NEAX2000
IVS
2
Maintenance Manual
Page 110
ND-70926
(E),
Issue
3.0
CHAPTER 2 TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
PN-24PRTA
(PRT)
RUN lamp is not
flashing
Abnormal operation
of PRT 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
ISDN Primary Rate
D-Channel data link
connection failure
Check the status of the local office line or
public network line.
CRC lamp is on
Bit Error Rate
exceeds the
predetermined
value
Check the receive line and external
equipment.
Replace the remote PRT card.
PCM lamp is on
No PCM signals
arrive from the
distant office
Check to see if the PRT cable is
correctly connected.
Plug and unplug the PRT 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 PRT card.
RMT lamp is on
Frame Alignment
signals cannot be
sent to the remote
PBX
Check the transmission line and
external equipment.
Replace the PRT card.
AIS lamp is on
Remote PBX is in
local loop-back
state
Check the switch settings of the remote
PRT 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
Summary of Contents for NEAX 2000IVS2
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