring Incoming Alignment Error
ODU Alarms
LOFLOM: Loss of Frame and Loss of Multiframe
ODU-AIS: Optical channel Data Unit Alarm Indication Signal
ODU-LCK: Optical channel Data Unit Locked Signal
ODU-OCI: Optical channel Data Unit Open Connection Indication
PM-TIM: Path Monitoring Trail trace Indicator Mismatch
PM-BDI: Path Monitoring Backward Defect Indicator
PLM: Payload Mismatch
FSF: Forward Signal Fail
FSD: Forward Signal Degrade
BSF: Backward Signal Fail
BSD: Backward Signal Degrade
MSIM: Multiple Structure Identifier Mismatch
CI-AIS: Characteristic Information Alarm Indication Signal
CSF: Client Signal Fail
LSS: Link Status Signal
TCM Alarms
TIM: Trace Indicator Mismatch
BIAE: Backward Incoming Alignment Error
BDI: Backward Defect Indicator
IAE: Incoming Alignment Error
LTC: Loss of Tandem Connection
Errors
OTU Errors
FAS: Frame Alignment Signal
MFAS: Multiframe Alignment Signal
SM-BIP8: Section Monitoring Bit Interleaved Parity 8
SM-BEI: Section Monitoring Backward Error Indication
FEC corrected: Forward Error Correction Corrected
FEC uncorrected: Forward Error Correction Uncorrected
ODU Errors
PM-BIP8: Path Monitoring Bit Interleaved Parity 8
PM-BEI: Path Monitoring Backward Error Indicator
OPU Errors
Pattern error: Bit error detected in the payload
TCM Errors
TCMi-BIP8: Bit Interleaved Parity 8
TCMi-BEI: Backward Error Indication
(i=1 to 6)
GMP Errors
CRC8 error: CRC8 error occurred
CRC5 error: CRC5 error occurred
Inc over: C
m
(t) value exceeds the upper limit.
Dec over: C
m
(t) value exceeds the lower limit.
GFP Errors
cHEC correctable: core Header Error Check Correctable
cHEC uncorrectable: core Header Error Check Uncorrectable
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