NEC NEAX2400 system manual How to Set the Fusion Link Test Mode

POST INSTALLATION TEST

Repair Procedure When LED Indicates Abnormality

2.3 Test Procedure

STEP 1: Set the MODE switch to 9 (Fusion Link Test) from 8 (standard setting) on the FCH card and initialize the circuit card by turning the MB switch ON→ OFF

(1) Change the mode switch (8 9). FCH card

(2)Initialize the FCH card.

Mode Switch

FCH PA-

FCHA

PA- 24DTR

DTI

Mode: 8 9 screw driver

8: standard setting	MB	ATTENTION
		Contents
		Static Sensitive
9: Fusion Link Test Mode		Handling
		Precautions Required

				(i) UP
	0	2	4	(ii) DOWN
			6
8	E	C A .

Anti-static Kit

Front View Front View

Note: Be sure to initialize the FCH (PA-FCHA) card after changing the setting of the Mode Switch.

Figure 6-5 How to Set the Fusion Link Test Mode

STEP 2: Select an appropriate loopback point by setting the switch (SW01/SW13B).

Select a loopback point by setting the switch.

DTI (PA-24DTR)

OPE

N-OPE ￿

SW00

PCM

FRM

BER￿

RMT￿

AIS

SW01

To set "Internal Loopback"

4 3

	2
	1
DTI	ON

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

								BL23	SW01/SW13B
1	2	3	4	5	6	7	8
OFF									MB
1	2	3	4	5	6	7	8
1	2	3	4	5	6	7	8			Anti-static Kit
OFF									Payload

OFF

Line (External)

Setting a Loopback point......

Internal

Figure 6-6 Loopback Point Designation

STEP 3: When the LYR LED flashes at 60-INT, the loopback in the block specified in Step 2 is OK.

ND-70185 (E)CHAPTER 6

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