User's Manual

CHAPTER 6 ND-70185 (E)
Page 134
Revision 3.0
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.
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:
2.1 Front Cable
Make sure that front cable 10AL (10) FLT CA is securely inserted into the connectors.
LYR
LB
LOAD
EST3
EST2
EST1
EST0
Payload
Line
Internal
ON
8
OPE
OPE
Mode
PCM
FRM
BER
RMT
AIS
LED Indication (A)
LED Indication (B)
DTI
FCH
Front Cable
LYR
LB
LOAD
EST3
EST2
EST1
EST0
Remains ON
when available
for Ethernet
Remains ON
when ready to broadcast
data packets
Note
Link is
established
Receive
Receive Polarity of
pairwire is normal
Send
PA-FCHA
DTI
PA-24DTR
Remains ON
when Fusion Link
is established
PCM : On when PCM loss occurs.
FRM : On when Frame Loss occurs.
BER : On when Bit Error occurs.
RMT : On when Remote Alarm is received.
AIS : On when AIS signal is detected.
If any LED is ON, refer to the "Circuit
Card Manual."
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).