Sagem ADR 155C Guide D'installation Et D'utilisation page 51

Correlation of faults
A correlation mechanism is implemented on all faults detected.
This correlation mechanism, implemented on each change of information collected, is used to
eliminate faults induced by other faults to facilitate fault finding and fault locating.
The following tables define the faults that are masked for each fault detected in the system..
Key :
X : The fault concerned on the current line is masked by the fault in the current
column.
For example: The LOF fault is masked by fault 2 (LOS).
Correlation of STM1 faults
FAULTS
FAULTS
1 TF
2 LOS
3 LOF
4 AIS (MS-AIS)
5 SD-B2
6 RDI (MS-RDI)
Correlation of MSP faults
FAULTS
FAULTS
1 PAM
2 SCM
3 OTM
Correlation of AU faults
The AU faults are masked by the STM1 LOS, LOF and AIS (MS-AIS) faults.
The TU-LOM fault is filtered, if there is no configured VC12 connection on this STM1.
FAULTS
FAULTS
1 AU-AIS
2 AU-LOP
3 UNEQ (VC4 UNEQ)
4 RDI (VC4 RDI)
5 SLM
6 TU-LOM
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1 2 3 4
TF LOS LOF AIS
X
X X
X X X
X X X
1 2
PAM SCM
X
X
1 2
AU-AIS AU-LOP
X X
X X
X X
X X
Installation and User Guide - N56717020101
2 - OPERATION
5 6
SD-B2 RDI
3
OTM
3 4 5
UNEQ RDI SLM
X
X
X X
6
TU-LOM
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