NEC NEAX 2000 IVS2 Maintenance Manual page 104

CHAPTER 2 TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
Table 2-6 Remedial Action on Each Lamp Status (Continued)
CARD NAME
PN-24CCTA (CCT) RUN lamp is not
flashing
LC lamp is not on
CRC lamp is on
PCM lamp is on
FRM lamp is on
RMT lamp is on
AIS lamp is on
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LAMP STATUS
Abnormal operation
of CCT card
Common signaling
channel data link
connection failure
Bit Error Rate
exceeds the
predetermined
value
No PCM signals
arrive from the
distant office
Frame Alignment
signals from the
distant office cannot
be received
Frame Alignment
signals cannot be
sent to the remote
PBX
Remote PBX is in
local loop-back
state
FAULT
CONTENT
1
Confirm the programming data: CM05
Y=0/Y=1, CM07 YY=01.
2
Check to see if the SENSE switch is set
as per the AP Number (04-15, 20-31)
assigned by CM05 Y=0.
3
Reset the MB switch.
(Down→Up→Down)
4
If the fault cannot be cleared, replace
the card.
Check the local office line or public network
line.
1
Check the receive line and external
equipment.
2
Replace the remote CCT card.
1
Check to see if the line is correctly
connected to the CCT card.
2
Plug and unplug the CCT card.
Repeat this two or three times.
1
Check the receive line and external
equipment.
2
Replace the remote CCT card.
1
Check the transmission line and
external equipment.
2
Replace the CCT card.
Check the switch settings of the remote
CCT card.
REMEDIAL ACTION
2
NEAX2000 IVS Maintenance Manual
ND-70926 (E), Issue 3.0