Front Cable; How To Perform The Fusion Link Test; Fusion Link Test Mode Setting; Figure 6-3 Fusion Link Test Mode - NEC NEAX 2400 IPX Manual

2.1 Front Cable

Make sure that front cable 10AL (10) FLT CA is securely inserted into the connectors.
• FCH (PA-FCHA) switch setting
Make sure that the following keys are set properly:
• Dch TS designation (0ch - 23ch: SW11, SW12, SW13)
• Data Link Signal Logic (positive/negative: SW14-1)
• Fusion Data Link Speed (48/56/64 kbps: SW14-2, 3)
• LAPD Signal Link (user/network: SW14-4)
• 24DTI (PA-24DTR) switch setting
Make sure that the keys are properly set on the card. See the NEAX2400 IPX Circuit Card Manual.
If the Fusion link is not established with this repair procedure, perform the Fusion Link Test.

2.2 How to Perform the Fusion Link Test

2.2.1

Fusion Link Test Mode Setting

To set the FCH card in Fusion Link Test Mode, set the Mode Switch to 9. Initialize the FCH card using
the MB key. When the Mode is 9, the Fusion Link Controller on the FCH card sends a test data pattern.
When the same pattern is received again, the PM activates the LYR LED, flashing the LED at 60-INT
to indicate that the test result is OK.
To perform a Fusion link test, set the M ode sw itch to 9.
FCH
PA -
FC H A
LYR
M ode
9
FR O N T VIEW
Loopback points are set by a DTI card.
Note:
Be sure to initialize the FCH (PA-FCHA) card after changing the setting of the Mode Switch.
Note:
Figure 6-3
Fusion Link C ontroller sends
9: F usion Link T est M ode
8: S tandard Setting

Figure 6-3 Fusion Link Test Mode

NDA-24299
Repair Procedure When LED Indicates Abnormality
illustrates the Fusion Link Test Mode.
test data pattern.
Note
Loopback
to DTI card
front cable
D TI Interface
S end Test
D/I Receive Test
D ata P attern
Data Pattern
Fusion Link
C ontroller
FC H card
Test is OK
Flow of Test
POST INSTALLATION TEST
LYR LE D flashes.
CHAPTER 6
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Revision 1.0