NEC 151944 system manual Remedial Action on Each Lamp Status, PN-DAIA Daia, Daib

CHAPTER 4 TROUBLESHOOTING

This chapter describes the method for fault diagnosis and troubleshooting when maintenance personnel detected the fault occurrence by lamp indication on DAIA, DAIB, and DAIC cards. For other system faults, refer to the Maintenance Manual. Table 4-1shows contents of the fault and the remedial action on each lamp status.

Table 4-1 Remedial Action on Each Lamp Status

CARD NAME	LAMP STATUS	FAULT CONTENT		REMEDIAL ACTION
PN-DAIA (DAIA)	RUN lamp is not flashing	Abnormal operation of	➀	Reset MB switch.
		DAIA card		(Down→Up→Down)
			➁	Check setting of SW1.
				1: FP No.1
				2: FP No.2
				3: FP No.3
				0, 4-F: Not used
			➂	If fault cannot be cleared,
				replace card.
	LINK lamp is not on	Layer 2 link connection	➀	Check whether cable between
		failure between DAIA and		DAIA and DAIB is correctly
		DAIB		connected. (Refer to Chapter 3,
				Section 2.3.)
			➁	Reset MB switch.
				(Down→Up→Down)
	RED lamp is on	PCM signal loss or Frame	➀	Check whether cable between
		Alignment signal loss		DAIA and DAIB is correctly
				connected. (Refer to Chapter 3,
				Section 2.3.)
	RMT lamp is on	Remote alarm	➀	Check whether cable between
				DAIA and DAIB (sending side)
				is correctly connected. (Refer
				to Chapter 3, Section 2.3.)

ND-46550 (E)CHAPTER 4

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Revision 2.0