NEC NEAX2400 system manual Troubleshooting, Chapter, ND-70185E, Page Revision, DTI PA-24DTR

TROUBLESHOOTING

23-S FCH Failure Notification (Detection)

	DTI (PA-24DTR)
	FCH(PA-FCHA)
HUB(PA-M96)
HUB(PA-M96)	MNT 3
	MB
MB	When this MB key is set in up position￿
	(Make-busy), all 10 BASE-T interfaces￿
	connected to this card become ￿
	inoperative.

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

[How to Replace HUB card]
1)	Provide anti-static kit.		to LANI ￿
			(PZ-PC19)
2)	Turn ON the MNT3 switch of the FCH cards which are connected
	to the HUB card to be replaced.
3)	Make sure that system message (23-W) "FCH Alternate Routing
	(start)" is displayed for the FCH cards.
4)	Turn ON the MB key on the HUB card. (make-busy)
5)	Disconnect the 10 BASE-T cables from the card.
6)	Extract the HUB card from the slot.
7)	Set key settings on the new HUB card.
8)	Turn ON the MB key on the new HUB card.	HUB
9)	Mount the new HUB card in the slot.
10) Turn OFF the MB key on the card.
		OPE
		MB
		2
	10 BASE-T	Anti-static Kit

MB key operation

: 10 BASE-T cable

HUB

OPE

MB

2

10 BASE-T

10 BASE-T Cable Disconnection

Figure 7-14 How to Replace HUB (PA-M96) Card

WARNING: When a HUB card is placed in make-busy, all BASE-T interfaces connected to the HUB card become inoperative.

CHAPTER 7 ND-70185 (E)

Page 158

Revision 3.0