Sagem ADR 155C manual Correlation of faults, Correlation of STM1 faults, Correlation of MSP faults

2 - OPERATION

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	1		2	3	4	5	6
		FAULTS	TF		LOS	LOF	AIS	SD-B2	RDI
	1	TF
	2	LOS
	3	LOF			X
	4	AIS (MS-AIS)			X	X
	5	SD-B2			X	X	X
	6	RDI (MS-RDI)			X	X	X
Correlation of MSP faults
		FAULTS		1		2		3
		FAULTS	PAM			SCM		OTM
	1	PAM
	2	SCM		X
	3	OTM		X

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	1	2	3	4	5	6
	FAULTS	AU-AIS	AU-LOP	UNEQ	RDI	SLM	TU-LOM
1	AU-AIS
2	AU-LOP
3	UNEQ (VC4 UNEQ)	X	X
4	RDI (VC4 RDI)	X	X	X
5	SLM	X	X	X
6	TU-LOM	X	X	X		X

Installation and User Guide - N56717020101

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