NEC NEAX2400 Post Installation Test, Repair Procedure When LED Indicates Abnormality, Front

POST INSTALLATION TEST

Repair Procedure When LED Indicates Abnormality

1.1 How to check LYR LED

1.Confirm the LYR LED lights green on the front edge of the FCH (PA-FCHA) circuit card. (See “LED Indication (A)” in Figure 6-2.) When the LED lights green, the fusion link is established.

2.Make sure that any alarm LED is not ON (red/yellow). (See LED Indication (B) in Figure 6-2.) When all alarm LEDs are OFF, the DTI (PA-24DTR) card is in normal operation.

If any abnormal state is detected, please see the NEAX2400 IMX Circuit Card Manual.

					FCH		DTI
				￿	PA-FCHA		PA-24DTR
						OPE		OPE
		LED Indication	(A)
LYR	Remains ON￿				LYR			PCM
	when Fusion Link ￿					EST3		FRM
	is established				LB	EST2		BER
					LOAD	EST1		RMT
						EST0		AIS
			EST3 Send					LED Indication (B)
Remains ON￿		LB	Receive Polarity of		￿	Payload
when available￿
			EST2 pairwire is normal				Line
for Ethernet								If any LED is ON, refer to the "Circuit
			EST1 Receive			Internal
							ON	Card Manual."
			EST0	Link is￿
								PCM : On when PCM loss occurs.￿
				established
Remains ON￿LOAD								FRM : On when Frame Loss occurs.￿
					8	Mode		BER : On when Bit Error occurs.￿
when ready to broadcast￿								RMT : On when Remote Alarm is received.￿
data packets		Note						AIS : On when AIS signal is detected.

DTI

Front Cable

FCH

FRONT

Note: When the FCH is a Root Bridge, the LOAD LED remains ON.

When the FCH is Backup Bridge, the LOAD LED flashes (60INT).

Figure 6-2 LED Indications on Fusion Link Related Circuit Cards

2. Repair Procedure When LED Indicates Abnormality

If the LED indication appears abnormal, check the following items again:

2.1Front Cable

Make sure that front cable 10AL (10) FLT CA is securely inserted into the connectors.

CHAPTER 6 ND-70185 (E)

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Revision 3.0