CHAPTER 2 TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
NEAX2000 IVS
2
Maintenance Manual
ND-70926 (E), Issue 3.0
Page 97
PN-30CCTA (CCT)
RUN lamp is not
flashing
Abnormal operation
of CCT card
Confirm the programming data: CM05
Y=0/Y=1, CM07 YY=01.
Check to see if the SENSE switch is set
as per the AP Number (04-15, 20-31)
assigned by CM05 Y=0.
Reset the MB switch.
(Down
→
Up
→
Down)
If the fault cannot be cleared, replace
the card.
LC lamp is not on
Common signaling
channel data link
connection failure
Check the local office line or public network
line.
PCM lamp is on
No PCM signals
arrive from the
distant office
Check to see if the line is correctly
connected to the CCT card.
Plug and unplug the CCT card.
Repeat this two or three times.
FRM lamp is on
Frame Alignment
signals from the
distant office cannot
be received
Check the receive line and external
equipment.
Replace the remote CCT card.
MFRM lamp is on
Multi-Frame
Alignment signals
from the distant
office cannot be
received
Check the receive line and external
equipment.
Replace the remote CCT card.
RMT lamp is on
Frame Alignment
signals cannot be
sent to the remote
PBX
Check the transmission line and
external equipment.
Replace the CCT card.
MRMT lamp is on
Multi-Frame
Alignment signals
cannot be sent to
the remote PBX
Confirm the switch setting on the CCT
card indicating an alarm.
Replace CCT card not indicating an
alarm, with a spare.
AIS lamp is on
Remote PBX is in
local loop-back
state
Check the switch settings of the remote
CCT card.
Table 2-6 Remedial Action on Each Lamp Status (Continued)
CARD NAME
LAMP STATUS
FAULT
CONTENT
REMEDIAL ACTION
1
2
3
4
1
2
1
2
1
2
1
2
1
2
Summary of Contents for NEAX 2000IVS2
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